import { FastifyInstance } from 'fastify';
import { pushService } from '../services/push';
import { z } from 'zod';

export async function notificationRoutes(fastify: FastifyInstance) {
    /**
     * POST /v1/notifications/subscribe
     * Subscribe the current user to push notifications
     */
    fastify.post('/subscribe', async (request, reply) => {
        const bodySchema = z.object({
            subscription: z.object({
                endpoint: z.string(),
                keys: z.object({
                    p256dh: z.string(),
                    auth: z.string()
                })
            })
        });

        const { subscription } = bodySchema.parse(request.body);
        const user = request.user;
        const organizationId = request.organizationId;

        if (!user || !organizationId) {
            return reply.code(401).send({ error: 'Unauthorized' });
        }

        await pushService.subscribe(user.id, organizationId, subscription);

        return { success: true };
    });

    /**
     * POST /v1/notifications/push
     * Send a push notification to a user or organization (internal use, API-key protected)
     */
    fastify.post('/push', async (request, reply) => {
        const bodySchema = z.object({
            userId: z.string().optional(),
            organizationId: z.string().optional(),
            title: z.string(),
            body: z.string(),
            icon: z.string().optional(),
            data: z.record(z.unknown()).optional(),
        });

        const parsed = bodySchema.safeParse(request.body);
        if (!parsed.success) {
            return reply.code(400).send({ error: 'Invalid payload', details: parsed.error.issues });
        }

        const { userId, organizationId, title, body, icon, data } = parsed.data;

        if (!userId && !organizationId) {
            return reply.code(400).send({ error: 'userId or organizationId required' });
        }

        if (userId) {
            if (!organizationId) {
                return reply.code(400).send({ error: 'organizationId required when userId is provided' });
            }
            await pushService.sendToUser(userId, organizationId, title, body, icon, data as Record<string, unknown>);
        } else {
            await pushService.notifyOrganization(organizationId!, title, body, icon);
        }

        return { success: true };
    });

    /**
     * GET /v1/notifications/vapid-key
     * Returns the public VAPID key for the frontend
     */
    fastify.get('/vapid-key', async (_req, reply) => {
        const publicKey = process.env.VAPID_PUBLIC_KEY;
        if (!publicKey) return reply.code(503).send({ error: 'Push notifications not configured' });
        return { publicKey };
    });
}