<?php

namespace App\Http\Controllers\AIGeneration;

use Illuminate\Routing\Controller as BaseController;
use App\Libs\Utils;
use App\Services\AIGeneration\AIImageGenerationService;
use App\Transformer\AIGeneration\AIGenerationTransformer;
use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Validator;
use App\Libs\ApiResponse;

use App\Consts\BaseConst;

class ImageGenerationController extends BaseController
{
    use ApiResponse;
    private $aiImageGenerationService;

    public function __construct(
        AIImageGenerationService $aiImageGenerationService
    ) {
        $this->aiImageGenerationService = $aiImageGenerationService;
    }

    /**
     * 创建图片生成任务
     *
     * @param Request $request
     * @return JsonResponse
     */
    public function createTask(Request $request): JsonResponse
    {
        $data = $request->all();

        // 首先验证基本参数
        $baseRules = [
            'prompt' => 'required|string|max:2000',
            'width' => 'required|numeric|between:1024,4096',
            'height' => 'required|numeric|between:1024,4096',
            'image_num' => 'required|numeric|between:1,4',
            'scale' => 'required|numeric|between:0,100',
            'model' => 'nullable|string|in:jimeng_4.0,' . implode(',', BaseConst::VOLC_PIC_MODELS),
        ];

        $baseMessages = [
            'prompt.required' => '提示词不能为空',
            'prompt.max' => '提示词不能超过2000个字符',
            'width.required' => '宽不能为空',
            'width.numeric' => '宽必须是数字',
            'width.between' => '宽必须在1024到4096之间',
            'height.required' => '高不能为空',
            'height.numeric' => '高必须是数字',
            'height.between' => '高必须在1024到4096之间',
            'image_num.required' => '生成图片数量不能为空',
            'image_num.numeric' => '生成图片数量必须是数字',
            'image_num.between' => '生成图片数量必须在1到4之间',
            'scale.required' => '缩放比例不能为空',
            'scale.numeric' => '缩放比例必须是数字',
            'scale.between' => '缩放比例必须在0到100之间',
            'model.in' => '模型类型无效',
        ];

        // 根据传入参数决定验证规则
        if (isset($data['ref_img_url'])) {
            // URL 方式 - 支持单个或多个URL（逗号分隔或数组）
            $validationRules = array_merge($baseRules, [
                'ref_img_url' => 'required',
            ]);
            
            $validationMessages = array_merge($baseMessages, [
                'ref_img_url.required' => '参考图片URL不能为空',
            ]);
        } else {
            // 上传文件方式 - 支持多个文件
            $validationRules = array_merge($baseRules, [
                'ref_img_file' => 'required',
                'ref_img_file.*' => 'image|mimes:jpeg,png|max:4800',
            ]);
            
            $validationMessages = array_merge($baseMessages, [
                'ref_img_file.required' => '参考图片不能为空',
                'ref_img_file.*.image' => '参考图片必须是图片文件',
                'ref_img_file.*.mimes' => '参考图片必须是jpeg,png格式',
                'ref_img_file.*.max' => '参考图片大小不能超过4.7MB',
            ]);
        }
        
        $validator = Validator::make($data, $validationRules, $validationMessages);
        
        if ($validator->fails()) {
            Utils::throwError('1002:'.$validator->errors()->first());
        }

        $refImgUrls = [];
        $refImgBase64List = [];

        // 处理上传的图片
        if ($request->hasFile('ref_img_file')) {
            $refImgFiles = is_array($request->file('ref_img_file')) 
                ? $request->file('ref_img_file') 
                : [$request->file('ref_img_file')];
            
            foreach ($refImgFiles as $index => $refImgFile) {
                // 验证图片分辨率和比例
                $refImgInfo = @getimagesize($refImgFile->getPathname());    
                
                if (!$refImgInfo) {
                    Utils::throwError('1003:图片' . ($index + 1) . '格式无效');
                }
                
