import { beforeEach, describe, expect, test } from 'vitest';

import type { NullPronounsConfig } from '~/locale/config.ts';
import type { Translations } from '~/locale/translations.ts';
import { buildPronoun, buildPronounUsage } from '~/src/buildPronoun.ts';
import { PronounGroup, Pronoun, PronounLibrary } from '~/src/classes.ts';
import { Translator } from '~/src/translator.ts';
import { configWithPronouns } from '~/test/fixtures/config.ts';
import pronounsFactory, { generated as generatedPronouns } from '~/test/fixtures/pronouns.ts';

const translations: Translations = {};

beforeEach(() => {
    translations.pronouns = {
        any: {
            short: 'any',
        },
        slashes: {
            plural: 'plural',
            pluralHonorific: 'plural-honorific',
            description: 'description',
        },
        or: 'or',
    };
});

const translator = new Translator(translations, translations, configWithPronouns);

let config = structuredClone(configWithPronouns);
const pronouns = Object.fromEntries(Object.entries(pronounsFactory)
    .map(([name, pronounFactory]) => [name, pronounFactory(config)]));

beforeEach(() => {
    config = structuredClone(configWithPronouns);
});

test('finds pronouns by canonical name', () => {
    const actual = buildPronoun(pronouns, 'they', config, translator);
    expect(actual).toBeDefined();
    expect(actual).toBe(pronouns.they);
});
test('finds pronouns case insensitively by canonical name', () => {
    const actual = buildPronoun(pronouns, 'They', config, translator);
    expect(actual).toBeDefined();
    expect(actual).toBe(pronouns.they);
});

test('finds pronouns by alias', () => {
    const actual = buildPronoun(pronouns, 'they/them', config, translator);
    expect(actual).toBeDefined();
    expect(actual).toBe(pronouns.they);
});

test('finds pronouns case insensitively by alias', () => {
    const actual = buildPronoun(pronouns, 'They/Them', config, translator);
    expect(actual).toBeDefined();
    expect(actual).toBe(pronouns.they);
});

const emojiPronounsConfig = {
    description: 'Emojiself pronouns',
    history: 'Emojiself pronouns are intended for online communication and not supposed to be pronounced',
    morphemes: {
        pronoun_subject: '#',
        pronoun_object: '#',
        possessive_determiner: '#\'s',
        possessive_pronoun: '#\'s',
        reflexive: '#self',
    },
    examples: ['💫', '💙'],
};

describe('when configured that emojiself pronouns are available', () => {
    beforeEach(() => {
        config.pronouns.emoji = emojiPronounsConfig;
    });

    test('builds pronouns from emoji', () => {
        const actual = buildPronoun(pronouns, '💙', config, translator);
        expect(actual).toEqual(new Pronoun(
            config,
            '💙',
            'Emojiself pronouns',
            false,
            {
                pronoun_subject: '💙',
                pronoun_object: '💙',
                possessive_determiner: '💙\'s',
                possessive_pronoun: '💙\'s',
                reflexive: '💙self',
            },
            [false],
            [false],
            [],
            'Emojiself pronouns are intended for online communication and not supposed to be pronounced@__generator__',
            false,
        ));
    });
});

const nullPronounsConfig: NullPronounsConfig = {
    routes: ['avoiding', 'no-pronouns', 'null', 'pronounless', 'nullpronominal', 'nameself'],
    morphemes: {
        pronoun_subject: '#',
        pronoun_object: '#',
        possessive_determiner: '#\'s',
        possessive_pronoun: '#\'s',
        reflexive: '#self',
    },
    examples: [':S'],
};

describe('when configured that null pronouns are available', () => {
    beforeEach(() => {
        config.pronouns.null = nullPronounsConfig;
        translations.pronouns.null = {
            description: 'Some people prefer not using any pronouns',
        };
    });

    const expectedDescription = '{/avoiding=avoiding} / {/no-pronouns=no-pronouns} / {/null=null} / ' +
        '{/pronounless=pronounless} / {/nullpronominal=nullpronominal} / {/nameself=nameself}';

    test('builds pronouns from name', () => {
        const actual = buildPronoun(pronouns, ':S', config, translator);
        expect(actual).toEqual(new Pronoun(
            config,
            'S',
            expectedDescription,
            false,
            {
                pronoun_subject: 'S',
                pronoun_object: 'S',
                possessive_determiner: 'S\'s',
                possessive_pronoun: 'S\'s',
                reflexive: 'Sself',
            },
            [false],
            [false],
            [],
            'Some people prefer not using any pronouns@__generator__',
            false,
            null,
            null,
            null,
            false,
            true,
        ));
    });
    test('builds nothing if name too long', () => {
        expect(buildPronoun(pronouns, ':Abcdefghijklmnopqrstuvwxyz0123456', config, translator)).toBeNull();
    });

