import type { Config, ConfigWithEnabled } from '../locale/config.ts';

import { buildDict, buildList, escapeControlSymbols, removeSuffix } from './helpers.ts';
import type { Translator } from './translator.ts';

import type { Example, ExampleValues } from '#shared/language/examples.ts';
import { getBaseMorpheme, MorphemeValues } from '#shared/language/morphemes.ts';
import type {
    NounWords,
    NounWordsRaw,
    NounWord,
    NounDeclensionsByFirstCase,
    NounClassInstance,
    NounConvention,
    Gender,
    Numerus,
} from '#shared/nouns.ts';
import type { WithKey } from '#shared/utils/entriesWithKeys.ts';
import type { NounTemplatesData } from '~~/locale/data.ts';

export class PronounExample {
    singular: Example;
    plural: Example;
    singularNull: Example;
    pluralNull: Example;
    isHonorific: boolean;
    categories: string[];

    constructor(singular: Example, plural: Example, singularNull: Example, pluralNull: Example, isHonorific = false, categories: string[] = []) {
        this.singular = singular;
        this.plural = plural;
        this.singularNull = singularNull;
        this.pluralNull = pluralNull;
        this.isHonorific = isHonorific;
        this.categories = categories;
    }

    example(pronoun: Pronoun, counter = 0): Example {
        const plural = this.isHonorific ? pronoun.isPluralHonorific(counter) : pronoun.isPlural(counter);
        return pronoun.nullPronoun
            ? this[plural ? 'pluralNull' : 'singularNull']
            : this[plural ? 'plural' : 'singular'];
    }
}

export class ExampleCategory {
    name: string | undefined;
    examples: PronounExample[];
    comprehensive: boolean;

    constructor(name: string | undefined, examples: PronounExample[], comprehensive: boolean = false) {
        this.name = name;
        this.examples = examples;
        this.comprehensive = comprehensive;
    }

    static from(examples: PronounExample[], config: Config): ExampleCategory[] {
        if (!config.pronouns.exampleCategories) {
            return examples.map((example) => new ExampleCategory(undefined, [example]));
        }
        return config.pronouns.exampleCategories.map((exampleCategory) => {
            const matchingExamples = examples.filter((example) => {
                return exampleCategory.morphemes?.some((morpheme) => example.singular.hasMorpheme(morpheme)) ||
                    example.categories?.includes(exampleCategory.name);
            });
            return new ExampleCategory(exampleCategory.name, matchingExamples, exampleCategory.comprehensive);
        });
    }
}

function clone<T extends object>(mainObject: T): T {
    const objectCopy = {} as T;
    for (const [key, value] of Object.entries(mainObject)) {
        objectCopy[key as keyof T] = value;
    }
    return objectCopy;
}

export interface Category {
    key: string;
    text: string;
    icon?: string;
}

export const moderationFilters = ['unapproved', 'no key', 'no image', 'no category'] as const;

export interface Filter {
    text: string;
    /** {@link Category.key} */
    category: string;
    moderation: typeof moderationFilters[number] | undefined;
}

export interface Entry {
    id: string;
    approved: boolean;

    matches(filter: Filter): boolean;
}

export type SourceType = '' | 'Book' | 'Article' | 'Movie' | 'Series' | 'Song' | 'Poetry' | 'Comics' | 'Game' | 'Other';

export interface SourceRaw {
    id: string;
    pronouns: string;
    type: SourceType;
    author: string | null;
    title: string;
    extra: string | null;
    year: number | null;
    fragments?: string;
    comment?: string | null;
    link?: string | null;
    spoiler?: boolean;
    submitter?: string | null;
    approved: boolean;
    base_id?: string | null;
    key?: string | null;
    versions?: SourceRaw[];
    locale?: string;
    images?: string | null;
}

export class Source implements Entry {
    id: string;
    pronouns: string[];
    type: SourceType;
    author: string | null;
    title: string;
    extra: string | null;
    year: number | null;
    fragments: string[];
    comment: string | null;
    link: string | null;
    spoiler: boolean;
    submitter: string | null;
    approved: boolean;
    base_id: string | null;
    key: string | null;
    versions: Source[];
    locale: string;
    images: string[];
    typePriority?: number;
    sortString?: string;
    index?: string;

    constructor(config: Config, {
        id, pronouns, type, author, title, extra, year, fragments = '',
        comment = null, link = null, spoiler = false,
        submitter = null, approved, base_id = null,
        key = null, versions = [], locale = config.locale,
        images = null,
    }: SourceRaw) {
        this.id = id;
        this.pronouns = pronouns ? pronouns.split(';') : [];
        this.type = type;
        this.author = author;
        this.title = title;
        this.extra = extra;
        this.year = year;
        this.fragments = fragments
            ? fragments.replace(/\|/g, '\n').replace(/\\@/g, '###')
                    .split('@')
                    .map((x) => x.replace(/###/g, '@'))
            : [];
        this.comment = comment;
        this.link = link;
        this.spoiler = !!spoiler;
        this.submitter = submitter;
        this.approved = approved;
        this.base_id = base_id;
        this.key = key;
        this.versions = versions.map((v) => new Source(config, v));
        this.locale = locale;
        this.images = images ? images.split(',') : [];
    }