                $refImg = [
                    'width' => $refImgInfo[0],
                    'height' => $refImgInfo[1],
                    'size' => $refImgFile->getSize(),
                ];
                
                // 验证图片规格
                $this->validateImageSpecs($refImg, $index + 1);
                
                // 上传图片到服务器并获取URL
                $filename = randStr(10) . '.' . $refImgFile->getClientOriginalExtension();
                $uploaded_url = uploadStreamByTos('image', file_get_contents($refImgFile->getPathname()), $filename);
                if (!$uploaded_url) {
                    Utils::throwError('1003:图片' . ($index + 1) . '保存失败');
                }
                $refImgUrls[] = $uploaded_url;
            }

        } else {
            // 使用URL方式，支持逗号分隔的字符串或数组
            $urls = is_array($data['ref_img_url']) 
                ? $data['ref_img_url'] 
                : array_map('trim', explode(',', $data['ref_img_url']));
            
            foreach ($urls as $index => $url) {
                if (empty($url)) {
                    continue;
                }
                
                // 验证URL格式
                if (!filter_var($url, FILTER_VALIDATE_URL)) {
                    Utils::throwError('1003:图片URL' . ($index + 1) . '格式无效');
                }
                
                // 验证远程图片
                $refImg = Utils::getRemoteImageInfo($url, true);
                if (!$refImg) {
                    Utils::throwError('1003:图片' . ($index + 1) . '获取失败');
                }
                
                // 验证图片规格
                $this->validateImageSpecs($refImg, $index + 1);
                
                $refImgUrls[] = $url;
            }
        }
        
        if (empty($refImgUrls)) {
            Utils::throwError('1003:至少需要一张参考图片');
        }
        
        // 将处理后的URL存入data（支持多个）
        $data['ref_img_urls'] = $refImgUrls;
        $data['ref_img_url'] = $refImgUrls[0]; // 保持向后兼容

        try {
            $task = $this->aiImageGenerationService->createImageGenerationTask($data);

            return $this->success(['task_id' => $task->id, 'status' => $task->status]);
        } catch (\Exception $e) {
            Utils::throwError('1001:'.$e->getMessage());
        }
    }

    /**
     * 图片超清（超分辨率）放大
     *
     * 支持传入图片URL或上传图片文件，放大到 1080p / 2k / 4k 或指定宽高。
     * 默认使用 ffmpeg（本地环境或未安装时自动回退 gd）。
     *
     * @param Request $request
     * @return JsonResponse
     */
    public function upscaleImage(Request $request): JsonResponse
    {
        $data = $request->all();

        // 参数验证
        $rules = [
            'image_url'      => 'nullable|string',
            'image_file'     => 'nullable|image|mimes:jpeg,png,webp|max:13312',
            'target_size'    => 'nullable|string|in:1080p,2k,4k',
            'target_width'   => 'nullable|numeric|between:1,8192',
            'target_height'  => 'nullable|numeric|between:1,8192',
            'format'         => 'nullable|string|in:jpg,jpeg,png,webp',
            'quality'        => 'nullable|numeric|between:1,100',
            'sharpen'        => 'nullable|boolean',
            'sharpen_amount' => 'nullable|numeric|between:0,2',
            'driver'         => 'nullable|string|in:gd,ffmpeg',
        ];

        $messages = [
            'image_url.string'         => '图片URL格式不正确',
            'image_file.image'         => '上传文件必须是图片',
            'image_file.mimes'         => '图片格式必须是jpeg、png或webp',
            'image_file.max'           => '图片大小不能超过13MB',
            'target_size.in'           => '目标档位必须是1080p、2k或4k',
            'target_width.numeric'     => '宽度必须是数字',
            'target_width.between'     => '宽度必须在1到8192之间',
            'target_height.numeric'    => '高度必须是数字',
            'target_height.between'    => '高度必须在1到8192之间',
            'format.in'                => '输出格式必须是jpg、png或webp',
            'quality.numeric'          => '输出质量必须是数字',
            'quality.between'          => '输出质量必须在1到100之间',
            'sharpen.boolean'          => 'sharpen必须是布尔值',
            'sharpen_amount.numeric'   => '锐化强度必须是数字',
            'sharpen_amount.between'   => '锐化强度必须在0到2之间',
            'driver.in'                => '处理驱动必须是gd或ffmpeg',
        ];

