import { Hono } from 'hono';
import pool from '../../db.js';
import { getCache } from './cache.js';
import { fetchOneOsDailyMileage } from './oneos-api.js';
import { fetchVehicleInfoByPlates } from './vehicle-info.js';
import { filterByPermission, maskCustomerNames } from '../../auth/permissions.js';

const app = new Hono();

app.get('/', async (c) => {
  try {
    const [targets] = await pool.execute(
      'SELECT * FROM lingniu_prod.tab_mileage_assessment_target WHERE is_deleted = 0 ORDER BY id'
    ) as [any[], unknown];

    const [vehicleStats] = await pool.execute(`
      SELECT
        target_id, COUNT(*) as total,
        SUM(today_mileage) as today_total,
        SUM(current_mileage) as cumulative_total,
        AVG(current_year_completion_rate) as avg_completion,
        SUM(CASE WHEN is_qualified = 1 THEN 1 ELSE 0 END) as qualified_count,
        SUM(CASE WHEN current_year_is_qualified = 1 THEN 1 ELSE 0 END) as year_qualified_count,
        SUM(CASE WHEN current_year_completion_rate >= 0.5 THEN 1 ELSE 0 END) as half_qualified_count,
        SUM(current_year_mileage_task) as current_year_target,
        SUM(current_year_mileage) as current_year_completed,
        MAX(current_year_assessment_end_date) as year_end_date
      FROM lingniu_prod.tab_mileage_assessment_vehicle WHERE is_deleted = 0
      GROUP BY target_id
    `) as [any[], unknown];

    const statsMap = new Map<number, any>();
    for (const s of vehicleStats) statsMap.set(s.target_id, s);

    const [firstYearRows] = await pool.execute(`
      SELECT
        v.target_id,
        COUNT(*) as first_year_total,
        SUM(t.annual_mileage_per_vehicle) as first_year_target,
        SUM(LEAST(v.current_mileage, t.annual_mileage_per_vehicle)) as first_year_completed,
        SUM(GREATEST(t.annual_mileage_per_vehicle - v.current_mileage, 0)) as first_year_remaining,
        SUM(LEAST(v.current_mileage, t.annual_mileage_per_vehicle)) / NULLIF(SUM(t.annual_mileage_per_vehicle), 0) as first_year_completion_rate,
        SUM(CASE WHEN v.current_mileage >= t.annual_mileage_per_vehicle THEN 1 ELSE 0 END) as first_year_qualified_count,
        SUM(CASE WHEN v.current_mileage >= t.annual_mileage_per_vehicle * 0.5 THEN 1 ELSE 0 END) as first_year_half_qualified_count,
        DATE_FORMAT(MIN(v.assessment_start_date), '%Y-%m-%d') as first_year_start_date,
        DATE_FORMAT(MAX(DATE_SUB(DATE_ADD(v.assessment_start_date, INTERVAL 1 YEAR), INTERVAL 1 DAY)), '%Y-%m-%d') as first_year_end_date
      FROM lingniu_prod.tab_mileage_assessment_vehicle v
      JOIN lingniu_prod.tab_mileage_assessment_target t ON t.id = v.target_id AND t.is_deleted = 0
      WHERE v.is_deleted = 0
      GROUP BY v.target_id
    `) as [any[], unknown];

    const firstYearMap = new Map<number, any>();
    for (const s of firstYearRows) firstYearMap.set(s.target_id, s);