    static get TYPES(): Record<SourceType, string> {
        return {
            '': 'clipboard-list',
            'Book': 'book-open',
            'Article': 'newspaper',
            'Movie': 'film',
            'Series': 'tv',
            'Song': 'music',
            'Poetry': 'scroll',
            'Comics': 'file-image',
            'Game': 'gamepad-alt',
            'Other': 'comment-alt-lines',
        };
    }

    static get TYPES_PRIORITIES(): Record<SourceType, number> {
        return {
            '': 4,
            'Book': 1,
            'Article': 2,
            'Movie': 3,
            'Series': 3,
            'Song': 0,
            'Poetry': 0,
            'Comics': 4,
            'Game': 4,
            'Other': 4,
        };
    }

    icon(): string {
        return Source.TYPES[this.type];
    }

    matches(filter: Filter) {
        return (!filter.text || !!this.index?.includes(filter.text.toLowerCase())) &&
            (!filter.category || this.type === filter.category) &&
            this.matchesModeration(filter.moderation);
    }

    matchesModeration(moderationFilter: Filter['moderation']) {
        switch (moderationFilter) {
            case undefined:
                return true;
            case 'unapproved':
                return !this.approved;
            case 'no key':
                return !this.key;
            default:
                return false;
        }
    }
}

export class SourceLibrary {
    sources: Source[];
    map: Record<string, Source[]>;
    countApproved: number;
    countPending: number;
    pronouns: string[];
    multiple: string[];
    cache: Record<string, Source[]>;

    constructor(config: Config, rawSources: SourceRaw[]) {
        this.sources = rawSources.map((s) => new Source(config, s));
        this.map = {};
        const multiple = new Set<string>();
        const pronouns = new Set<string>();
        this.countApproved = 0;
        this.countPending = 0;

        for (const source of this.sources) {
            this[source.approved ? 'countApproved' : 'countPending']++;

            if (!source.pronouns.length) {
                if (this.map[''] === undefined) {
                    this.map[''] = [];
                }
                this.map[''].push(source);
                continue;
            }
            for (const pronoun of source.pronouns) {
                if (this.map[pronoun] === undefined) {
                    this.map[pronoun] = [];
                }
                this.map[pronoun].push(source);

                pronouns.add(pronoun);
                if (pronoun.includes('&')) {
                    multiple.add(pronoun);
                }
            }
        }
        this.pronouns = [...pronouns];
        this.multiple = [...multiple];
        this.cache = {};
    }

    getForPronoun(pronoun: string, pronounLibrary: PronounLibrary | null = null): Source[] {
        if (this.cache[pronoun] === undefined) {
            let sources = this.map[pronoun] || [];

            if (pronoun === '') {
                for (const p of this.pronouns) {
                    if (pronounLibrary && !pronounLibrary.isCanonical(p)) {
                        sources = [...sources, ...this.map[p]];
                    }
                }
            }

            this.cache[pronoun] = sources
                .map((s) => this.addMetaData(s))
                .sort((a, b) => {
                    if (a.typePriority !== b.typePriority) {
                        return b.typePriority! - a.typePriority!;
                    }

                    return a.sortString!.localeCompare(b.sortString!);
                });
        }

        return this.cache[pronoun];
    }

    getForPronounExtended(pronoun: string): Record<string, Source[] | undefined> {
        const sources: Record<string, Source[] | undefined> = {};
        const s = this.getForPronoun(pronoun);
        sources[pronoun] = s.length ? s : undefined;

        if (pronoun.includes('&')) {
            for (const option of pronoun.split('&')) {
                const s = this.getForPronoun(option);
                sources[option] = s.length ? s : undefined;
            }
        }

        return sources;
    }

    addMetaData(source: Source): Source {
        source.typePriority = Source.TYPES_PRIORITIES[source.type];

        source.sortString = source.author || `ZZZZZ${source.title}`; // if no author, put on the end
        if (source.sortString.includes('^')) {
            const index = source.sortString.indexOf('^');
            source.sortString = `${source.sortString.substring(index + 1)} ${source.sortString.substring(0, index)}`;
        }

        source.index = [
            (source.author || '').replace('^', ''),
            source.title,
            source.extra,
            source.year,
            ...source.fragments,
            source.comment,
            source.link,
        ].join(' ').toLowerCase()
            .replace(/<\/?[^>]+(>|$)/g, '');

        return source;
    }
}

const escape = (s: string[] | string | null): string => {
    if (Array.isArray(s)) {
        s = s.join('&');
    }
    return (s || '')
        .replace(/,/g, '')
        .replace(/!/g, '')
        .replace(/\./g, '')
        // .replace(/\/', '%2F')
        .replace(/#/g, '%23')
        .replace(/\?/g, '%3F');
};