    describe('with conditional placeholders', () => {
        beforeEach(() => {
            nullPronounsConfig.morphemes!.possessive_pronoun = '#/[sxzß]$/i#’|#s';
        });

        test.each(['S', 'Ringelnatz', 'Max', 'X'])('builds morpheme conditionally if name matches', (name) => {
            expect(buildPronoun(pronouns, `:${name}`, config, translator)!.morphemes.possessive_pronoun)
                .toBe(`${name}’`);
        });
        test.each(['Sofi', 'Xavier'])('builds morpheme by default if name does not match', (name) => {
            expect(buildPronoun(pronouns, `:${name}`, config, translator)!.morphemes.possessive_pronoun)
                .toBe(`${name}s`);
        });
    });

    describe('when some morphemes are not defined in template', () => {
        beforeEach(() => {
            nullPronounsConfig.morphemes = {
                pronoun_subject: '#',
                pronoun_object: '#',
                possessive_determiner: '#\'s',
                possessive_pronoun: '#\'s',
            };
        });
        test('they become null', () => {
            const actual = buildPronoun(pronouns, ':S', config, translator);
            expect(actual).toEqual(new Pronoun(
                config,
                'S',
                expectedDescription,
                false,
                {
                    pronoun_subject: 'S',
                    pronoun_object: 'S',
                    possessive_determiner: 'S\'s',
                    possessive_pronoun: 'S\'s',
                    reflexive: null,
                },
                [false],
                [false],
                [],
                'Some people prefer not using any pronouns@__generator__',
                false,
                null,
                null,
                null,
                false,
                true,
            ));
        });
    });
});

describe('when configured that slashes contain all morphemes', () => {
    beforeEach(() => {
        config.pronouns.honorifics = true;
        config.pronouns.generator!.slashes = true;
    });

    test('builds generated pronoun from all morphemes', () => {
        const actual = buildPronoun(pronouns, 'ae/aer/aer/aers/aerself', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aer(config));
    });
    test('unescapes morphemes', () => {
        const actual = buildPronoun(pronouns, 's`/he/hir/hir/hirs/hirself', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.sSlashHe(config));
    });
    test('builds generated pronoun from all required morphemes and plural modifier', () => {
        const actual = buildPronoun(pronouns, 'ae/aer/aer/aers/aerselves/:plural', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerPlural(config));
    });
    test('builds generated pronoun from all required morphemes and plural honorific modifier', () => {
        const actual = buildPronoun(pronouns, 'ae/aer/aer/aers/aerselves/:plural-honorific', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerPluralHonorific(config));
    });
    test('builds generated pronoun from all required morphemes and description', () => {
        const actual = buildPronoun(
            pronouns,
            'ae/aer/aer/aers/aerself/:description=Neopronoun “ae” `/ “æ”',
            config,
            translator,
        );
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerWithDescription(config));
    });
    test('builds generated pronoun from all required morphemes and modifiers', () => {
        const actual = buildPronoun(
            pronouns,
            'ae/aer/:description=Neopronoun “ae” `/ “æ”/:plural/aer/aers/aerselves',
            config,
            translator,
        );
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerPluralWithDescription(config));
    });
    test('builds generated pronoun with some morphemes empty', () => {
        const actual = buildPronoun(pronouns, 'ae/aer/aer/ /aerself', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerWithEmptyPossessivePronoun(config));
    });
    test('builds generated pronoun with morpheme at end empty', () => {
        const actual = buildPronoun(pronouns, 'ae/aer/aer/aers/', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerWithEmptyReflexive(config));
    });
    test('builds generated pronoun with some morphemes unset', () => {
        const actual = buildPronoun(pronouns, 'ae/aer/aer/~/aerself', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerWithUnsetPossessivePronoun(config));
    });
    test('builds nothing if morphemes are missing', () => {
        expect(buildPronoun(pronouns, 'ae/aer/aer/aerself', config, translator)).toBeNull();
    });
    test('builds nothing if too many morphemes are given', () => {
        expect(buildPronoun(pronouns, 'ae/aer/aer/aers/aerself/aer', config, translator)).toBeNull();
    });
    test('builds nothing if description too long', () => {
        expect(buildPronoun(
            pronouns,
            'ae/aer/aer/aers/aerself/:description=Neopronoun “ae” `/ “æ” which is my favorite so you should use it too',
            config,
            translator,
        )).toBeNull();
    });
});
describe('when configured that slashes contain some morphemes', () => {
    beforeEach(() => {
        config.pronouns.generator!.slashes =
            ['pronoun_subject', 'pronoun_object', 'possessive_determiner', 'reflexive'];
    });

