<?php

namespace App\Services\AgentSettlement;

use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

final class AgentSettlementBillGuard
{
    private const LOCKED_STATUSES = ['confirmed', 'partial_paid', 'settled', 'overdue', 'reversed'];

    private const PAYABLE_STATUSES = ['confirmed', 'partial_paid', 'overdue'];

    public function __construct(
        private readonly AgentSettlementPeriodCompletionService $periodCompletion,
    ) {}

    public function assertPeriodMutable(int $billId): void
    {
        $periodId = (int) DB::table('settlement_bills')->where('id', $billId)->value('settlement_period_id');
        if ($this->periodCompletion->isPeriodReadOnly($periodId)) {
            throw ValidationException::withMessages([
                'period' => ['completed'],
            ]);
        }
    }

    public function assertNetAmountMutable(int $billId): void
    {
        $bill = DB::table('settlement_bills')->where('id', $billId)->first();
        if ($bill === null) {
            return;
        }

        if (in_array((string) $bill->status, self::LOCKED_STATUSES, true) || $bill->locked_at !== null) {
            throw ValidationException::withMessages([
                'bill' => ['locked'],
            ]);
        }
    }

    public function assertPayable(int $billId): void
    {
        $bill = DB::table('settlement_bills')->where('id', $billId)->first();
        if ($bill === null) {
            throw new \InvalidArgumentException('bill_not_found');
        }

        if (! in_array((string) $bill->status, self::PAYABLE_STATUSES, true)) {
            throw ValidationException::withMessages([
                'bill' => ['not_payable'],
            ]);
        }
    }

    public function markConfirmed(int $billId): void
    {
        $this->assertPeriodMutable($billId);
        $bill = DB::table('settlement_bills')->where('id', $billId)->first();
        if ($bill === null) {
            throw new \InvalidArgumentException('bill_not_found');
        }

        if ((string) $bill->status === 'confirmed') {
            return;
        }

        if ((string) $bill->status !== 'pending_confirm') {
            throw ValidationException::withMessages([
                'bill' => ['not_confirmable'],
            ]);
        }

        DB::table('settlement_bills')->where('id', $billId)->update([
            'status' => 'confirmed',
            'locked_at' => now(),
            'confirmed_at' => now(),
            'updated_at' => now(),
        ]);
    }
}