    const [yearlyRows] = await pool.execute(`
      SELECT
        v.target_id,
        y.year_number,
        COUNT(*) as vehicle_count,
        SUM(t.annual_mileage_per_vehicle * y.year_number) as target_mileage,
        SUM(LEAST(v.current_mileage, t.annual_mileage_per_vehicle * y.year_number)) as completed_mileage,
        SUM(GREATEST(t.annual_mileage_per_vehicle * y.year_number - v.current_mileage, 0)) as remaining_mileage,
        SUM(LEAST(v.current_mileage, t.annual_mileage_per_vehicle * y.year_number))
          / NULLIF(SUM(t.annual_mileage_per_vehicle * y.year_number), 0) as completion_rate,
        SUM(CASE WHEN v.current_mileage >= t.annual_mileage_per_vehicle * y.year_number THEN 1 ELSE 0 END) as qualified_count,
        SUM(CASE WHEN v.current_mileage >= t.annual_mileage_per_vehicle * y.year_number * 0.5 THEN 1 ELSE 0 END) as half_qualified_count,
        DATE_FORMAT(MIN(DATE_ADD(v.assessment_start_date, INTERVAL y.year_number - 1 YEAR)), '%Y-%m-%d') as start_date,
        DATE_FORMAT(MAX(DATE_SUB(DATE_ADD(v.assessment_start_date, INTERVAL y.year_number YEAR), INTERVAL 1 DAY)), '%Y-%m-%d') as end_date
      FROM lingniu_prod.tab_mileage_assessment_vehicle v
      JOIN lingniu_prod.tab_mileage_assessment_target t ON t.id = v.target_id AND t.is_deleted = 0
      JOIN (
        SELECT 1 as year_number UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5
      ) y ON y.year_number <= LEAST(t.assessment_years, v.current_year_number)
      WHERE v.is_deleted = 0
      GROUP BY v.target_id, y.year_number
      ORDER BY v.target_id, y.year_number
    `) as [any[], unknown];

    const yearlyMap = new Map<number, any[]>();
    for (const row of yearlyRows) {
      const list = yearlyMap.get(row.target_id) || [];
      list.push(row);
      yearlyMap.set(row.target_id, list);
    }

    const [yearlyPeriodRows] = await pool.execute(`
      SELECT
        v.target_id,
        y.year_number,
        DATE_FORMAT(DATE_ADD(v.assessment_start_date, INTERVAL y.year_number - 1 YEAR), '%Y-%m-%d') as start_date,
        DATE_FORMAT(DATE_SUB(DATE_ADD(v.assessment_start_date, INTERVAL y.year_number YEAR), INTERVAL 1 DAY), '%Y-%m-%d') as end_date,
        COUNT(*) as cnt
      FROM lingniu_prod.tab_mileage_assessment_vehicle v
      JOIN lingniu_prod.tab_mileage_assessment_target t ON t.id = v.target_id AND t.is_deleted = 0
      JOIN (
        SELECT 1 as year_number UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5
      ) y ON y.year_number <= LEAST(t.assessment_years, v.current_year_number)
      WHERE v.is_deleted = 0
      GROUP BY v.target_id, y.year_number, v.assessment_start_date
      ORDER BY v.target_id, y.year_number, v.assessment_start_date
    `) as [any[], unknown];

    const yearlyPeriodsMap = new Map<string, string[]>();
    for (const row of yearlyPeriodRows) {
      const key = `${row.target_id}-${row.year_number}`;
      const list = yearlyPeriodsMap.get(key) || [];
      list.push(`${row.start_date} ~ ${row.end_date} (${row.cnt}台)`);
      yearlyPeriodsMap.set(key, list);
    }

    const [periodRows] = await pool.execute(`
      SELECT target_id,
             DATE_FORMAT(assessment_start_date, '%Y-%m-%d') as start_date,
             DATE_FORMAT(assessment_end_date, '%Y-%m-%d') as end_date,
             COUNT(*) as cnt
      FROM lingniu_prod.tab_mileage_assessment_vehicle WHERE is_deleted = 0
      GROUP BY target_id, assessment_start_date, assessment_end_date
      ORDER BY target_id, assessment_start_date
    `) as [any[], unknown];

    const periodsMap = new Map<number, string[]>();
    for (const p of periodRows) {
      const list = periodsMap.get(p.target_id) || [];
      list.push(`${p.start_date} ~ ${p.end_date} (${p.cnt}台)`);
      periodsMap.set(p.target_id, list);
    }

    const cache = getCache();
    const cacheVehicleMap = new Map<string, number>();
    if (cache) {
      for (const v of cache.vehicles) {
        cacheVehicleMap.set(v.plate, Math.max(0, v.dailyKm || 0));
      }
    }

