<?php

namespace App\Services;

use App\Models\InstallmentApplication;
use App\Models\Payment;
use App\Models\PropertyAccount;
use App\Models\Task;
use App\Models\User;
use Illuminate\Support\Facades\DB;

class ReportService
{
    protected function monthExpression(string $column): string
    {
        return DB::connection()->getDriverName() === 'sqlite'
            ? "strftime('%Y-%m', {$column})"
            : "DATE_FORMAT({$column}, '%Y-%m')";
    }

    public function dashboardSummary(): array
    {
        return [
            'new_applications' => InstallmentApplication::whereDate('created_at', today())->count(),
            'approved_applications' => InstallmentApplication::where('status', 'aktif')->count(),
            'failed_applications' => InstallmentApplication::where('status', 'gagal')->count(),
            'cancelled_applications' => InstallmentApplication::where('status', 'batal')->count(),
            'active_accounts' => InstallmentApplication::where('status', 'aktif')->count(),
            'payments_received' => Payment::where('status', 'success')->sum('amount'),
            'outstanding_arrears' => PropertyAccount::sum('tunggakan'),
            'completed_accounts' => InstallmentApplication::where('status', 'selesai')->count(),
            'public_users' => User::whereHas('role', fn ($query) => $query->where('slug', 'public'))->count(),
            'open_tasks' => Task::where('status', 'belum_selesai')->count(),
        ];
    }

    public function monthlyApplications()
    {
        $monthExpression = $this->monthExpression('created_at');

        return InstallmentApplication::selectRaw("{$monthExpression} as month, count(*) as total")
            ->groupBy('month')
            ->orderBy('month')
            ->get();
    }

    public function monthlyPayments()
    {
        $monthExpression = $this->monthExpression('created_at');

        return Payment::where('status', 'success')
            ->selectRaw("{$monthExpression} as month, sum(amount) as total")
            ->groupBy('month')
            ->orderBy('month')
            ->get();
    }

    public function categoryBreakdown()
    {
        return InstallmentApplication::select('category', DB::raw('count(*) as total'))
            ->groupBy('category')
            ->get();
    }

    public function areaBreakdown()
    {
        return PropertyAccount::select('bandar', DB::raw('count(*) as total'))
            ->groupBy('bandar')
            ->orderByDesc('total')
            ->get();
    }

    public function staffPerformance()
    {
        return User::query()
            ->select('users.id', 'users.name')
            ->withCount(['reviewedApplications as total_reviewed'])
            ->whereHas('role', fn ($query) => $query->where('slug', 'staff'))
            ->get();
    }
}