    test('builds generated pronoun from all required morphemes', () => {
        const actual = buildPronoun(pronouns, 'ae/aer/aer/aerself', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aerWithUnsetPossessivePronoun(config));
    });
    test('builds nothing if morphemes are missing', () => {
        expect(buildPronoun(pronouns, 'ae/aer/aer', config, translator)).toBeNull();
    });
    test('builds nothing if too many morphemes are given', () => {
        expect(buildPronoun(pronouns, 'ae/aer/aer/aers/aerself', config, translator)).toBeNull();
    });
});
describe('when configured that slashes cannot contain morphemes', () => {
    beforeEach(() => {
        config.pronouns.generator!.slashes = false;
    });

    const pathBase = 'ae/aer/aer/aers/aerself/aer';

    test.each([3, 4, 5, 6])('builds nothing if %d morphemes are given', (count) => {
        const path = pathBase.split('/').slice(0, count)
            .join('/');
        expect(buildPronoun(pronouns, path.slice(0, count), config, translator)).toBeNull();
    });
});

describe('building generated pronouns from commas', () => {
    test('succeeds with all parts present', () => {
        const actual = buildPronoun(pronouns, 'ae,aer,aer,aers,aerself,0,', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aer(config));
    });
    test('succeeds with description missing present', () => {
        const actual = buildPronoun(pronouns, 'ae,aer,aer,aers,aerself,0', config, translator);
        expect(actual).toBeDefined();
        expect(actual).toEqual(generatedPronouns.aer(config));
    });
    test('succeeds with base pronoun and some custom morphemes', () => {
        const actual = buildPronoun(pronouns, 'they,!2,aers,!2,', config, translator);
        expect(actual).toEqual(new Pronoun(
            config,
            'they/them',
            '',
            false,
            {
                pronoun_subject: 'they',
                pronoun_object: 'them',
                possessive_determiner: 'their',
                possessive_pronoun: 'aers',
                reflexive: 'themselves',
            },
            [true],
            [false],
            [],
            '__generator__',
            false,
        ));
    });
    test('fails when too few parts are given', () => {
        expect(buildPronoun(pronouns, 'ae,aer,aer,aers,aerself', config, translator)).toBeNull();
    });
    test('fails when many few parts are given', () => {
        expect(buildPronoun(pronouns, 'ae,aer,aer,aers,aerself,aersing,0,', config, translator)).toBeNull();
    });
    test('fails when base pronoun is unknown', () => {
        expect(buildPronoun(pronouns, 's/he,!2,aers,!2,', config, translator)).toBeNull();
    });
});

describe('builds interchangeable pronouns from ampersand', () => {
    test('two interchangeable pronouns', () => {
        const actual = buildPronoun(pronouns, 'he&she', config, translator);
        expect(actual).toEqual(new Pronoun(
            config,
            'he&she',
            ['Normative “he/him”', 'Normative “she/her”'],
            true,
            {
                pronoun_subject: 'he&she',
                pronoun_object: 'him&her',
                possessive_determiner: 'his&her',
                possessive_pronoun: 'his&hers',
                reflexive: 'himself&herself',
            },
            [false, false],
            [false, false],
            [],
            '',
            false,
        ));
    });
    test('three interchangeable pronouns', () => {
        const actual = buildPronoun(pronouns, 'he&she&they', config, translator);
        expect(actual).toEqual(new Pronoun(
            config,
            'he&she&they',
            ['Normative “he/him”', 'Normative “she/her”', 'Singular “they”'],
            true,
            {
                pronoun_subject: 'he&she&they',
                pronoun_object: 'him&her&them',
                possessive_determiner: 'his&her&their',
                possessive_pronoun: 'his&hers&theirs',
                reflexive: 'himself&herself&themselves',
            },
            [false, false, true],
            [false, false, true],
            [],
            '',
            false,
        ));
    });
});

describe('building the short of a pronoun usage', () => {
    const pronounGroups = [new PronounGroup('Binary forms', ['he', 'she'], null, 'normative')];
    const pronounLibrary = new PronounLibrary(config, pronounGroups, pronouns);

    test('of a canonical pronoun', () => {
        const actual = buildPronounUsage(pronounLibrary, 'she', config, translator);
        expect(actual).toEqual({ short: { options: ['she/her'], glue: ' or ' }, pronoun: pronouns.she });
    });
    test('of a generated pronoun in slash format', () => {
        config.pronouns.honorifics = true;
        config.pronouns.generator!.slashes = true;