    const [targetVehicleRows] = await pool.execute(
      'SELECT target_id, plate_number FROM lingniu_prod.tab_mileage_assessment_vehicle WHERE is_deleted = 0'
    ) as [{ target_id: number; plate_number: string }[], unknown];

    const targetIdPlatesMap = new Map<number, string[]>();
    for (const r of targetVehicleRows) {
      const list = targetIdPlatesMap.get(r.target_id) || [];
      list.push(r.plate_number);
      targetIdPlatesMap.set(r.target_id, list);
    }

    const now = new Date();
    const result = targets.map((t: any) => {
      const s = statsMap.get(t.id) || {};
      const fy = firstYearMap.get(t.id) || {};
      const currentYearTarget = Number(s.current_year_target) || 0;
      const currentYearCompleted = Number(s.current_year_completed) || 0;
      const remaining = Math.max(0, currentYearTarget - currentYearCompleted);
      const yearEnd = s.year_end_date ? new Date(s.year_end_date) : now;
      const daysLeft = Math.max(1, Math.ceil((yearEnd.getTime() - now.getTime()) / 86400000));
      const dailyTarget = remaining / daysLeft;
      const firstYearEnd = fy.first_year_end_date ? new Date(fy.first_year_end_date) : now;
      const firstYearDaysLeft = Math.max(0, Math.ceil((firstYearEnd.getTime() - now.getTime()) / 86400000));
      const firstYearRemaining = Number(fy.first_year_remaining) || 0;
      const firstYearVehicleCount = Number(fy.first_year_total) || 0;
      const firstYearQualifiedCount = Number(fy.first_year_qualified_count) || 0;
      const yearlyAssessments = (yearlyMap.get(t.id) || []).map((row: any) => {
        const vehicleCount = Number(row.vehicle_count) || 0;
        const qualifiedCount = Number(row.qualified_count) || 0;
        const remainingMileage = Number(row.remaining_mileage) || 0;
        const endDate = row.end_date ? new Date(row.end_date) : now;
        const assessmentDaysLeft = Math.max(0, Math.ceil((endDate.getTime() - now.getTime()) / 86400000));
        const yearNumber = Number(row.year_number) || 0;

        return {
          yearNumber,
          label: `第${yearNumber}年`,
          vehicleCount,
          target: Number(row.target_mileage) || 0,
          completed: Number(row.completed_mileage) || 0,
          remaining: remainingMileage,
          completionRate: (Number(row.completion_rate) || 0) * 100,
          qualifiedCount,
          qualifiedRate: vehicleCount > 0 ? (qualifiedCount / vehicleCount) * 100 : 0,
          halfQualifiedCount: Number(row.half_qualified_count) || 0,
          daysLeft: assessmentDaysLeft,
          dailyTarget: assessmentDaysLeft > 0 ? Math.round((remainingMileage / assessmentDaysLeft) * 10) / 10 : 0,
          startDate: row.start_date || null,
          endDate: row.end_date || null,
          periods: yearlyPeriodsMap.get(`${row.target_id}-${row.year_number}`) || [],
        };
      });

      const periods = periodsMap.get(t.id) || [];
      if (periods.length === 0) {
        const startDate = t.default_start_date ? new Date(t.default_start_date).toISOString().split('T')[0] : '';
        const endDate = t.default_end_date ? new Date(t.default_end_date).toISOString().split('T')[0] : '';
        if (startDate || endDate) periods.push(`${startDate} ~ ${endDate}`);
      }

