<?php

namespace App\Services;

use App\Enums\OrderChannel;
use App\Enums\OrderStatus;
use App\Enums\PaymentType;
use App\Models\Attendance;
use App\Models\Employee;
use App\Models\EmployeeAdvance;
use App\Models\Expense;
use App\Models\LeaveRequest;
use App\Models\Order;
use App\Models\User;
use Carbon\Carbon;

class DashboardService
{
    public function getAttendanceStats(): array
    {
        $today = Carbon::now()->toDateString();

        $totalEmployees = Employee::whereHas('user', fn ($q) => $q->where('is_active', true))->count();

        $present = Attendance::where('attendance_date', $today)->count();

        $onLeave = LeaveRequest::approved()
            ->where('start_date', '<=', $today)
            ->where('end_date', '>=', $today)
            ->count();

        $absent = max(0, $totalEmployees - $present - $onLeave);

        return [
            'total_employees' => $totalEmployees,
            'present' => $present,
            'absent' => $absent,
            'on_leave' => $onLeave,
            'percentage' => $totalEmployees > 0 ? round(($present / $totalEmployees) * 100) : 0,
        ];
    }

    public function getRevenueSummary(): array
    {
        $today = Carbon::now()->toDateString();

        $stats = Order::where('status', OrderStatus::COMPLETED)
            ->whereDate('created_at', $today)
            ->selectRaw('COUNT(*) as total_orders')
            ->selectRaw('COALESCE(SUM(total_amount), 0) as total_revenue')
            ->selectRaw('COALESCE(SUM(discount), 0) as total_discount')
            ->selectRaw('COALESCE(SUM(total_amount), 0) - COALESCE(SUM(total_amount), 0) as total_marketplace_fees')
            ->selectRaw('COALESCE(SUM(discount), 0) as total_deduction')
            ->first();

        return [
            'total_revenue' => (int) $stats->total_revenue,
            'total_discount' => (int) $stats->total_discount,
            'total_marketplace_fees' => (int) $stats->total_marketplace_fees,
            'total_deduction' => (int) $stats->total_deduction,
            'total_orders' => (int) $stats->total_orders,
            'avg_order' => $stats->total_orders > 0 ? (int) ($stats->total_revenue / $stats->total_orders) : 0,
        ];
    }

    public function getExpenseSummary(): array
    {
        $today = Carbon::now()->toDateString();

        $expenses = Expense::whereDate('created_at', $today)
            ->selectRaw('COALESCE(SUM(amount), 0) as total')
            ->first();

        $cashAdvanceTotal = EmployeeAdvance::where('status', 'paid')
            ->whereDate('created_at', $today)
            ->selectRaw('COALESCE(SUM(amount), 0) as total')
            ->first();

        $expenseTotal = Expense::whereDate('created_at', $today)
            ->selectRaw('COALESCE(SUM(amount), 0) as total')
            ->first();

        return [
            'total' => (int) $expenses->total,
            'purchase_total' => 0,
            'expense_total' => (int) $expenseTotal->total,
            'advance_total' => (int) ($cashAdvanceTotal->total ?? 0),
        ];
    }

    public function getOrderStats(): array
    {
        $today = Carbon::now()->toDateString();
        $baseQuery = Order::where('status', OrderStatus::COMPLETED)
            ->whereDate('created_at', $today);

        $byChannel = collect(OrderChannel::values())->map(function ($channel) use ($baseQuery) {
            $count = (clone $baseQuery)->where('channel', $channel)->count();
            $label = OrderChannel::from($channel)->label();

            return [
                'channel' => $channel,
                'label' => $label,
                'count' => $count,
                'total' => (int) (clone $baseQuery)->where('channel', $channel)->sum('total_amount'),
            ];
        });

        $byPaymentType = collect(PaymentType::values())->map(function ($paymentType) use ($baseQuery) {
            $count = (clone $baseQuery)->where('payment_type', $paymentType)->count();
            $label = PaymentType::from($paymentType)->label();

            return [
                'payment_type' => $paymentType,
                'label' => $label,
                'count' => $count,
                'total' => (int) (clone $baseQuery)->where('payment_type', $paymentType)->sum('total_amount'),
            ];
        });

        $byMarketing = Order::where('status', OrderStatus::COMPLETED)
            ->whereDate('created_at', $today)
            ->whereNotNull('marketing_id')
            ->select('marketing_id')
            ->selectRaw('COUNT(*) as count')
            ->selectRaw('COALESCE(SUM(total_amount), 0) as total')
            ->groupBy('marketing_id')
            ->with('marketing:id')
            ->get()
            ->map(fn ($item) => [
                'name' => $item->marketing?->userProfile->full_name ?? '-',
                'count' => $item->count,
                'total' => (int) $item->total,
            ]);

        $byStatus = collect(OrderStatus::values())->map(function ($status) use ($baseQuery) {
            $count = (clone $baseQuery)->where('status', $status)->count();
            $label = OrderStatus::from($status)->label();

            return [
                'status' => $status,
                'label' => $label,
                'count' => $count,
            ];
        });

        return [
            'by_channel' => $byChannel,
            'by_payment_type' => $byPaymentType,
            'by_marketing' => $byMarketing,
            'by_status' => $byStatus,
        ];
    }

    public function getTodayAttendance(User $user): ?array
    {
        $employee = $user->employee;

        if (! $employee) {
            return null;
        }

        $attendance = Attendance::where('employee_id', $employee->id)
            ->where('attendance_date', now()->toDateString())
            ->first();

        if (! $attendance) {
            return null;
        }

        return [
            'id' => $attendance->id,
            'attendance_date' => $attendance->attendance_date,
            'check_in_at' => $attendance->check_in_at,
            'check_out_at' => $attendance->check_out_at,
            'check_in_photo' => null,
            'check_out_photo' => null,
            'check_in_latitude' => $attendance->check_in_latitude,
            'check_in_longitude' => $attendance->check_in_longitude,
            'check_out_latitude' => $attendance->check_out_latitude,
            'check_out_longitude' => $attendance->check_out_longitude,
            'work_duration_minutes' => $attendance->work_duration_minutes,
        ];
    }

    public function isOnLeave(User $user): bool
    {
        $employee = $user->employee;

        if (! $employee) {
            return false;
        }

        return LeaveRequest::approved()
            ->where('employee_id', $employee->id)
            ->where('start_date', '<=', now()->toDateString())
            ->where('end_date', '>=', now()->toDateString())
            ->exists();
    }
}