<?php

namespace App\Services\Report;

use App\Models\DailyCollectionStat;
use App\Models\MonthlyStoreSale;
use App\Models\WeeklyRoutePerformance;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\DB;

class Aggregator
{
    /**
     * Recompute daily_collection_stats for a single date. Idempotent.
     * Groups by barangay (derived via DOP -> barangay).
     */
    public function rebuildDailyCollectionStats(\DateTimeInterface $date): int
    {
        $day = Carbon::parse($date)->toDateString();

        $rows = DB::table('collection_logs')
            ->join('drop_off_points', 'collection_logs.drop_off_point_id', '=', 'drop_off_points.id')
            ->whereDate('collection_logs.scanned_at', $day)
            ->where('collection_logs.verification_status', 'valid')
            ->groupBy('drop_off_points.barangay_id')
            ->selectRaw('
                drop_off_points.barangay_id as barangay_id,
                COUNT(*) as total_scans,
                COALESCE(SUM(collection_logs.weight_kg), 0) as total_weight_kg,
                COUNT(DISTINCT collection_logs.household_id) as unique_households
            ')
            ->get();

        DailyCollectionStat::where('date', $day)->delete();

        $count = 0;
        foreach ($rows as $r) {
            DailyCollectionStat::create([
                'date' => $day,
                'barangay_id' => $r->barangay_id,
                'total_scans' => (int) $r->total_scans,
                'total_weight_kg' => (int) $r->total_weight_kg,
                'unique_households' => (int) $r->unique_households,
                'missed_pickups' => 0, // populated by trip-stop analysis below in future
            ]);
            $count++;
        }

        return $count;
    }

    /**
     * Recompute weekly_route_performance for the week containing $date.
     */
    public function rebuildWeeklyRoutePerformance(\DateTimeInterface $date): int
    {
        $weekStart = Carbon::parse($date)->startOfWeek()->toDateString();
        $weekEnd = Carbon::parse($date)->endOfWeek()->toDateString();

        $rows = DB::table('trips')
            ->whereBetween('scheduled_date', [$weekStart, $weekEnd])
            ->whereIn('status', ['completed', 'cancelled'])
            ->groupBy('route_id')
            ->selectRaw('
                route_id,
                COUNT(*) as trips_count,
                SUM(CASE WHEN status = "completed" THEN 1 ELSE 0 END) as completed_count,
                AVG(CASE
                    WHEN actual_end_time IS NOT NULL AND actual_start_time IS NOT NULL
                    THEN TIMESTAMPDIFF(MINUTE, actual_start_time, actual_end_time)
                    ELSE NULL
                END) as avg_minutes,
                SUM(CASE
                    WHEN status = "completed"
                         AND actual_start_time IS NOT NULL
                         AND scheduled_start_time IS NOT NULL
                         AND TIMESTAMPDIFF(
                             MINUTE,
                             TIMESTAMP(scheduled_date, scheduled_start_time),
                             actual_start_time
                         ) <= 15
                    THEN 1 ELSE 0
                END) as on_time_count
            ')
            ->get();

        WeeklyRoutePerformance::where('week_start_date', $weekStart)->delete();

        $count = 0;
        foreach ($rows as $r) {
            WeeklyRoutePerformance::create([
                'week_start_date' => $weekStart,
                'route_id' => $r->route_id,
                'on_time_rate_percent' => $r->trips_count > 0
                    ? (int) round(($r->on_time_count / $r->trips_count) * 100)
                    : 0,
                'avg_trip_duration_minutes' => (int) round((float) ($r->avg_minutes ?? 0)),
                'completion_rate_percent' => $r->trips_count > 0
                    ? (int) round(($r->completed_count / $r->trips_count) * 100)
                    : 0,
                'trips_count' => (int) $r->trips_count,
            ]);
            $count++;
        }

        return $count;
    }

    /**
     * Recompute monthly_store_sales for the month containing $date.
     */
    public function rebuildMonthlyStoreSales(\DateTimeInterface $date): int
    {
        $monthStart = Carbon::parse($date)->startOfMonth()->toDateString();
        $monthEnd = Carbon::parse($date)->endOfMonth()->toDateString();

        $rows = DB::table('store_sales')
            ->whereBetween('sold_at', [$monthStart.' 00:00:00', $monthEnd.' 23:59:59'])
            ->groupBy('store_id')
            ->selectRaw('
                store_id,
                SUM(quantity) as qty,
                SUM(retail_price_centavos) as retail,
                SUM(commission_centavos) as commission
            ')
            ->get();

        MonthlyStoreSale::where('month_start_date', $monthStart)->delete();

        $count = 0;
        foreach ($rows as $r) {
            MonthlyStoreSale::create([
                'month_start_date' => $monthStart,
                'store_id' => $r->store_id,
                'total_quantity_sold' => (int) $r->qty,
                'total_retail_centavos' => (int) $r->retail,
                'total_commission_centavos' => (int) $r->commission,
            ]);
            $count++;
        }

        return $count;
    }
}