<?php

namespace App\Service;

use App\BaseApp\BaseService;
use App\Models\ai\AiApiKeyModel;
use App\Models\ai\AiPlatformModel;
use App\Service\common\ai\AiGenerationLogService;
use App\Service\common\ai\AiRuntimeConfigService;
use App\Service\common\FieldEncryptService;

/**
 * AI 配置管理 Service：密钥 CRUD + 运行时选项读写
 * 平台/模型以种子数据为主，密钥需后台录入后才能真正调用
 */
class AiConfigService extends BaseService
{
    public function __construct()
    {
        parent::__construct();
        $this->model = AiApiKeyModel::class;
        $this->selectField = ['id', 'platform_id', 'name', 'remark', 'is_default', 'status', 'sort', 'created_at', 'updated_at'];
        $this->queryField = [
            'platform_id' => '=',
            'name' => 'like',
            'status' => '=',
        ];
        $this->orderBy = [
            'name' => 'sort',
            'sort' => 'desc',
        ];
    }

    /**
     * 获取 AI 管理页选项（平台卡片 + 当前激活组合）
     */
    public function getRuntimeOptions(): array
    {
        return AiRuntimeConfigService::getInstance()->optionsForConfig();
    }

    /**
     * 保存默认平台/模型/密钥
     */
    public function saveRuntime(array $params): array
    {
        $provider = (string) ($params['provider'] ?? '');
        $model = (string) ($params['model'] ?? '');
        $apiKeyId = (int) ($params['api_key_id'] ?? 0);
        return AiRuntimeConfigService::getInstance()->saveActiveConfig($provider, $model, $apiKeyId);
    }

    /**
     * 密钥列表（卡片展示用，不返回明文密钥）
     * 直接查表，避免单例 where 被 update 污染导致列表为空
     */
    public function listKeys(): array
    {
        $items = AiApiKeyModel::where('deleted_at', 0)
            ->orderByDesc('sort')
            ->orderByDesc('id')
            ->get(['id', 'platform_id', 'name', 'remark', 'is_default', 'status', 'sort', 'api_key', 'created_at', 'updated_at'])
            ->toArray();
        $platforms = AiPlatformModel::where('deleted_at', 0)
            ->get(['id', 'code', 'name', 'logo'])
            ->keyBy('id')
            ->toArray();
        foreach ($items as &$item) {
            $pid = (int) ($item['platform_id'] ?? 0);
            $item['platform'] = $platforms[$pid] ?? null;
            $item['has_key'] = trim((string) ($item['api_key'] ?? '')) !== '';
            unset($item['api_key']);
        }
        unset($item);
        return [
            'page' => 1,
            'size' => count($items),
            'page_count' => 1,
            'total' => count($items),
            'items' => $items,
        ];
    }

    /**
     * 平台下拉（密钥表单用）
     */
    public function platformOptions(): array
    {
        return AiPlatformModel::where('deleted_at', 0)
            ->where('status', 1)
            ->orderByDesc('sort')
            ->orderBy('id')
            ->get(['id', 'code', 'name', 'logo'])
            ->toArray();
    }

    /**
     * 新增密钥（明文入库前加密）
     */
    public function createKey(array $params): mixed
    {
        $platformId = (int) ($params['platform_id'] ?? 0);
        $name = trim((string) ($params['name'] ?? ''));
        $apiKey = trim((string) ($params['api_key'] ?? ''));
        if ($platformId <= 0) {
            $this->utils->errorThrow('请选择所属平台');
        }
        if ($name === '') {
            $this->utils->errorThrow('请填写密钥别名');
        }
        if ($apiKey === '') {
            $this->utils->errorThrow('请填写 API Key');
        }
        $platform = AiPlatformModel::where('id', $platformId)
            ->where('deleted_at', 0)
            ->first();
        if (!$platform) {
            $this->utils->errorThrow('平台不存在');
        }
        $isDefault = (int) ($params['is_default'] ?? 0);
        if ($isDefault === 1) {
            // 同平台只保留一个默认密钥
            AiApiKeyModel::where('platform_id', $platformId)
                ->where('deleted_at', 0)
                ->update(['is_default' => 0, 'updated_at' => time()]);
        }
        return $this->insert([
            'platform_id' => $platformId,
            'name' => $name,
            'api_key' => FieldEncryptService::getInstance()->encryptForStorage($apiKey),
            'remark' => trim((string) ($params['remark'] ?? '')),
            'is_default' => $isDefault,
            'status' => (int) ($params['status'] ?? 1),
            'sort' => (int) ($params['sort'] ?? 0),
            'created_at' => time(),
            'updated_at' => 0,
            'deleted_at' => 0,
        ]);
    }

    /**
     * 更新密钥；api_key 为空表示不改密钥本身
     */
    public function updateKey(int $id, array $params): mixed
    {
        $info = AiApiKeyModel::where('id', $id)->where('deleted_at', 0)->first();
        if (!$info) {
            $this->utils->notFound('密钥不存在');
        }
        $data = [];
        if (array_key_exists('name', $params)) {
            $name = trim((string) $params['name']);
            if ($name === '') {
                $this->utils->errorThrow('密钥别名不能为空');
            }
            $data['name'] = $name;
        }
        if (array_key_exists('remark', $params)) {
            $data['remark'] = trim((string) $params['remark']);
        }
        if (array_key_exists('status', $params)) {
            $data['status'] = (int) $params['status'];
        }
        if (array_key_exists('sort', $params)) {
            $data['sort'] = (int) $params['sort'];
        }
        if (array_key_exists('platform_id', $params)) {
            $platformId = (int) $params['platform_id'];
            if ($platformId <= 0) {
                $this->utils->errorThrow('请选择所属平台');
            }
            $data['platform_id'] = $platformId;
        }
        $platformId = (int) ($data['platform_id'] ?? $info->platform_id);
        if (array_key_exists('is_default', $params)) {
            $isDefault = (int) $params['is_default'];
            $data['is_default'] = $isDefault;
            if ($isDefault === 1) {
                AiApiKeyModel::where('platform_id', $platformId)
                    ->where('deleted_at', 0)
                    ->where('id', '<>', $id)
                    ->update(['is_default' => 0, 'updated_at' => time()]);
            }
        }
        $apiKey = trim((string) ($params['api_key'] ?? ''));
        if ($apiKey !== '') {
            $data['api_key'] = FieldEncryptService::getInstance()->encryptForStorage($apiKey);
        }
        if (empty($data)) {
            return true;
        }
        $data['updated_at'] = time();
        // 直接 update，避免 BaseService::save 污染单例 where 导致后续列表为空
        return AiApiKeyModel::where('id', $id)->where('deleted_at', 0)->update($data);
    }

    /**
     * 软删除密钥
     */
    public function deleteKeys(array $ids): mixed
    {
        $ids = array_values(array_filter(array_map('intval', $ids)));
        if (empty($ids)) {
            $this->utils->errorThrow('参数错误');
        }
        return AiApiKeyModel::whereIn('id', $ids)->where('deleted_at', 0)->update([
            'deleted_at' => time(),
            'updated_at' => time(),
        ]);
    }

    /**
     * AI 生成历史列表
     */
    public function generationList(): array
    {
        return AiGenerationLogService::getInstance()->getPageListForAdmin();
    }

    /**
     * AI 生成历史详情
     */
    public function generationDetail(int $id): array
    {
        return AiGenerationLogService::getInstance()->getDetailForAdmin($id);
    }
}