export interface PronounUsage {
    short: { options: string[]; glue?: string };
    pronoun?: Pronoun;
}

export class Pronoun {
    config: ConfigWithEnabled<'pronouns'>;
    canonicalName: string;
    description: string | string[];
    normative: boolean;
    morphemes: Record<string, string | null>;
    pronunciations: Record<string, string | null>;
    plural: boolean[];
    pluralHonorific: boolean[];
    aliases: string[];
    history: string;
    pronounceable: boolean;
    thirdForm: string | null;
    smallForm: string | null;
    sourcesInfo: string | null;
    hidden: boolean;
    nullPronoun: boolean;
    static DESCRIPTION_MAXLENGTH = 64;

    constructor(
        config: ConfigWithEnabled<'pronouns'>,
        canonicalName: string,
        description: string | string[],
        normative: boolean,
        morphemes: Record<string, string | null>,
        plural: boolean[],
        pluralHonorific: boolean[],
        aliases: string[] = [],
        history: string = '',
        pronounceable: boolean = true,
        thirdForm: string | null = null,
        smallForm: string | null = null,
        sourcesInfo: string | null = null,
        hidden: boolean = false,
        nullPronoun: boolean = false,
    ) {
        this.config = config;
        this.canonicalName = canonicalName;
        this.description = description || '';
        this.normative = normative;
        this.morphemes = {};
        this.pronunciations = {};
        for (const [m, value] of Object.entries(morphemes)) {
            const [morpheme, pronunciation] = typeof value === 'string' ? value.split('|') : [null, null];
            this.morphemes[m] = morpheme;
            this.pronunciations[m] = pronunciation;
        }
        this.plural = plural;
        this.pluralHonorific = pluralHonorific;
        this.aliases = aliases;
        this.history = history;
        this.pronounceable = pronounceable;
        this.thirdForm = thirdForm;
        this.smallForm = smallForm;
        this.sourcesInfo = sourcesInfo;
        this.hidden = hidden;
        this.nullPronoun = nullPronoun;
    }

    pronoun(): string | null {
        return this.morphemes[this.config.pronouns.morphemes[0]];
    }

    nameOptions(): string[] {
        const options: Set<string> = new Set();
        const optionsN = (this.morphemes[this.config.pronouns.morphemes[0]] || '').split('&');
        if (this.config.pronouns.morphemes.length === 1 || this.config.pronouns.shortMorphemes === 1) {
            return optionsN;
        }
        const optionsG: string[] = (this.morphemes[this.config.pronouns.morphemes[1]] || '').split('&');
        const optionsGAlt = this.config.pronouns.morphemes.length > 2
            ? (this.morphemes[this.config.pronouns.morphemes[2]] || '').split('&')
            : [];

        for (let i = 0; i < optionsN.length; i++) {
            const optionN = optionsN[i];
            let optionG = optionsG[i < optionsG.length - 1 ? i : optionsG.length - 1];
            if (optionN === optionG && optionsGAlt.length && this.config.pronouns.shortMorphemes !== 3) {
                optionG = optionsGAlt[i < optionsGAlt.length - 1 ? i : optionsGAlt.length - 1];
            }
            // If there is no secondary option, don't include a `/`
            let nameOption = optionG ? `${optionN}/${optionG}` : optionN;
            if (this.config.pronouns.shortMorphemes === 3) {
                let thirdForms = (this.morphemes[this.config.pronouns.morphemes[2]] || '').split('&');
                if (this.config.locale === 'ru' || this.config.locale === 'ua') {
                    thirdForms = thirdForms.map((x) => `[-${x}]`);
                }
                nameOption += `/${thirdForms[i]}`;
            } else if (this.thirdForm) {
                nameOption += `/${this.morphemes[this.thirdForm]?.split('&')[i]}`;
            }

            options.add(nameOption);
        }

        return [...options];
    }

    name(glue?: string): string {
        return this.nameOptions().join(glue);
    }

    clone(removeDescription: boolean = false): Pronoun {
        return new Pronoun(
            this.config,
            this.canonicalName,
            removeDescription ? '' : this.description,
            this.normative,
            clone(this.morphemes),
            [...this.plural],
            [...this.pluralHonorific],
            [...this.aliases],
            this.history,
            this.pronounceable,
        );
    }

    equals(other: Pronoun, ignoreBaseDescription = false): boolean {
        return this.toString() === other.clone(ignoreBaseDescription).toString();
    }

