/**
 * 일정 라우트
 * GET: 공개, POST/PUT/DELETE: 인증 필요
 */
import suggestionsRoutes from './suggestions.js';

export default async function schedulesRoutes(fastify) {
  const { db } = fastify;

  // 추천 검색어 라우트 등록
  fastify.register(suggestionsRoutes, { prefix: '/suggestions' });

  /**
   * GET /api/schedules
   * 월별 일정 목록 조회
   * @query year - 년도 (필수)
   * @query month - 월 (필수)
   */
  fastify.get('/', {
    schema: {
      tags: ['schedules'],
      summary: '월별 일정 목록 조회',
      querystring: {
        type: 'object',
        required: ['year', 'month'],
        properties: {
          year: { type: 'integer', description: '년도' },
          month: { type: 'integer', minimum: 1, maximum: 12, description: '월' },
        },
      },
    },
  }, async (request, reply) => {
    const { year, month } = request.query;

    if (!year || !month) {
      return reply.code(400).send({ error: 'year와 month는 필수입니다.' });
    }

    const startDate = `${year}-${String(month).padStart(2, '0')}-01`;
    const endDate = new Date(year, month, 0).toISOString().split('T')[0];

    const [schedules] = await db.query(`
      SELECT
        s.id,
        s.title,
        s.date,
        s.time,
        s.category_id,
        c.name as category_name,
        c.color as category_color,
        sy.channel_name as source_name
      FROM schedules s
      LEFT JOIN schedule_categories c ON s.category_id = c.id
      LEFT JOIN schedule_youtube sy ON s.id = sy.schedule_id
      WHERE s.date BETWEEN ? AND ?
      ORDER BY s.date ASC, s.time ASC
    `, [startDate, endDate]);

    // 날짜별로 그룹화
    const grouped = {};

    for (const s of schedules) {
      const dateKey = s.date.toISOString().split('T')[0];

      if (!grouped[dateKey]) {
        grouped[dateKey] = {
          categories: [],
          schedules: [],
        };
      }

      // 일정 추가
      const schedule = {
        id: s.id,
        title: s.title,
        time: s.time,
        category: {
          id: s.category_id,
          name: s.category_name,
          color: s.category_color,
        },
      };
      if (s.source_name) {
        schedule.source_name = s.source_name;
      }
      grouped[dateKey].schedules.push(schedule);

      // 카테고리 카운트
      const existingCategory = grouped[dateKey].categories.find(c => c.id === s.category_id);
      if (existingCategory) {
        existingCategory.count++;
      } else {
        grouped[dateKey].categories.push({
          id: s.category_id,
          name: s.category_name,
          color: s.category_color,
          count: 1,
        });
      }
    }

    return grouped;
  });

  /**
   * GET /api/schedules/:id
   * 일정 상세 조회
   */
  fastify.get('/:id', {
    schema: {
      tags: ['schedules'],
      summary: '일정 상세 조회',
    },
  }, async (request, reply) => {
    const { id } = request.params;

    const [schedules] = await db.query(`
      SELECT
        s.*,
        c.name as category_name,
        c.color as category_color,
        sy.channel_name as source_name
      FROM schedules s
      LEFT JOIN schedule_categories c ON s.category_id = c.id
      LEFT JOIN schedule_youtube sy ON s.id = sy.schedule_id
      WHERE s.id = ?
    `, [id]);

    if (schedules.length === 0) {
      return reply.code(404).send({ error: '일정을 찾을 수 없습니다.' });
    }

    const s = schedules[0];
    const result = {
      id: s.id,
      title: s.title,
      date: s.date,
      time: s.time,
      category: {
        id: s.category_id,
        name: s.category_name,
        color: s.category_color,
      },
      created_at: s.created_at,
      updated_at: s.updated_at,
    };
    if (s.source_name) {
      result.source_name = s.source_name;
    }
    return result;
  });
}