<?php

namespace App\Services\Finance;

use App\Enums\EmployeeAdvanceStatus;
use App\Enums\Role;
use App\Models\EmployeeAdvance;
use App\Models\User;
use App\Services\Concerns\ResolvesAuthEmployee;
use App\Services\System\PushNotificationService;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\DB;

class EmployeeAdvanceService
{
    use ResolvesAuthEmployee;

    public function __construct(
        private readonly CashService $cashService,
        private readonly PushNotificationService $pushNotificationService,
    ) {}

    /**
     * @return array{outstanding_amount: int, outstanding_amount_formatted: string, outstanding_count: int}
     */
    public function outstandingSummary(?User $user = null): array
    {
        $query = EmployeeAdvance::approved()
            ->when(! $user->hasAnyRole([Role::OWNER->value, Role::DEVELOPER->value, Role::DIREKTUR->value]), fn (Builder $query) => $query->where('employee_id', $user->employee?->id ?? -1));

        $outstandingAmount = (int) $query->sum('amount');

        $outstandingCount = $query->count();

        return [
            'outstanding_amount' => $outstandingAmount,
            'outstanding_amount_formatted' => 'Rp '.number_format($outstandingAmount, 0, ',', '.'),
            'outstanding_count' => $outstandingCount,
        ];
    }

    /**
     * @param  array{search: string, sort: string, direction: 'asc'|'desc'}  $tableQuery
     */
    public function paginateForIndex(array $tableQuery, User $user, string $status = ''): LengthAwarePaginator
    {
        $query = EmployeeAdvance::query()
            ->with(['employee.user.profile', 'rejection'])
            ->when(! $user->hasAnyRole([Role::OWNER->value, Role::DEVELOPER->value, Role::DIREKTUR->value]), function (Builder $query) use ($user): void {
                $employeeId = $user->employee?->id ?? -1;
                $query->where('employee_id', $employeeId);
            })
            ->when($status !== '', fn (Builder $query) => $query->where('status', $status))
            ->when($tableQuery['search'] !== '', function (Builder $query) use ($tableQuery): void {
                $search = $tableQuery['search'];
                $query->where(function (Builder $query) use ($search): void {
                    $query->where('description', 'like', "%{$search}%")
                        ->orWhereHas('employee.user.profile', fn (Builder $query) => $query->where('full_name', 'like', "%{$search}%"))
                        ->orWhereHas('employee.user', fn (Builder $query) => $query->where('username', 'like', "%{$search}%"))
                        ->orWhereHas('rejection', fn (Builder $query) => $query->where('reason', 'like', "%{$search}%"));
                });
            });

        $this->applySorting($query, $tableQuery['sort'], $tableQuery['direction']);

        return $query
            ->paginate(10)
            ->withQueryString();
    }

    /**
     * @param  array{amount: int, description: string, due_date: string}  $validated
     */
    public function create(array $validated, User $user): void
    {
        $employee = $this->resolveAuthEmployee($user);

        $employeeAdvance = DB::transaction(function () use ($validated, $employee) {
            return EmployeeAdvance::create([
                'employee_id' => $employee->id,
                'amount' => (int) $validated['amount'],
                'description' => $validated['description'],
                'due_date' => $validated['due_date'],
                'status' => EmployeeAdvanceStatus::PENDING,
            ]);
        });

        $this->pushNotificationService->sendToRoles(
            '💰 Pengajuan Kasbon Baru',
            "Karyawan {$user->profil?->full_name} mengajukan kasbon sebesar {$employeeAdvance->amount_formatted} dengan keterangan: {$employeeAdvance->description}.",
            ['owner', 'developer'],
            '/admin/finance/employee-advances',
        );
    }

    /**
     * @param  array{amount: int, description: string, due_date: string}  $validated
     */
    public function update(EmployeeAdvance $employeeAdvance, array $validated, User $user): void
    {
        DB::transaction(function () use ($employeeAdvance, $validated): void {
            $employeeAdvance->update([
                'amount' => (int) $validated['amount'],
                'description' => $validated['description'],
                'due_date' => $validated['due_date'],
            ]);
        });