    merge(other: Pronoun): Pronoun {
        const descriptionA = Array.isArray(this.description) ? this.description : [this.description];
        const descriptionB = Array.isArray(other.description) ? other.description : [other.description];
        const config = this.config;
        return new Pronoun(
            this.config,
            `${this.canonicalName}&${other.canonicalName}`,
            [...descriptionA, ...descriptionB],
            this.normative && other.normative,
            buildDict(function* (that, other) {
                for (const morpheme of config.pronouns.morphemes) {
                    yield [morpheme, `${that.morphemes[morpheme] || ''}&${other.morphemes[morpheme] || ''}`];
                    // yield [morpheme, buildMorpheme(that.morphemes[morpheme], that.plural) + '&' + buildMorpheme(other.morphemes[morpheme], other.plural)]
                }
            }, this, other),
            [...this.plural, ...other.plural],
            [...this.pluralHonorific, ...other.pluralHonorific],
            [],
            '',
            false,
        );
    }

    toMorphemeValues(counter = 0): MorphemeValues {
        return new MorphemeValues(Object.fromEntries(Object.entries(this.morphemes)
            .filter(([_morpheme, spelling]) => spelling !== null)
            .map(([morpheme, spelling]) => {
                if (spelling === null) {
                    return [morpheme, undefined];
                }
                const spellingOptions = spelling.split('&');
                let pronunciation: string | false | undefined;
                if (this.pronounceable) {
                    const pronunciationOptions = this.pronunciations[morpheme]?.split('&');
                    pronunciation = pronunciationOptions
                        ? pronunciationOptions[counter % pronunciationOptions.length]
                        : undefined;
                } else {
                    pronunciation = false;
                }
                return [morpheme, {
                    spelling: spellingOptions[counter % spellingOptions.length],
                    pronunciation,
                }];
            })));
    }

    toExampleValues(counter = 0): ExampleValues {
        return { morphemeValues: this.toMorphemeValues(counter), plural: this.isPlural(counter) };
    }

    isInterchangable(morpheme: string): boolean {
        return (this.morphemes[getBaseMorpheme(morpheme)] || '').includes('&');
    }

    isPlural(counter = 0): boolean {
        return this.plural[counter % this.plural.length];
    }

    isPluralHonorific(counter = 0): boolean {
        return this.pluralHonorific[counter % this.pluralHonorific.length];
    }

    format(str: string): string {
        return str.replace(/{[^}]+}/g, (m) => (this.morphemes[m.substring(1, m.length - 1)] || '').split('&')[0]);
    }

    toArray(): string[] {
        const elements = Object.values(this.morphemes).map((s) => escape(s));
        // TODO #136
        // Object.values(this.pronunciations).forEach((p, i) => {
        //     if (p) {
        //         elements[i] += '|' + escape(p);
        //     }
        // });
        if (this.config.pronouns.plurals) {
            elements.push(this.plural.map((p) => p ? 1 : 0).join(''));
            if (this.config.pronouns.honorifics) {
                elements.push(this.pluralHonorific.map((p) => p ? 1 : 0).join(''));
            }
        }
        elements.push(escape(this.description));
        return elements;
    }

    toString(): string {
        return this.toArray().join(',');
    }

    toStringSlashes(translator: Translator): string | null {
        if (!this.config.pronouns.generator?.enabled || !this.config.pronouns.generator.slashes) {
            return null;
        }

        let chunks;
        if (Array.isArray(this.config.pronouns.generator.slashes)) {
            chunks = this.config.pronouns.generator.slashes.map((m: string) => this.morphemes[m]);
        } else {
            chunks = Object.values(this.morphemes);
        }
        chunks = chunks.map((chunk: string | null): string => {
            if (chunk === null) {
                return '~';
            } else if (chunk === '') {
                // use an extra space because double slashes get replaced by a single one during a request
                return ' ';
            } else {
                return escapeControlSymbols(chunk)!;
            }
        });

        if (this.plural[0]) {
            chunks.push(`:${translator.translate('pronouns.slashes.plural')}`);
        }
        if (this.pluralHonorific[0]) {
            chunks.push(`:${translator.translate('pronouns.slashes.pluralHonorific')}`);
        }
        if (this.description && !Array.isArray(this.description)) {
            const escapedDescription = escapeControlSymbols(this.description);
            chunks.push(`:${translator.translate('pronouns.slashes.description')}=${escapedDescription}`);
        }

        // encode a trailing space so that it does not get removed during a request
        return chunks.join('/').replace(/ $/, encodeURI(' '));
    }

    static from(data: (string | null)[], config: ConfigWithEnabled<'pronouns'>): Pronoun | null {
        if (!data) {
            return null;
        }

        let extraFields = 1; // description

        if (config.locale === 'pl') {
            try {
                if (['0', '1'].includes(data[data.length - 1]!)) {
                    data.push(''); // description
                }

                if (data.length === 22) {
                    data.splice(2, 0, data[4]);
                    data.splice(8, 0, data[8]);
                    data.splice(8, 0, data[8]);
                } else if (data.length === 23) {
                    data.splice(2, 0, data[4]);
                    data.splice(8, 0, data[8]);
                } else if (data.length === 24) {
                    data.splice(2, 0, data[4]);
                }