        $validator = Validator::make($data, $rules, $messages);
        if ($validator->fails()) {
            Utils::throwError('1002:'.$validator->errors()->first());
        }

        // 获取图片URL：优先使用上传文件，其次使用传入URL
        $imageUrl = trim((string)($data['image_url'] ?? ''));
        if ($request->hasFile('image_file')) {
            $imageFile = $request->file('image_file');
            $imageInfo = @getimagesize($imageFile->getPathname());
            if (!$imageInfo) {
                Utils::throwError('1003:图片格式无效');
            }

            // 复用已有图片规格校验
            $this->validateImageSpecs([
                'width'  => $imageInfo[0],
                'height' => $imageInfo[1],
                'size'   => $imageFile->getSize(),
            ], 1);

            $filename = randStr(10) . '.' . $imageFile->getClientOriginalExtension();
            $imageUrl = uploadStreamByTos('image', file_get_contents($imageFile->getPathname()), $filename);
            if (!$imageUrl) {
                Utils::throwError('1003:图片保存失败');
            }
        }

        if ($imageUrl === '') {
            Utils::throwError('1002:image_url或image_file不能为空');
        }
        if (!filter_var($imageUrl, FILTER_VALIDATE_URL)) {
            Utils::throwError('1002:图片URL格式无效');
        }
        // 仅允许 http/https，防止通过API读取服务器本地文件
        $scheme = strtolower((string)parse_url($imageUrl, PHP_URL_SCHEME));
        if (!in_array($scheme, ['http', 'https'], true)) {
            Utils::throwError('1002:图片URL格式无效');
        }

        // 组装超分参数（null 自动走默认值）
        $upscaleParams = [
            'image_url'      => $imageUrl,
            'target'         => $data['target_size'] ?? null,
            'width'          => isset($data['target_width']) ? (int)$data['target_width'] : null,
            'height'         => isset($data['target_height']) ? (int)$data['target_height'] : null,
            'format'         => $data['format'] ?? null,
            'quality'        => isset($data['quality']) ? (int)$data['quality'] : null,
            'sharpen'        => isset($data['sharpen']) ? filter_var($data['sharpen'], FILTER_VALIDATE_BOOLEAN) : null,
            'sharpen_amount' => isset($data['sharpen_amount']) ? (float)$data['sharpen_amount'] : null,
            'driver'         => $data['driver'] ?? null,
        ];

        try {
            $result = upscaleImage($upscaleParams);

            return $this->success([
                'url'        => $result['url'],
                'width'      => $result['width'],
                'height'     => $result['height'],
                'src_width'  => $result['src_width'],
                'src_height' => $result['src_height'],
                'upscaled'   => $result['upscaled'],
                'driver'     => $result['driver'],
            ]);
        } catch (\Exception $e) {
            Utils::throwError('1001:'.$e->getMessage());
        }
    }

    /**
     * 验证图片规格
     * 
     * @param array $refImg
     * @param int $index
     * @return void
     */
    private function validateImageSpecs(array $refImg, int $index): void
    {
        // 判断图片是否满足以下条件:
        // 1.图片文件最大4.7MB
        // 2.图片分辨率最大: 4096*4096, 最短边不低于320
        // 3.图片长边与短边比例在3以内
        if ($refImg['size'] > 13 * 1024 * 1024) {
            Utils::throwError('1003:图片' . $index . '大小不能超过10MB');
        }
        
