import * as db from '../../db/articleproperty.js';
import { emit } from '../sse.js';

function requireSelectedCompany(req) {
    const companyId = req.user?.selectedCompanyId;
    if (companyId == null) {
        return { error: 'No company selected' };
    }
    return { companyId };
}

function parseSku(value) {
    const sku = typeof value === 'string' ? value.trim() : '';
    if (!sku) return { error: 'sku is required' };
    return { sku: decodeURIComponent(sku) };
}

function emitArticleSignal(req, sku) {
    const companyId = req.user?.selectedCompanyId;
    if (companyId == null) return;
    emit(`article-${sku}`, { companyId });
}

function articlePropertyErrorStatus(error) {
    if (error.message === 'No company selected') return 400;
    if (error.message === 'Not authorized') return 403;
    if (error.message === 'Company not found' || error.message === 'Article not found') return 404;
    if (error.message?.startsWith('Property not found')) return 404;
    if (error.message?.startsWith('Exclusive property cannot be overwritten')) return 409;
    if (error.message === 'Invalid properties array' || error.message === 'Invalid propertyId' || error.message === 'Duplicate propertyId') return 400;
    return 500;
}

/**
 * Registers articleproperty routes under `/article/:sku/property`.
 * @param {import('express').Application} app
 * @param {string} [basePath='']
 */
export function register(app, basePath = '') {
    /**
     * @openapi
     * /article/{sku}/property:
     *   get:
     *     tags: [Article]
     *     summary: List article properties
     *     description: Fetches all free-form properties set on an article.
     *     security:
     *       - cookieAuth: []
     *     parameters:
     *       - in: path
     *         name: sku
     *         required: true
     *         schema:
     *           type: string
     *         description: Article SKU
     *     responses:
     *       200:
     *         description: List of properties for this article
     *         content:
     *           application/json:
     *             schema:
     *               type: object
     *               properties:
     *                 properties:
     *                   type: array
     *                   items:
     *                     $ref: '#/components/schemas/ArticleProperty'
     *   put:
     *     tags: [Article]
     *     summary: Bulk set article properties
     *     description: Replaces all properties for an article.
     *     security:
     *       - cookieAuth: []
     *     parameters:
     *       - in: path
     *         name: sku
     *         required: true
     *         schema:
     *           type: string
     *         description: Article SKU
     *     requestBody:
     *       required: true
     *       content:
     *         application/json:
     *           schema:
     *             type: object
     *             required: [properties]
     *             properties:
     *               properties:
     *                 type: array
     *                 items:
     *                   type: object
     *                   required: [propertyId, value]
     *                   properties:
     *                     propertyId:
     *                       type: integer
     *                     value:
     *                       type: string
     *                     sort:
     *                       type: integer
     *     responses:
     *       200:
     *         description: Updated article properties
     *         content:
     *           application/json:
     *             schema:
     *               type: object
     *               properties:
     *                 properties:
     *                   type: array
     *                   items:
     *                     $ref: '#/components/schemas/ArticleProperty'
     */
    app.get(`${basePath}/article/:sku/property`, async (req, res) => {
        const selected = requireSelectedCompany(req);
        if (selected.error) {
            return res.status(400).json({ error: selected.error });
        }

        const skuParsed = parseSku(req.params.sku);
        if (skuParsed.error) {
            return res.status(400).json({ error: skuParsed.error });
        }

        try {
            const properties = await db.listByArticleSku(req.user.id, skuParsed.sku);
            res.json({ properties });
        } catch (error) {
            res.status(articlePropertyErrorStatus(error)).json({ error: error.message });
        }
    });

    app.put(`${basePath}/article/:sku/property`, async (req, res) => {
        const selected = requireSelectedCompany(req);
        if (selected.error) {
            return res.status(400).json({ error: selected.error });
        }

        const skuParsed = parseSku(req.params.sku);
        if (skuParsed.error) {
            return res.status(400).json({ error: skuParsed.error });
        }

        const propertiesInput = req.body?.properties ?? req.body;
        if (!Array.isArray(propertiesInput)) {
            return res.status(400).json({ error: 'properties array required' });
        }

        try {
            const properties = await db.setByArticleSku(req.user.id, skuParsed.sku, propertiesInput);
            emitArticleSignal(req, skuParsed.sku);
            res.json({ properties });
        } catch (error) {
            res.status(articlePropertyErrorStatus(error)).json({ error: error.message });
        }
    });

    /**
     * @openapi
     * /article/{sku}/property/{propertyId}:
     *   delete:
     *     tags: [Article]
     *     summary: Delete article property
     *     description: Removes a single property from an article.
     *     security:
     *       - cookieAuth: []
     *     parameters:
     *       - in: path
     *         name: sku
     *         required: true
     *         schema:
     *           type: string
     *       - in: path
     *         name: propertyId
     *         required: true
     *         schema:
     *           type: integer
     *     responses:
     *       200:
     *         description: Deleted successfully
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/SuccessResponse'
     */
    app.delete(`${basePath}/article/:sku/property/:propertyId`, async (req, res) => {
        const selected = requireSelectedCompany(req);
        if (selected.error) {
            return res.status(400).json({ error: selected.error });
        }

        const skuParsed = parseSku(req.params.sku);
        if (skuParsed.error) {
            return res.status(400).json({ error: skuParsed.error });
        }

        try {
            const propertyId = Number(req.params.propertyId);
            await db.remove(req.user.id, skuParsed.sku, propertyId);
            emitArticleSignal(req, skuParsed.sku);
            res.json({ ok: true });
        } catch (error) {
            res.status(articlePropertyErrorStatus(error)).json({ error: error.message });
        }
    });
}