                if (data.length < 30) {
                    data = [
                        data[0],
                        data[1],
                        // g
                        data[2],
                        data[1],
                        data[1]!.replace(/^je/, 'nie'),
                        // d
                        data[4]!.replace(/^je/, ''),
                        data[4],
                        data[4]!.replace(/^je/, 'nie'),
                        // a
                        data[5]!.replace(/^je/, ''),
                        data[5],
                        data[5]!.replace(/^je/, 'nie'),
                        // rest
                        ...data.slice(6),
                    ];
                }

                if (data.length < 31) {
                    data = [
                        ...data.slice(0, data.length - 8),
                        data[data.length - 8],
                        ...data.slice(data.length - 8),
                    ];
                }
            } catch {
                return null;
            }
        }

        if (config.pronouns.plurals) {
            extraFields += 1;
            if (![0, 1].includes(parseInt(data[config.pronouns.morphemes.length]!))) {
                return null;
            }
            if (config.pronouns.honorifics) {
                extraFields += 1;
                if (![0, 1].includes(parseInt(data[config.pronouns.morphemes.length + 1]!))) {
                    return null;
                }
            }
        }

        if (data.length === config.pronouns.morphemes.length + extraFields - 1) {
            data.push(''); // description
        }

        if (data.length !== config.pronouns.morphemes.length + extraFields ||
            data[0]!.length === 0 ||
            data[data.length - 1]!.length > Pronoun.DESCRIPTION_MAXLENGTH ||
            data.slice(1, data.length - extraFields).filter((s) => s !== null && s.length > 24).length
        ) {
            return null;
        }

        const m: Record<string, string> = {};
        for (const i in config.pronouns.morphemes) {
            m[config.pronouns.morphemes[parseInt(i)]] = data[parseInt(i)]!;
        }

        return new Pronoun(
            config,
            `${m[config.pronouns.morphemes[0]]}/${m[config.pronouns.morphemes[1]]}`,
            data[data.length - 1]!,
            false,
            m,
            config.pronouns.plurals ? data[config.pronouns.morphemes.length]!.split('').map((p) => parseInt(p) === 1) : [false],
            config.pronouns.honorifics ? data[config.pronouns.morphemes.length + 1]!.split('').map((p) => parseInt(p) === 1) : [false],
            [],
            '__generator__',
            false,
        );
    }
}

export class PronounGroup {
    name: string;
    pronouns: string[];
    description: string | null;
    key: string | null;
    hidden: boolean;

    constructor(
        name: string,
        pronouns: string[],
        description: string | null = null,
        key: string | null = null,
        hidden: boolean = false,
    ) {
        this.name = name;
        this.pronouns = pronouns;
        this.description = description;
        this.key = key;
        this.hidden = hidden;
    }
}

export class MergedPronounGroup {
    key: string;
    groups: { group: PronounGroup; groupPronouns: Record<string, Pronoun> }[];

    constructor(key: string, groups: { group: PronounGroup; groupPronouns: Record<string, Pronoun> }[]) {
        this.key = key;
        this.groups = groups;
    }

    short(translator: Translator): string {
        const specificTranslationKey = `pronouns.any.group.${this.key}.short`;
        if (translator.has(specificTranslationKey)) {
            return translator.translate(specificTranslationKey);
        } else {
            return `${translator.translate('pronouns.any.short')} ${this.key}`;
        }
    }
}

export class PronounLibrary {
    config: Config;
    groups: PronounGroup[];
    pronouns: Record<string, Pronoun>;
    canonicalNames: string[];

    constructor(config: Config, groups: PronounGroup[], pronouns: Record<string, Pronoun>) {
        this.config = config;
        this.groups = groups;
        this.pronouns = pronouns;
        this.canonicalNames = Object.keys(this.pronouns);
    }

    *split(filter: ((pronoun: Pronoun) => boolean) | null = null, includeOthers: boolean = true):
    Generator<[PronounGroup, Pronoun[]]> {
        let pronounsLeft = Object.keys(this.pronouns);
        const that = this;

        for (const g of this.groups) {
            yield [g, buildList(function* () {
                for (const t of g.pronouns) {
                    pronounsLeft = pronounsLeft.filter((i) => i !== t);
                    const pronoun = that.pronouns[t] || t;
                    if (!filter || filter(pronoun)) {
                        yield pronoun;
                    }
                }
            })];
        }

        if (!pronounsLeft.length || !includeOthers) {
            return;
        }

        if (this.config.pronouns.others !== undefined) {
            yield [
                new PronounGroup(this.config.pronouns.others, pronounsLeft),
                buildList(function* () {
                    for (const t of pronounsLeft) {
                        if (!filter || filter(that.pronouns[t])) {
                            yield that.pronouns[t];
                        }
                    }
                }),
            ];
        }
    }

    byKey(): Record<string, MergedPronounGroup> {
        const ret: Record<string, MergedPronounGroup> = {};
        for (const g of this.groups) {
            if (g.key === null) {
                continue;
            }
            if (ret[g.key] === undefined) {
                ret[g.key] = new MergedPronounGroup(g.key, []);
            }

