import { useNuxtApp } from 'nuxt/app';
import type { FetchOptions } from 'ofetch';
import { getCurrentInstance, h, render } from 'vue';

import DialogueBox from '../components/DialogueBox.vue';
import type { DialogueMessage } from '../components/DialogueBox.vue';
import type { Color, ModalSize } from '../src/bootstrap.ts';

export default (to: string = 'body') => {
    const { $translator: translator } = useNuxtApp();

    const self = getCurrentInstance()!;

    const show = (
        choice: boolean,
        message: string | DialogueMessage,
        colour: Color,
        value: string | string[] | undefined,
        size: ModalSize,
    ): Promise<string | string[] | undefined> => {
        return new Promise((resolve, reject) => {
            if (typeof message === 'string') {
                message = { message };
            }

            const vnode = h(DialogueBox, {
                choice,
                icon: message.icon || (choice ? 'map-marker-question' : undefined),
                header: message.header,
                message: message.message || (choice ? translator.translate('confirm.header') : undefined),
                margin: message.margin ?? true,
                colour,
                value,
                size: message.size ?? size,
                onConfirm: (value) => {
                    hide();
                    resolve(value);
                },
                onCancel: () => {
                    hide();
                    reject();
                },
            });
            vnode.key = Math.random();
            vnode.appContext = self.appContext;
            render(vnode, document.querySelector(to)!);
        });
    };

    const hide = () => {
        render(null, document.querySelector(to)!);
    };

    const alert = (
        message: string | DialogueMessage,
        color: Color = 'primary',
    ): Promise<void> => {
        return show(false, message, color, undefined, undefined).then(() => undefined);
    };

    const confirm = (
        message: string | DialogueMessage = '',
        colour: Color = 'primary',
    ): Promise<void> => {
        return show(true, message, colour, undefined, undefined).then(() => undefined);
    };

    const editor = (
        value: string | string[],
        message: string | DialogueMessage = '',
        color: Color = 'primary',
    ): Promise<string | string[] | undefined> => {
        return show(false, message, color, value, 'lg');
    };

    const alertRaw = (
        message: string | DialogueMessage,
        color: Color = 'primary',
    ): Promise<void> => {
        return show(false, `<pre class="text-start"><code>${message}</code></pre>`, color, undefined, 'lg').then(() => undefined);
    };

    const postWithAlertOnError = async <T = unknown>(
        url: string,
        data: BodyInit | Record<string, unknown> | null | undefined = undefined,
        options: Omit<FetchOptions, 'method' | 'data' | 'timeout'> = {},
        timeout = 30000,
    ): Promise<T> => {
        return $fetch<T>(url, {
            method: 'POST',
            body: data,
            timeout,
            ...options,
        })
            .catch(async (error) => {
                let errorMessage = translator.translate('error.generic');
                if (typeof error.data?.message === 'string') {
                    errorMessage = error.data.message;
                }
                if (typeof error.data?.error === 'string') {
                    errorMessage = translator.translate(error.data?.error);
                    // in case no translatable key was provided
                    if (errorMessage === undefined) {
                        errorMessage = error.data?.error;
                    }
                }
                await alert(errorMessage, 'danger');
                throw new Error(`POST to ${url} failed: ${error.data?.error || 'unknown error'}`);
            });
    };

    return {
        alert,
        confirm,
        editor,
        alertRaw,
        postWithAlertOnError,
    };
};