<?php

namespace Modules\Accounting\Services;

use Illuminate\Support\Facades\DB;
use Modules\Accounting\Entities\AccountingAccount;

class IranianChartOfAccountsService
{
    /**
     * Standard Iranian-style chart skeleton (معین / کل).
     *
     * @return array<int, array{gl_code: string, name: string, account_primary_type: string, children?: array}>
     */
    public function template(): array
    {
        return [
            ['gl_code' => '1', 'name' => 'دارایی‌ها', 'account_primary_type' => 'asset', 'children' => [
                ['gl_code' => '11', 'name' => 'دارایی‌های جاری', 'account_primary_type' => 'asset', 'children' => [
                    ['gl_code' => '1101', 'name' => 'صندوق', 'account_primary_type' => 'asset'],
                    ['gl_code' => '1102', 'name' => 'بانک', 'account_primary_type' => 'asset'],
                    ['gl_code' => '1103', 'name' => 'حساب‌های دریافتنی', 'account_primary_type' => 'asset'],
                    ['gl_code' => '1104', 'name' => 'اسناد دریافتنی', 'account_primary_type' => 'asset'],
                    ['gl_code' => '1105', 'name' => 'موجودی کالا', 'account_primary_type' => 'asset'],
                ]],
                ['gl_code' => '12', 'name' => 'دارایی‌های غیرجاری', 'account_primary_type' => 'asset', 'children' => [
                    ['gl_code' => '1201', 'name' => 'دارایی ثابت', 'account_primary_type' => 'asset'],
                    ['gl_code' => '1202', 'name' => 'استهلاک انباشته', 'account_primary_type' => 'asset'],
                ]],
            ]],
            ['gl_code' => '2', 'name' => 'بدهی‌ها', 'account_primary_type' => 'liability', 'children' => [
                ['gl_code' => '21', 'name' => 'بدهی‌های جاری', 'account_primary_type' => 'liability', 'children' => [
                    ['gl_code' => '2101', 'name' => 'حساب‌های پرداختنی', 'account_primary_type' => 'liability'],
                    ['gl_code' => '2102', 'name' => 'اسناد پرداختنی', 'account_primary_type' => 'liability'],
                    ['gl_code' => '2103', 'name' => 'مالیات پرداختنی', 'account_primary_type' => 'liability'],
                    ['gl_code' => '2104', 'name' => 'وام‌های کوتاه‌مدت', 'account_primary_type' => 'liability'],
                ]],
            ]],
            ['gl_code' => '3', 'name' => 'حقوق صاحبان سهام', 'account_primary_type' => 'equity', 'children' => [
                ['gl_code' => '31', 'name' => 'سرمایه', 'account_primary_type' => 'equity'],
                ['gl_code' => '32', 'name' => 'سود (زیان) انباشته', 'account_primary_type' => 'equity'],
            ]],
            ['gl_code' => '4', 'name' => 'درآمدها', 'account_primary_type' => 'income', 'children' => [
                ['gl_code' => '41', 'name' => 'فروش کالا و خدمات', 'account_primary_type' => 'income'],
                ['gl_code' => '42', 'name' => 'درآمد متفرقه', 'account_primary_type' => 'income'],
            ]],
            ['gl_code' => '5', 'name' => 'هزینه‌ها', 'account_primary_type' => 'expenses', 'children' => [
                ['gl_code' => '51', 'name' => 'بهای تمام‌شده کالای فروش‌رفته', 'account_primary_type' => 'expenses'],
                ['gl_code' => '52', 'name' => 'هزینه‌های اداری و عمومی', 'account_primary_type' => 'expenses'],
                ['gl_code' => '53', 'name' => 'هزینه حقوق و دستمزد', 'account_primary_type' => 'expenses'],
                ['gl_code' => '54', 'name' => 'هزینه استهلاک', 'account_primary_type' => 'expenses'],
            ]],
        ];
    }

    public function seed(int $businessId, int $userId, bool $skipExisting = true): int
    {
        $created = 0;

        DB::transaction(function () use ($businessId, $userId, $skipExisting, &$created) {
            foreach ($this->template() as $node) {
                $created += $this->createNode($businessId, $userId, $node, null, $skipExisting);
            }
        });

        return $created;
    }

    protected function createNode(int $businessId, int $userId, array $node, ?int $parentId, bool $skipExisting): int
    {
        $created = 0;

        if ($skipExisting && AccountingAccount::where('business_id', $businessId)->where('gl_code', $node['gl_code'])->exists()) {
            $accountId = AccountingAccount::where('business_id', $businessId)->where('gl_code', $node['gl_code'])->value('id');
        } else {
            $account = AccountingAccount::create([
                'name' => $node['name'],
                'gl_code' => $node['gl_code'],
                'business_id' => $businessId,
                'account_primary_type' => $node['account_primary_type'],
                'parent_account_id' => $parentId,
                'status' => 'active',
                'created_by' => $userId,
            ]);
            $accountId = $account->id;
            $created++;
        }

        foreach ($node['children'] ?? [] as $child) {
            $created += $this->createNode($businessId, $userId, $child, $accountId, $skipExisting);
        }

        return $created;
    }
}