            const p: Record<string, Pronoun> = {};
            for (const t of g.pronouns) {
                const pronoun = this.pronouns[t];
                if (!pronoun) {
                    continue;
                }
                p[pronoun.canonicalName] = pronoun;
            }

            ret[g.key].groups.push({ group: g, groupPronouns: p });
        }
        return ret;
    }

    find(pronoun: Pronoun | null): { group: PronounGroup; groupPronouns: Pronoun[] } | null {
        if (!pronoun) {
            return null;
        }

        for (const [group, groupPronouns] of this.split()) {
            for (const t of groupPronouns) {
                if (t.canonicalName === pronoun.canonicalName) {
                    return { group, groupPronouns };
                }
            }
        }
        return null;
    }

    isCanonical(pronoun: string): boolean {
        for (const p of pronoun.split('&')) {
            if (!this.canonicalNames.includes(p)) {
                return false;
            }
        }
        return true;
    }
}

export interface NounRaw {
    id: string;
    key?: string | null;
    words: NounWordsRaw;
    classInstance?: NounClassInstance | null;
    categories?: string[];
    sources?: string[];
    sourcesData?: SourceRaw[];
    approved?: boolean;
    base?: string | null;
    author?: string | null;
}

const loadWord = (
    config: Config,
    declensionsByFirstCase: NounDeclensionsByFirstCase,
    wordRaw: string | NounWord,
    numerus: Numerus,
): NounWord => {
    if (typeof wordRaw === 'string') {
        wordRaw = { spelling: wordRaw };
    }
    if (config.nouns.declension?.enabled && config.nouns.declension.detect) {
        for (const [declensionSuffix, declensionKey] of Object.entries(declensionsByFirstCase[numerus])) {
            if (wordRaw.spelling.endsWith(declensionSuffix)) {
                return {
                    spelling: removeSuffix(wordRaw.spelling, declensionSuffix),
                    declension: declensionKey,
                };
            }
        }
    }
    return wordRaw;
};

export interface NounRawWithLoadedWords extends Omit<NounRaw, 'words'> {
    words: NounWords;
}

export const loadWords = (
    nounRaw: NounRaw,
    config: Config,
    declensionsByFirstCase: NounDeclensionsByFirstCase,
): NounRawWithLoadedWords => {
    const words = Object.fromEntries(Object.entries(nounRaw.words).map(([gender, wordsOfGender]) => {
        return [gender, Object.fromEntries(Object.entries(wordsOfGender).map(([numerus, wordsOfNumerus]) => {
            return [numerus, wordsOfNumerus
                .map((wordRaw) => loadWord(config, declensionsByFirstCase, wordRaw, numerus as Numerus))];
        }))];
    }));

    return { ...nounRaw, words };
};

export const filterWordsForConvention = (
    nounRaw: NounRawWithLoadedWords,
    nounConvention: WithKey<NounConvention> | undefined = undefined,
): NounRawWithLoadedWords | undefined => {
    const words = Object.fromEntries(Object.entries(nounRaw.words).map(([gender, wordsOfGender]) => {
        return [gender, Object.fromEntries(Object.entries(wordsOfGender).map(([numerus, wordsOfNumerus]) => {
            return [numerus, wordsOfNumerus
                .filter((word) => {
                    return nounConvention === undefined ||
                        ['masc', 'fem'].includes(gender) || word.convention === nounConvention.key;
                })];
        }))];
    }));

    if (nounConvention !== undefined && !hasWordOfGender(words, 'neutr') && !hasWordOfGender(words, 'nb')) {
        return undefined;
    }
    return { ...nounRaw, words };
};

const hasWordOfGender = (words: NounWords, gender: Gender): boolean => {
    return Object.values(words[gender] ?? {}).flatMap((wordsOfNumerus) => wordsOfNumerus).length > 0;
};

export class Noun implements Entry {
    id: string;
    key: string;
    words: NounWords;
    classInstance: NounClassInstance | null;
    categories: string[];
    sources: string[];
    sourcesData: Source[];
    approved: boolean;
    base: string | null;
    author: string | null;

    constructor(config: Config, nounRaw: NounRawWithLoadedWords) {
        this.id = nounRaw.id;
        this.key = nounRaw.key ?? '';
        this.words = nounRaw.words;
        this.classInstance = nounRaw.classInstance ?? null;
        this.categories = nounRaw.categories ?? [];
        this.sources = nounRaw.sources ?? [];
        this.sourcesData = nounRaw.sourcesData?.filter((s) => !!s).map((s) => new Source(config, s)) ?? [];
        this.approved = nounRaw.approved ?? true;
        this.base = nounRaw.base ?? null;
        this.author = nounRaw.author ?? null;
    }

    get firstWords(): string[] {
        return Object.values(this.words)
            .map((wordsByNumerus) => wordsByNumerus.singular?.[0])
            .filter((word) => word !== undefined)
            .map((word) => word.spelling);
    }

