import * as db from '../../db/attributename.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 attributeErrorStatus(error) {
    if (error.message === 'No company selected') return 400;
    if (error.message === 'Not authorized') return 403;
    if (error.message === 'Company not found') return 404;
    if (error.message === 'Attribute name not found') return 404;
    if (error.message === 'Name required') return 400;
    if (error.message === 'Invalid attribute name order') return 400;
    if (error.message === 'Invalid id') return 400;
    if (error.message === 'Attribute name already exists') return 409;
    if (error.message === 'Attribute name in use' || error.message?.includes('FOREIGN KEY constraint')) return 409;
    return 500;
}

/**
 * Registers attributename routes.
 * @param {import('express').Application} app
 * @param {string} [basePath='']
 */
export function register(app, basePath = '') {
    /**
     * @openapi
     * /attributename:
     *   get:
     *     tags: [Article]
     *     summary: List attribute names
     *     description: Lists all attribute names defined for the selected company, including nested values. Each attribute name includes `articleCount` (the number of parent articles configured with this attribute) and each value includes `articleCount` (the number of articles having this attribute value).
     *     security:
     *       - cookieAuth: []
     *     responses:
     *       200:
     *         description: List of attribute names
     *         content:
     *           application/json:
     *             schema:
     *               type: object
     *               properties:
     *                 attributenames:
     *                   type: array
     *                   items:
     *                     $ref: '#/components/schemas/Attributename'
     *   post:
     *     tags: [Article]
     *     summary: Create attribute name
     *     description: Creates an attribute name for the selected company.
     *     security:
     *       - cookieAuth: []
     *     x-signals: [attributename]
     *     requestBody:
     *       required: true
     *       content:
     *         application/json:
     *           schema:
     *             type: object
     *             required: [name]
     *             properties:
     *               name:
     *                 type: string
     *               sort:
     *                 type: integer
     *               exclusive:
     *                 type: boolean
     *     responses:
     *       201:
     *         description: Created attribute name
     *         content:
     *           application/json:
     *             schema:
     *               type: object
     *               properties:
     *                 attributename:
     *                   $ref: '#/components/schemas/Attributename'
     */
    app.get(`${basePath}/attributename`, async (req, res) => {
        const selected = requireSelectedCompany(req);
        if (selected.error) {
            return res.status(400).json({ error: selected.error });
        }

        try {
            const attributenames = await db.list(req.user.id);
            res.json({ attributenames });
        } catch (error) {
            res.status(attributeErrorStatus(error)).json({ error: error.message });
        }
    });

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

        try {
            const attributename = await db.create(req.user.id, req.body ?? {});
            emit('attributename', { companyId: selected.companyId });
            res.status(201).json({ attributename });
        } catch (error) {
            res.status(attributeErrorStatus(error)).json({ error: error.message });
        }
    });

    /**
     * @openapi
     * /attributename/order:
     *   put:
     *     tags: [Article]
     *     summary: Reorder attribute names
     *     description: Updates the display sort order of attribute names for the selected company.
     *     security:
     *       - cookieAuth: []
     *     x-signals: [attributename]
     *     requestBody:
     *       required: true
     *       content:
     *         application/json:
     *           schema:
     *             type: object
     *             required: [attributenameIds]
     *             properties:
     *               attributenameIds:
     *                 type: array
     *                 items:
     *                   type: integer
     *     responses:
     *       200:
     *         description: Reordered successfully
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/SuccessResponse'
     */
    app.put(`${basePath}/attributename/order`, async (req, res) => {
        const selected = requireSelectedCompany(req);
        if (selected.error) {
            return res.status(400).json({ error: selected.error });
        }

        try {
            await db.order(req.user.id, req.body ?? {});
            emit('attributename', { companyId: selected.companyId });
            res.json({ ok: true });
        } catch (error) {
            res.status(attributeErrorStatus(error)).json({ error: error.message });
        }
    });

    /**
     * @openapi
     * /attributename/{id}:
     *   patch:
     *     tags: [Article]
     *     summary: Update attribute name
     *     description: Updates name, sort, and/or exclusive flag for an attribute name.
     *     security:
     *       - cookieAuth: []
     *     x-signals: [attributename]
     *     parameters:
     *       - in: path
     *         name: id
     *         required: true
     *         schema:
     *           type: integer
     *     requestBody:
     *       required: true
     *       content:
     *         application/json:
     *           schema:
     *             type: object
     *             properties:
     *               name:
     *                 type: string
     *               sort:
     *                 type: integer
     *               exclusive:
     *                 type: boolean
     *     responses:
     *       200:
     *         description: Updated attribute name
     *         content:
     *           application/json:
     *             schema:
     *               type: object
     *               properties:
     *                 attributename:
     *                   $ref: '#/components/schemas/Attributename'
     *   delete:
     *     tags: [Article]
     *     summary: Delete attribute name
     *     description: Deletes an attribute name and cascades to attribute values and article assignments.
     *     security:
     *       - cookieAuth: []
     *     x-signals: [attributename]
     *     parameters:
     *       - in: path
     *         name: id
     *         required: true
     *         schema:
     *           type: integer
     *     responses:
     *       200:
     *         description: Deleted successfully
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/SuccessResponse'
     *       400:
     *         description: Bad request or no company selected
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/Error'
     *       401:
     *         description: Unauthorized
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/Error'
     *       403:
     *         description: Forbidden
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/Error'
     *       404:
     *         description: Attribute name not found
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/Error'
     *       409:
     *         description: Attribute name in use
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/Error'
     *       500:
     *         description: Server error
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/Error'
     */
    app.patch(`${basePath}/attributename/:id`, async (req, res) => {
        const selected = requireSelectedCompany(req);
        if (selected.error) {
            return res.status(400).json({ error: selected.error });
        }

        try {
            const id = Number(req.params.id);
            const attributename = await db.update(req.user.id, id, req.body ?? {});
            emit('attributename', { companyId: selected.companyId });
            res.json({ attributename });
        } catch (error) {
            const status = attributeErrorStatus(error);
            if (status === 500) console.error('Update attribute name failed:', error);
            res.status(status).json({ error: error.message });
        }
    });

    app.delete(`${basePath}/attributename/:id`, async (req, res) => {
        const selected = requireSelectedCompany(req);
        if (selected.error) {
            return res.status(400).json({ error: selected.error });
        }

        try {
            const id = Number(req.params.id);
            await db.remove(req.user.id, id);
            emit('attributename', { companyId: selected.companyId });
            res.json({ ok: true });
        } catch (error) {
            const status = attributeErrorStatus(error);
            const message = (error.message === 'Attribute name in use' || error.message?.includes('FOREIGN KEY constraint'))
                ? 'Attribute name in use'
                : error.message;
            if (status === 500) console.error('Delete attribute name failed:', error);
            res.status(status).json({ error: message });
        }
    });
}