        $minDimension = min($refImg['width'], $refImg['height']);
        $maxDimension = max($refImg['width'], $refImg['height']);
        
        if ($maxDimension > 4096 || $minDimension < 320) {
            Utils::throwError('1003:图片' . $index . '分辨率不能超过4096*4096，且最短边不能低于320');
        }
        
        if ($maxDimension / $minDimension > 3) {
            Utils::throwError('1003:图片' . $index . '长边与短边比例不能超过3');
        }
    }

    /**
     * 查询任务状态
     *
     * @param string $taskId
     * @return JsonResponse
     */
    public function taskStatus(string $taskId): JsonResponse
    {
        $task = \App\Models\MpGeneratePicTask::where('id', $taskId)->first();

        if (!$task) {
            return response()->json([
                'success' => false,
                'message' => '任务不存在'
            ], 404);
        }

        return response()->json([
            'success' => true,
            'data' => [
                'task_id' => $task->id,
                'status' => $task->status,
                'result_url' => $task->result_url,
                'error_message' => $task->error_message,
                'created_at' => $task->created_at,
                'started_at' => $task->started_at,
                'completed_at' => $task->completed_at
            ]
        ]);
    }

    /**
     * 获取任务列表
     *
     * @param Request $request
     * @return mixed
     */
    public function taskList(Request $request)
    {
        $data = $request->all();

        $result = $this->aiImageGenerationService->getTaskList($data);
        return $this->success($result, [new AIGenerationTransformer(), 'newBuildTaskList']);
    }

    /**
     * 批量上传图片或视频
     *
     * @param Request $request
     * @return void
     */
    public function batchUploadImg(Request $request) {
        $refImgUrls = [];
        $refVideoUrls = [];
        
        // 处理上传的图片文件
        if ($request->hasFile('ref_img_file')) {
            $refImgFiles = is_array($request->file('ref_img_file')) 
                ? $request->file('ref_img_file') 
                : [$request->file('ref_img_file')];
            
            foreach ($refImgFiles as $index => $refImgFile) {
                // 验证图片分辨率和比例
                $refImgInfo = @getimagesize($refImgFile->getPathname());
                
                if (!$refImgInfo) {
                    Utils::throwError('1003:图片' . ($index + 1) . '格式无效');
                }
                
                $refImg = [
                    'width' => $refImgInfo[0],
                    'height' => $refImgInfo[1],
                    'size' => $refImgFile->getSize(),
                ];
                
                // 验证图片规格
                $this->validateImageSpecs($refImg, $index + 1);
                
                // 上传图片到服务器并获取URL
                $filename = randStr(10) . '.' . $refImgFile->getClientOriginalExtension();
                $uploaded_url = uploadStreamByTos('image', file_get_contents($refImgFile->getPathname()), $filename);
                if (!$uploaded_url) {
                    Utils::throwError('1003:图片' . ($index + 1) . '保存失败');
                }
                $refImgUrls[] = $uploaded_url;
            }
        }
        
        // 处理图片二进制内容（ref_img数组）
        if ($request->has('ref_img')) {
            $refImgs = $request->input('ref_img');
            
            // 确保是数组格式
            if (!is_array($refImgs)) {
                $refImgs = [$refImgs];
            }
            
            foreach ($refImgs as $index => $refImgBinary) {
                $tempFile = null;
                $tempPath = null;
                
                try {
                    // 解码base64（如果是base64格式）
                    if (preg_match('/^data:image\/(\w+);base64,/', $refImgBinary, $matches)) {
                        $refImgBinary = base64_decode(substr($refImgBinary, strpos($refImgBinary, ',') + 1));
                    }
                    
                    // 创建临时文件以验证图片
                    $tempFile = tmpfile();
                    $tempPath = stream_get_meta_data($tempFile)['uri'];
                    fwrite($tempFile, $refImgBinary);
                    
                    // 验证图片分辨率和比例
                    $refImgInfo = @getimagesize($tempPath);
                    
                    if (!$refImgInfo) {
                        Utils::throwError('1003:图片' . ($index + 1) . '格式无效');
                    }
                    