        $this->pushNotificationService->sendToRoles(
            '✏️ Kasbon Diperbarui',
            "Kasbon sebesar {$employeeAdvance->amount_formatted} telah diperbarui oleh {$user->profile?->full_name}.",
            ['owner', 'developer'],
            '/admin/finance/employee-advances',
        );
    }

    public function delete(EmployeeAdvance $employeeAdvance, User $user): void
    {
        $amount = $employeeAdvance->amount_formatted;
        $description = $employeeAdvance->description;

        $employeeAdvance->delete();

        $this->pushNotificationService->sendToRoles(
            '🗑️ Kasbon Dihapus',
            "Kasbon sebesar {$amount} dengan keterangan {$description} telah dihapus.",
            ['owner', 'developer'],
            '/admin/finance/employee-advances',
        );
    }

    public function approve(EmployeeAdvance $employeeAdvance, User $user): void
    {
        DB::transaction(function () use ($employeeAdvance, $user): void {
            $employeeAdvance->loadMissing('employee.user.profile');

            $description = sprintf(
                'Pencairan kasbon: %s',
                $employeeAdvance->employeeName,
            );

            $cashTransaction = $this->cashService->recordOutgoing(
                $employeeAdvance,
                $employeeAdvance->amount,
                $description,
                $user,
            );

            $employeeAdvance->update([
                'cash_transaction_id' => $cashTransaction->id,
                'status' => EmployeeAdvanceStatus::APPROVED,
                'verified_at' => now(),
                'verified_by_id' => $user->id,
            ]);
        });

        $employeeAdvance->loadMissing('employee.user');
        if ($employeeAdvance->employee?->user_id) {
            $this->pushNotificationService->sendToUser(
                '💰 Kasbon Disetujui',
                "Pengajuan kasbon Anda sebesar {$employeeAdvance->amount_formatted} telah disetujui.",
                $employeeAdvance->employee->user_id,
                '/admin/finance/employee-advances',
            );
        }
    }

    public function reject(EmployeeAdvance $employeeAdvance, string $reason, User $user): void
    {
        DB::transaction(function () use ($employeeAdvance, $user, $reason): void {
            $employeeAdvance->update([
                'status' => EmployeeAdvanceStatus::REJECTED,
                'verified_at' => now(),
                'verified_by_id' => $user->id,
            ]);

            $employeeAdvance->rejection()->create([
                'reason' => $reason,
                'rejected_by_id' => $user->id,
            ]);
        });

        $employeeAdvance->loadMissing('employee.user');
        if ($employeeAdvance->employee?->user_id) {
            $this->pushNotificationService->sendToUser(
                '💰 Kasbon Ditolak',
                "Pengajuan kasbon Anda sebesar {$employeeAdvance->amount_formatted} ditolak dengan alasan: {$reason}.",
                $employeeAdvance->employee->user_id,
                '/admin/finance/employee-advances',
            );
        }
    }

    public function pay(EmployeeAdvance $employeeAdvance, User $user): void
    {
        DB::transaction(function () use ($employeeAdvance, $user): void {
            $employeeAdvance->loadMissing('employee.user.profile');

            $description = sprintf(
                'Pelunasan kasbon: %s',
                $employeeAdvance->employeeName,
            );

            $cashTransaction = $this->cashService->recordIncoming(
                $employeeAdvance,
                $employeeAdvance->amount,
                $description,
                $user,
            );

            $employeeAdvance->update([
                'repayment_cash_transaction_id' => $cashTransaction->id,
                'paid_at' => now(),
                'paid_by_id' => $user->id,
                'status' => EmployeeAdvanceStatus::PAID,
            ]);
        });
    }

    private function applySorting(Builder $query, string $sort, string $direction): void
    {
        if (in_array($sort, ['created_at', 'amount', 'due_date', 'status', 'description'], true)) {
            $query->orderBy($sort, $direction);

            return;
        }

        $query->latest();
    }
}