<?php

namespace App\Services\Admin\Product;

use App\Repositories\Admin\Product\AdminSaleCodeRepository;
use App\Services\Admin\AdminAuditService;
use Illuminate\Support\Facades\DB;

final class AdminSaleCodeService
{
    public function __construct(
        private readonly AdminSaleCodeRepository $repo,
        private readonly AdminAuditService $audit,
    ) {}

    /**
     * 화면 출력용 트리 구조 생성 (연동사 -> 하위 상품코드)
     */
    public function getGroupedTree(): array
    {
        $providers = $this->repo->getAllProviders();
        $codes = $this->repo->getAllCodes();

        $tree = [];
        foreach ($providers as $p) {
            $p['children'] = [];
            $tree[$p['id']] = $p;
        }

        foreach ($codes as $c) {
            if (isset($tree[$c['provider_id']])) {
                $tree[$c['provider_id']]['children'][] = $c;
            }
        }

        return array_values($tree);
    }

    // --- Provider ---
    public function storeProvider(array $input, int $actorAdminId, string $ip, string $ua): array
    {
        try {
            return DB::transaction(function () use ($input, $actorAdminId, $ip, $ua) {
                $data = [
                    'code'       => strtoupper(trim($input['code'])),
                    'name'       => trim($input['name']),
                    'is_active'  => (int)$input['is_active'],
                    'sort_order' => 0,
                ];

                $newId = $this->repo->insertProvider($data);
                $this->audit->log($actorAdminId, 'admin.sale_code.provider.create', 'api_provider', $newId, null, $data, $ip, $ua);

                return ['ok' => true, 'message' => '연동사가 등록되었습니다.'];
            });
        } catch (\Throwable $e) {
            return ['ok' => false, 'message' => '연동사 코드가 중복되거나 저장 오류가 발생했습니다.'];
        }
    }

    public function updateProvider(int $id, array $input, int $actorAdminId, string $ip, string $ua): array
    {
        try {
            return DB::transaction(function () use ($id, $input, $actorAdminId, $ip, $ua) {
                $before = $this->repo->findProvider($id);
                if (!$before) return ['ok' => false, 'message' => '연동사를 찾을 수 없습니다.'];

                $data = [
                    'name'      => trim($input['name']),
                    'is_active' => (int)$input['is_active'],
                ];

                $this->repo->updateProvider($id, $data);
                $this->audit->log($actorAdminId, 'admin.sale_code.provider.update', 'api_provider', $id, (array)$before, array_merge((array)$before, $data), $ip, $ua);

                return ['ok' => true, 'message' => '연동사가 수정되었습니다.'];
            });
        } catch (\Throwable $e) {
            return ['ok' => false, 'message' => '수정 중 오류가 발생했습니다.'];
        }
    }

    public function deleteProvider(int $id, int $actorAdminId, string $ip, string $ua): array
    {
        $before = $this->repo->findProvider($id);
        if (!$before) return ['ok' => false, 'message' => '존재하지 않는 연동사입니다.'];

        if ($this->repo->countCodesByProvider($id) > 0) {
            return ['ok' => false, 'message' => '하위 상품 코드가 존재하여 삭제할 수 없습니다. 상품 코드를 먼저 삭제해주세요.'];
        }

        $this->repo->deleteProvider($id);
        $this->audit->log($actorAdminId, 'admin.sale_code.provider.delete', 'api_provider', $id, (array)$before, null, $ip, $ua);

        return ['ok' => true, 'message' => '삭제되었습니다.'];
    }

    // --- Product Code ---
    public function storeCode(array $input, int $actorAdminId, string $ip, string $ua): array
    {
        try {
            return DB::transaction(function () use ($input, $actorAdminId, $ip, $ua) {
                $data = [
                    'provider_id' => (int)$input['provider_id'],
                    'api_code'    => strtoupper(trim($input['api_code'])),
                    'name'        => trim($input['name']),
                    'is_active'   => (int)$input['is_active'],
                    'sort_order'  => 0,
                ];

                $newId = $this->repo->insertCode($data);
                $this->audit->log($actorAdminId, 'admin.sale_code.code.create', 'api_code', $newId, null, $data, $ip, $ua);

                return ['ok' => true, 'message' => '상품 코드가 등록되었습니다.'];
            });
        } catch (\Throwable $e) {
            return ['ok' => false, 'message' => '해당 연동사에 중복된 코드가 있거나 저장 오류가 발생했습니다.'];
        }
    }

    public function updateCode(int $id, array $input, int $actorAdminId, string $ip, string $ua): array
    {
        try {
            return DB::transaction(function () use ($id, $input, $actorAdminId, $ip, $ua) {
                $before = $this->repo->findCode($id);
                if (!$before) return ['ok' => false, 'message' => '상품 코드를 찾을 수 없습니다.'];

                $data = [
                    'provider_id' => (int)$input['provider_id'],
                    'api_code'    => strtoupper(trim($input['api_code'])),
                    'name'        => trim($input['name']),
                    'is_active'   => (int)$input['is_active'],
                ];

                $this->repo->updateCode($id, $data);
                $this->audit->log($actorAdminId, 'admin.sale_code.code.update', 'api_code', $id, (array)$before, array_merge((array)$before, $data), $ip, $ua);

                return ['ok' => true, 'message' => '상품 코드가 수정되었습니다.'];
            });
        } catch (\Throwable $e) {
            return ['ok' => false, 'message' => '수정 중 중복 오류가 발생했습니다.'];
        }
    }

    public function updateCodeSort(array $ids, int $actorAdminId): array
    {
        try {
            DB::transaction(function () use ($ids) {
                foreach ($ids as $index => $id) {
                    $this->repo->updateCodeSortOrder((int)$id, $index + 1);
                }
            });
            return ['ok' => true];
        } catch (\Throwable $e) {
            return ['ok' => false, 'message' => '정렬 중 오류가 발생했습니다.'];
        }
    }

    public function deleteCode(int $id, int $actorAdminId, string $ip, string $ua): array
    {
        $before = $this->repo->findCode($id);
        if (!$before) return ['ok' => false, 'message' => '상품 코드를 찾을 수 없습니다.'];

        $this->repo->deleteCode($id);
        $this->audit->log($actorAdminId, 'admin.sale_code.code.delete', 'api_code', $id, (array)$before, null, $ip, $ua);

        return ['ok' => true, 'message' => '상품 코드가 삭제되었습니다.'];
    }
}