    matches(filter: Filter) {
        return this.matchesText(filter.text) &&
            (!filter.category || this.categories.includes(filter.category)) &&
            this.matchesModeration(filter.moderation);
    }

    matchesText(filter: string): boolean {
        if (!filter) {
            return true;
        }

        const words = Object.values(this.words)
            .flatMap((wordsByNumerus) => Object.values(wordsByNumerus))
            .flatMap((words) => words);
        for (const word of words) {
            const value = word.spelling.toLowerCase();
            if (filter.startsWith('-') && value.endsWith(filter.substring(1))) {
                return true;
            } else if (filter.endsWith('-') && value.startsWith(filter.substring(0, filter.length - 1))) {
                return true;
            } else if (value.indexOf(filter.toLowerCase()) > -1) {
                return true;
            }
        }
        return false;
    }

    matchesModeration(moderationFilter: Filter['moderation']) {
        switch (moderationFilter) {
            case undefined:
                return true;
            case 'unapproved':
                return !this.approved;
            case 'no category':
                return this.categories.length === 0;
            default:
                return false;
        }
    }

    compare(other: Noun, collator: Intl.Collator): number {
        if (this.approved && !other.approved) {
            return 1;
        }
        if (!this.approved && other.approved) {
            return -1;
        }
        return collator.compare(this.key, other.key);
    }
}

export class NounTemplate {
    masc: string[];
    fem: string[];
    neutr: string[];
    nb: string[];
    mascPl: string[];
    femPl: string[];
    neutrPl: string[];
    nbPl: string[];

    constructor(masc: string[], fem: string[], neutr: string[], nb: string[], mascPl: string[], femPl: string[], neutrPl: string[], nbPl: string[]) {
        this.masc = masc;
        this.fem = fem;
        this.neutr = neutr;
        this.nb = nb;
        this.mascPl = mascPl;
        this.femPl = femPl;
        this.neutrPl = neutrPl;
        this.nbPl = nbPl;
    }

    static from(data: NounTemplatesData): NounTemplate {
        return new NounTemplate(
            data.masc?.split('/') ?? [],
            data.fem?.split('/') ?? [],
            data.neutr?.split('/') ?? [],
            data.nb?.split('/') ?? [],
            data.mascPl?.split('/') ?? [],
            data.femPl?.split('/') ?? [],
            data.neutrPl?.split('/') ?? [],
            data.nbPl?.split('/') ?? [],
        );
    }

    fill(stem: string): Omit<NounRawWithLoadedWords, 'id'> {
        return {
            key: stem,
            words: {
                masc: {
                    singular: this.masc.map((e) => ({ spelling: e.replace('-', stem) })),
                    plural: this.mascPl.map((e) => ({ spelling: e.replace('-', stem) })),
                },
                fem: {
                    singular: this.fem.map((e) => ({ spelling: e.replace('-', stem) })),
                    plural: this.femPl.map((e) => ({ spelling: e.replace('-', stem) })),
                },
                neutr: {
                    singular: this.neutr.map((e) => ({ spelling: e.replace('-', stem) })),
                    plural: this.neutrPl.map((e) => ({ spelling: e.replace('-', stem) })),
                },
                nb: {
                    singular: this.nb.map((e) => ({ spelling: e.replace('-', stem) })),
                    plural: this.nbPl.map((e) => ({ spelling: e.replace('-', stem) })),
                },
            },
            categories: [],
            sources: [],
            base: null,
        };
    }

    toString(): string {
        return [this.masc, this.fem, this.neutr, this.mascPl, this.femPl, this.neutrPl]
            .map((es) => es.join('/'))
            .join(', ')
        ;
    }
}

export interface InclusiveEntryRaw {
    id: string;
    insteadOf: string;
    say: string;
    because: string;
    author: string;
    approved?: boolean;
    base_id?: string | null;
    categories?: string | null;
    links?: string | null;
    clarification?: string | null;
}

export class InclusiveEntry implements Entry {
    id: string;
    insteadOf: string[];
    say: string[];
    because: string;
    author: string;
    approved: boolean;
    base: string | null;
    categories: string[];
    links: string[];
    clarification: string | null;

    constructor({
        id, insteadOf, say, because, author, approved = true, base_id = null, categories = '', links = '[]',
        clarification = null,
    }: InclusiveEntryRaw) {
        this.id = id;
        this.insteadOf = insteadOf.split('|');
        this.say = say.split('|');
        this.because = because;
        this.author = author;
        this.approved = !!approved;
        this.base = base_id;
        this.categories = categories ? categories.split(',') : [];
        this.links = links ? JSON.parse(links) : [];
        this.clarification = clarification || null;
    }

    matches(filter: Filter) {
        return this.matchesText(filter.text) &&
            (!filter.category || this.categories.includes(filter.category)) &&
            this.matchesModeration(filter.moderation);
    }

    matchesText(filter: string): boolean {
        if (!filter) {
            return true;
        }