      return {
        id: t.id,
        targetName: t.target_name,
        vehicleCount: Number(s.total) || t.vehicle_count,
        totalMileagePerVehicle: Number(t.total_mileage_per_vehicle),
        annualMileagePerVehicle: Number(t.annual_mileage_per_vehicle),
        assessmentYears: t.assessment_years,
        periods,
        todayTotal: Math.round((targetIdPlatesMap.get(t.id) || []).reduce((sum, plate) => sum + (cacheVehicleMap.get(plate) || 0), 0)),
        cumulativeTotal: Number(s.cumulative_total) || 0,
        avgCompletion: (Number(s.avg_completion) || 0) * 100,
        qualifiedCount: Number(s.qualified_count) || 0,
        yearQualifiedCount: Number(s.year_qualified_count) || 0,
        halfQualifiedCount: Number(s.half_qualified_count) || 0,
        currentYearTarget,
        currentYearCompleted,
        remaining,
        daysLeft,
        dailyTarget: Math.round(dailyTarget * 10) / 10,
        firstYearVehicleCount,
        firstYearTarget: Number(fy.first_year_target) || 0,
        firstYearCompleted: Number(fy.first_year_completed) || 0,
        firstYearRemaining,
        firstYearCompletionRate: (Number(fy.first_year_completion_rate) || 0) * 100,
        firstYearQualifiedCount,
        firstYearQualifiedRate: firstYearVehicleCount > 0 ? (firstYearQualifiedCount / firstYearVehicleCount) * 100 : 0,
        firstYearHalfQualifiedCount: Number(fy.first_year_half_qualified_count) || 0,
        firstYearDaysLeft,
        firstYearDailyTarget: firstYearDaysLeft > 0 ? Math.round((firstYearRemaining / firstYearDaysLeft) * 10) / 10 : 0,
        firstYearStartDate: fy.first_year_start_date || null,
        firstYearEndDate: fy.first_year_end_date || null,
        yearlyAssessments,
      };
    });

    return c.json(result);
  } catch (e: unknown) {
    console.error('targets error:', e);
    return c.json([], 500);
  }
});

app.get('/:id/vehicles', async (c) => {
  const targetId = c.req.param('id');
  const date = c.req.query('date') || '';

  try {
    const [rows] = await pool.execute(
      `SELECT plate_number, today_mileage, vehicle_total_mileage,
              completion_rate, is_qualified, current_year_is_qualified,
              daily_required_mileage
       FROM lingniu_prod.tab_mileage_assessment_vehicle
       WHERE target_id = ? AND is_deleted = 0
       ORDER BY today_mileage DESC`,
      [targetId]
    ) as [any[], unknown];

    const plates: string[] = rows.map((r: any) => r.plate_number);
    const infoMap = await fetchVehicleInfoByPlates(plates);

    const dateMileageMap = new Map<string, { dailyKm: number; totalKm: number | null; isOnline: boolean }>();
    if (date && plates.length > 0) {
      const mileageRows = await fetchOneOsDailyMileage(date, plates);
      for (const m of mileageRows) {
        const existing = dateMileageMap.get(m.plateNumber);
        const dailyKm = m.status === 'NORMAL' ? (Number(m.dailyMileageKm) || 0) : 0;
        if (!existing || dailyKm > existing.dailyKm) {
          dateMileageMap.set(m.plateNumber, {
            dailyKm,
            totalKm: m.totalMileageKm,
            isOnline: m.status === 'NORMAL' && dailyKm > 0,
          });
        }
      }
    }

    const result = rows.map((r: any) => {
      const info = infoMap.get(r.plate_number);
      const dateMileage = date ? dateMileageMap.get(r.plate_number) : null;
      return {
        plateNumber: r.plate_number,
        todayMileage: dateMileage ? dateMileage.dailyKm : (Number(r.today_mileage) || 0),
        totalMileage: dateMileage?.totalKm ?? (Number(r.vehicle_total_mileage) || 0),
        completionRate: Number(r.completion_rate) || 0,
        isQualified: r.is_qualified === 1,
        currentYearIsQualified: r.current_year_is_qualified === 1,
        dailyRequiredMileage: Number(r.daily_required_mileage) || 0,
        rentStatus: info?.rent_status || null,
        department: info?.department || null,
        customer: info?.customer || null,
        isOnline: dateMileage ? dateMileage.isOnline : true,
      };
    });

    const user = (c as any).get('user') as import('../../auth/types.js').AuthUser | undefined;
    const filtered = user ? filterByPermission(result, user) : result;
    return c.json(maskCustomerNames(filtered));
  } catch (e: unknown) {
    console.error('target vehicles error:', e);
    return c.json([], 500);
  }
});

export default app;