        const actual = buildPronounUsage(pronounLibrary, 'ae/aer/aer/aers/aerself', config, translator);
        expect(actual).toEqual({ short: { options: ['ae/aer'], glue: ' or ' }, pronoun: generatedPronouns.aer(config) });
    });
    test('of interchangeable', () => {
        const actual = buildPronounUsage(pronounLibrary, 'he&they', config, translator);
        expect(actual).toMatchObject({ short: { options: ['he/him', 'they/them'], glue: ' or ' } });
    });
    test('of null pronoun', () => {
        config.pronouns.null = nullPronounsConfig;

        const actual = buildPronounUsage(pronounLibrary, ':A', config, translator);
        expect(actual).toMatchObject({ short: { options: ['A/A\'s'], glue: ' or ' } });
    });
    describe('of null route', () => {
        beforeEach(() => {
            config.pronouns.null = nullPronounsConfig;
        });

        test('without specific translation', () => {
            const actual = buildPronounUsage(pronounLibrary, 'avoiding', config, translator);
            expect(actual).toEqual({ short: { options: ['avoiding'] } });
        });
        test('with specific translation', () => {
            translations.pronouns.null = {
                short: {
                    'no-pronouns': 'no pronouns',
                },
            };

            const actual = buildPronounUsage(pronounLibrary, 'no-pronouns', config, translator);
            expect(actual).toEqual({ short: { options: ['no pronouns'] } });
        });
        test('is case insensitive', () => {
            const actual = buildPronounUsage(pronounLibrary, 'Avoiding', config, translator);
            expect(actual).toEqual({ short: { options: ['avoiding'] } });
        });
    });
    test('of emojiself', () => {
        config.pronouns.emoji = emojiPronounsConfig;

        const actual = buildPronounUsage(pronounLibrary, '💫', config, translator);
        expect(actual).toMatchObject({ short: { options: ['💫/💫\'s'] } });
    });
    describe('of mirror pronouns', () => {
        beforeEach(() => {
            config.pronouns.mirror = {
                route: 'mirror',
                name: 'Mirror pronouns / Mirrorpronominal',
                description: 'A person who uses mirror pronouns wants to be referred to with the same pronouns as the person talking.',
                example: [
                    'Person A uses mirror pronouns.',
                    'Person B uses {/she=she/her}, so when she talks about person A, she uses “she/her” to refer to her.',
                    'Person C uses {/ze=ze/hir} interchangeably with {/fae=fæ/fær}, so when ze talks about person A, fæ uses either ze/hir or fæ/fær to refer to fær.',
                ],
            };
        });

        test('without specific translation', () => {
            const actual = buildPronounUsage(pronounLibrary, 'mirror', config, translator);
            expect(actual).toEqual({ short: { options: ['mirror'] } });
        });
        test('with specific translation', () => {
            translations.pronouns.mirror = {
                short: 'mirror pronouns',
            };
            const actual = buildPronounUsage(pronounLibrary, 'mirror', config, translator);
            expect(actual).toEqual({ short: { options: ['mirror pronouns'] } });
        });
        test('is case insensitive', () => {
            const actual = buildPronounUsage(pronounLibrary, 'Mirror', config, translator);
            expect(actual).toEqual({ short: { options: ['mirror'] } });
        });
    });
    describe('of any route', () => {
        test('using route name', () => {
            const actual = buildPronounUsage(pronounLibrary, 'any', config, translator);
            expect(actual).toEqual({ short: { options: ['any'] } });
        });
        test('is case insensitive', () => {
            const actual = buildPronounUsage(pronounLibrary, 'Any', config, translator);
            expect(actual).toEqual({ short: { options: ['any'] } });
        });
    });
    describe('of any group', () => {
        test('without specific translation', () => {
            const actual = buildPronounUsage(pronounLibrary, 'any:normative', config, translator);
            expect(actual).toEqual({ short: { options: ['any normative'] } });
        });
        test('with specific translation', () => {
            translations.pronouns.any.group = {
                normative: {
                    short: 'both binaries',
                },
            };

            const actual = buildPronounUsage(pronounLibrary, 'any:normative', config, translator);
            expect(actual).toEqual({ short: { options: ['both binaries'] } });
        });
        test('is case insensitive', () => {
            const actual = buildPronounUsage(pronounLibrary, 'Any:Normative', config, translator);
            expect(actual).toEqual({ short: { options: ['any normative'] } });
        });
        test('of unknown yields nothing', () => {
            const actual = buildPronounUsage(pronounLibrary, 'any:unknown', config, translator);
            expect(actual).toBeNull();
        });
    });
});