        for (const field of ['insteadOf', 'say'] as const) {
            for (const value of this[field]) {
                if (value.toLowerCase().indexOf(filter.toLowerCase()) > -1) {
                    return true;
                }
            }
        }
        return false;
    }

    matchesModeration(moderationFilter: Filter['moderation']) {
        switch (moderationFilter) {
            case undefined:
                return true;
            case 'unapproved':
                return !this.approved;
            case 'no category':
                return this.categories.length === 0;
            default:
                return false;
        }
    }
}

export interface TermsEntryRaw {
    id: string;
    term: string;
    original: string | null;
    key?: string | null;
    definition: string;
    author: string | null;
    category?: string | null;
    flags?: string;
    images?: string;
    approved?: boolean;
    base_id?: string | null;
    locale: string;
    versions?: TermsEntryRaw[];
}

export class TermsEntry implements Entry {
    id: string;
    term: string[];
    original: string[];
    key: string | null;
    definition: string;
    author: string | null;
    categories: string[];
    flags: string[];
    images: string[];
    approved: boolean;
    base: string | null;
    locale: string;
    versions: TermsEntry[];

    constructor({
        id, term, original, key = null, definition, author, category = null, flags = '[]', images = '', approved = true,
        base_id = null, locale, versions = [],
    }: TermsEntryRaw) {
        this.id = id;
        this.term = term.split('|');
        this.original = original ? original.split('|') : [];
        this.key = key || null;
        this.definition = definition;
        this.author = author;
        this.categories = category ? category.split(',') : [];
        this.flags = JSON.parse(flags);
        this.images = images ? images.split(',') : [];
        this.approved = !!approved;
        this.base = base_id;
        this.locale = locale;
        this.versions = versions.map((v) => new TermsEntry(v));
    }

    matches(filter: Filter) {
        return this.matchesText(filter.text) &&
            (!filter.category || this.categories.includes(filter.category)) &&
            this.matchesModeration(filter.moderation);
    }

    matchesText(filter: string): boolean {
        if (!filter) {
            return true;
        }

        if (this.key && this.key.toLowerCase().indexOf(filter.toLowerCase()) > -1) {
            return true;
        }

        for (const field of ['term', 'original'] as const) {
            for (const value of this[field]) {
                if (value.toLowerCase().indexOf(filter.toLowerCase()) > -1) {
                    return true;
                }
            }
        }
        return false;
    }

    matchesModeration(moderationFilter: Filter['moderation']) {
        switch (moderationFilter) {
            case undefined:
                return true;
            case 'unapproved':
                return !this.approved;
            case 'no key':
                return !this.key;
            case 'no image':
                return this.flags.length === 0 && this.images.length === 0;
            case 'no category':
                return this.categories.length === 0;
            default:
                return false;
        }
    }
}

export interface NameRaw {
    id: string;
    name: string;
    origin: string | null;
    meaning: string | null;
    usage: string | null;
    legally: string | null;
    pros: string | null;
    cons: string | null;
    notablePeople: string | null;
    links: string | null;
    namedays: string | null;
    namedaysComment: string | null;
    approved: boolean;
    base_id: string | null;
    author: string | null;
}

export class Name {
    id: string;
    name: string;
    origin: string | null;
    meaning: string | null;
    usage: string | null;
    legally: string | null;
    pros: string[];
    cons: string[];
    notablePeople: string[];
    links: string[];
    namedays: string[];
    namedaysComment: string | null;
    approved: boolean;
    base: string | null;
    author: string | null;

    constructor({
        id, name, origin, meaning, usage, legally, pros, cons, notablePeople, links, namedays, namedaysComment,
        approved, base_id = null, author = null,
    }: NameRaw) {
        this.id = id;
        this.name = name;
        this.origin = origin;
        this.meaning = meaning;
        this.usage = usage;
        this.legally = legally;
        this.pros = pros ? pros.split('|') : [];
        this.cons = cons ? cons.split('|') : [];
        this.notablePeople = notablePeople ? notablePeople.split('|') : [];
        this.links = links ? links.split('|') : [];
        this.namedays = namedays ? namedays.split('|') : [];
        this.namedaysComment = namedaysComment;
        this.approved = !!approved;
        this.base = base_id;
        this.author = author;
    }

    matches(filter: string): boolean {
        if (!filter) {
            return true;
        }

        for (const field of ['name', 'meaning'] as const) {
            if ((this[field] || '').toLowerCase().indexOf(filter.toLowerCase()) > -1) {
                return true;
            }
        }

        return false;
    }
}

export class Person {
    name: string;
    description: string;
    pronouns: Record<string, { display: string; link: string }[]>;
    sources: string[];

    constructor(name: string, description: string, pronouns: string[], sources: string[] = []) {
        this.name = name;
        this.description = description;
        this.pronouns = {};
        for (const p of pronouns) {
            const [language, display, link] = p.split(':');
            if (this.pronouns[language] === undefined) {
                this.pronouns[language] = [];
            }
            this.pronouns[language].push({ display, link });
        }
        this.sources = sources;
    }
}