import { FastifyPluginAsync } from 'fastify';
import { db } from '../config/database.js';
import { events } from '../db/schema.js';
import { eq } from 'drizzle-orm';

// Fastify JSON schema for event body
const eventBodyJsonSchema = {
  type: 'object',
  required: ['title', 'date', 'description', 'imageUrl', 'displayOrder'],
  properties: {
    title: { type: 'string', minLength: 1, maxLength: 200 },
    date: { type: 'string', minLength: 1, maxLength: 100 },
    description: { type: 'string', minLength: 1 },
    imageUrl: { type: 'string', minLength: 1 },
    displayOrder: { type: 'integer', minimum: 0 },
    isPublished: { type: 'boolean' },
  },
} as const;

const reorderBodyJsonSchema = {
  type: 'object',
  required: ['orders'],
  properties: {
    orders: {
      type: 'array',
      items: {
        type: 'object',
        required: ['id', 'displayOrder'],
        properties: {
          id: { type: 'string' },
          displayOrder: { type: 'integer', minimum: 0 },
        },
      },
    },
  },
} as const;

const eventsRoute: FastifyPluginAsync = async (fastify) => {
  // List all events (by displayOrder)
  fastify.get('/events', { preHandler: [fastify.authenticate] }, async () => {
    const all = await db.select().from(events).orderBy(events.displayOrder);
    return { events: all };
  });

  // Get single event
  fastify.get('/events/:id', { preHandler: [fastify.authenticate] }, async (request, reply) => {
    const { id } = request.params as { id: string };
    const rows = await db.select().from(events).where(eq(events.id, id)).limit(1);
    if (rows.length === 0) return reply.code(404).send({ error: 'Event not found' });
    return { event: rows[0] };
  });

  // Create event
  fastify.post('/events', { schema: { body: eventBodyJsonSchema }, preHandler: [fastify.authenticate] }, async (request, reply) => {
    const data = request.body as any;
    const [row] = await db.insert(events).values(data).returning();
    return reply.code(201).send({ event: row });
  });

  // Update event
  fastify.put('/events/:id', { schema: { body: eventBodyJsonSchema }, preHandler: [fastify.authenticate] }, async (request, reply) => {
    const { id } = request.params as { id: string };
    const data = request.body as any;
    const [row] = await db.update(events).set({ ...data, updatedAt: new Date() }).where(eq(events.id, id)).returning();
    if (!row) return reply.code(404).send({ error: 'Event not found' });
    return { event: row };
  });

  // Delete event
  fastify.delete('/events/:id', { preHandler: [fastify.authenticate] }, async (request, reply) => {
    const { id } = request.params as { id: string };
    const [row] = await db.delete(events).where(eq(events.id, id)).returning();
    if (!row) return reply.code(404).send({ error: 'Event not found' });
    return { message: 'Event deleted successfully' };
  });

  // Reorder events (synchronous transaction for better-sqlite3)
  fastify.put('/events/reorder', { schema: { body: reorderBodyJsonSchema }, preHandler: [fastify.authenticate] }, async (request) => {
    const { orders } = request.body as { orders: Array<{ id: string; displayOrder: number }> };
    db.transaction((tx: any) => {
      for (const { id, displayOrder } of orders) {
        tx.update(events).set({ displayOrder }).where(eq(events.id, id)).run?.();
      }
    });
    return { message: 'Events reordered successfully' };
  });
};

export default eventsRoute;