                    $refImg = [
                        'width' => $refImgInfo[0],
                        'height' => $refImgInfo[1],
                        'size' => strlen($refImgBinary),
                    ];
                    
                    // 验证图片规格
                    $this->validateImageSpecs($refImg, $index + 1);
                    
                    // 上传图片到服务器并获取URL（默认使用.jpg格式）
                    $filename = randStr(10) . '.jpg';
                    $uploaded_url = uploadStreamByTos('image', $refImgBinary, $filename);
                    if (!$uploaded_url) {
                        Utils::throwError('1003:图片' . ($index + 1) . '保存失败');
                    }
                    $refImgUrls[] = $uploaded_url;
                } finally {
                    // 确保临时文件被关闭和删除
                    if ($tempFile) {
                        fclose($tempFile);
                    }
                }
            }
        }

        // 处理上传的视频文件
        if ($request->hasFile('ref_video_file')) {
            $refVideoFiles = is_array($request->file('ref_video_file')) 
                ? $request->file('ref_video_file') 
                : [$request->file('ref_video_file')];
            
            foreach ($refVideoFiles as $index => $refVideoFile) {
                // 验证视频文件大小（最大100MB）
                if ($refVideoFile->getSize() > 100 * 1024 * 1024) {
                    Utils::throwError('1003:视频' . ($index + 1) . '大小不能超过100MB');
                }
                
                // 验证视频文件类型
                $allowedMimeTypes = ['video/mp4', 'video/mpeg', 'video/quicktime', 'video/x-msvideo'];
                if (!in_array($refVideoFile->getMimeType(), $allowedMimeTypes)) {
                    Utils::throwError('1003:视频' . ($index + 1) . '格式无效，仅支持mp4、mpeg、mov、avi格式');
                }
                
                // 上传视频到服务器并获取URL
                $filename = randStr(10) . '.' . $refVideoFile->getClientOriginalExtension();
                $uploaded_url = uploadStreamByTos('video', file_get_contents($refVideoFile->getPathname()), $filename);
                if (!$uploaded_url) {
                    Utils::throwError('1003:视频' . ($index + 1) . '保存失败');
                }
                $refVideoUrls[] = $uploaded_url;
            }
        }

        // 处理视频二进制内容（ref_video数组）
        if ($request->has('ref_video')) {
            $refVideos = $request->input('ref_video');
            
            // 确保是数组格式
            if (!is_array($refVideos)) {
                $refVideos = [$refVideos];
            }
            
            foreach ($refVideos as $index => $refVideoBinary) {
                try {
                    // 解码base64（如果是base64格式）
                    if (preg_match('/^data:video\/(\w+);base64,/', $refVideoBinary, $matches)) {
                        $extension = $matches[1];
                        $refVideoBinary = base64_decode(substr($refVideoBinary, strpos($refVideoBinary, ',') + 1));
                    } else {
                        $extension = 'mp4'; // 默认扩展名
                    }
                    
                    // 验证视频大小（最大100MB）
                    if (strlen($refVideoBinary) > 100 * 1024 * 1024) {
                        Utils::throwError('1003:视频' . ($index + 1) . '大小不能超过100MB');
                    }
                    
                    // 上传视频到服务器并获取URL
                    $filename = randStr(10) . '.' . $extension;
                    $uploaded_url = uploadStreamByTos('video', $refVideoBinary, $filename);
                    if (!$uploaded_url) {
                        Utils::throwError('1003:视频' . ($index + 1) . '保存失败');
                    }
                    $refVideoUrls[] = $uploaded_url;
                } catch (\Exception $e) {
                    Utils::throwError('1003:视频' . ($index + 1) . '处理失败：' . $e->getMessage());
                }
            }
        }

        return $this->success([
            'image_urls' => $refImgUrls,
            'video_urls' => $refVideoUrls
        ]);
    }
}