// 画布服务层
import type { CanvasProject, CanvasState, CanvasNode } from '@/types/canvas';

// API 响应类型
interface ApiResponse<T = any> {
  success: boolean;
  data?: T;
  error?: string;
}

// 画布服务
export const canvasService = {
  // 获取画布列表
  async getProjects(): Promise<ApiResponse<CanvasProject[]>> {
    try {
      const response = await fetch('/api/canvas');
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '获取画布列表失败' };
    }
  },

  // 获取单个画布
  async getProject(id: string): Promise<ApiResponse<CanvasProject>> {
    try {
      const response = await fetch(`/api/canvas/${id}`);
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '获取画布失败' };
    }
  },

  // 创建画布
  async createProject(project: Partial<CanvasProject>): Promise<ApiResponse<CanvasProject>> {
    try {
      const response = await fetch('/api/canvas', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(project),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '创建画布失败' };
    }
  },

  // 更新画布
  async updateProject(id: string, updates: Partial<CanvasProject>): Promise<ApiResponse<CanvasProject>> {
    try {
      const response = await fetch(`/api/canvas/${id}`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(updates),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '更新画布失败' };
    }
  },

  // 删除画布
  async deleteProject(id: string): Promise<ApiResponse> {
    try {
      const response = await fetch(`/api/canvas/${id}`, {
        method: 'DELETE',
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '删除画布失败' };
    }
  },

  // 保存画布状态
  async saveCanvasState(id: string, canvasData: CanvasState): Promise<ApiResponse> {
    try {
      const response = await fetch(`/api/canvas/${id}`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ canvasData }),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '保存画布状态失败' };
    }
  },

  // 自动保存（防抖）
  createAutoSave(projectId: string, delay = 2000) {
    let timeoutId: NodeJS.Timeout | null = null;
    
    return (canvasData: CanvasState) => {
      if (timeoutId) {
        clearTimeout(timeoutId);
      }
      
      timeoutId = setTimeout(async () => {
        await this.saveCanvasState(projectId, canvasData);
      }, delay);
    };
  },
};

// 图片生成服务
export const imageGenerationService = {
  // 上传图片到存储桶
  async uploadImage(file: File): Promise<ApiResponse<{ url: string; pathname: string }>> {
    try {
      const formData = new FormData();
      formData.append('file', file);
      
      const response = await fetch('/api/files/upload', {
        method: 'POST',
        body: formData,
      });
      
      if (!response.ok) {
        const errorData = await response.json();
        return { success: false, error: errorData.error || '上传失败' };
      }
      
      const data = await response.json();
      return { 
        success: true, 
        data: { 
          url: data.url, 
          pathname: data.pathname 
        } 
      };
    } catch (error) {
      console.error('[Canvas] 图片上传失败:', error);
      return { success: false, error: '图片上传失败' };
    }
  },

  // AI 生成图片
  async generateImage(params: {
    prompt: string;
    negativePrompt?: string;
    model?: string;
    aspectRatio?: string;
    imageCount?: number;
    referenceImage?: string;
  }): Promise<ApiResponse<{ images: Array<{ thumbnailUrl: string; originalUrl: string }>; model?: string; prompt?: string }>> {
    try {
      const response = await fetch('/api/canvas/generate/image', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(params),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '生成图片失败' };
    }
  },

  // 图片抠图 - 使用图片URL
  async removeBackground(imageUrl: string): Promise<ApiResponse<{ url: string }>> {
    try {
      const response = await fetch('/api/rmbg', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ imageUrl }), // 使用 imageUrl 参数
      });
      const data = await response.json();
      if (data.success && data.original_url) {
        return { success: true, data: { url: data.original_url } };
      }
      return { success: false, error: data.error || '抠图失败' };
    } catch (error) {
      console.error('[Canvas] 抠图失败:', error);
      return { success: false, error: '抠图失败' };
    }
  },

  // 图片增强 - 使用图片URL
  async enhanceImage(imageUrl: string): Promise<ApiResponse<{ url: string }>> {
    try {
      const response = await fetch('/api/enhance', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ imageUrl }), // 使用 imageUrl 参数
      });
      const data = await response.json();
      if (data.success && data.original_url) {
        return { success: true, data: { url: data.original_url } };
      }
      return { success: false, error: data.error || '图片增强失败' };
    } catch (error) {
      console.error('[Canvas] 图片增强失败:', error);
      return { success: false, error: '图片增强失败' };
    }
  },

  // 图片扩展 - 使用图片URL
  async extendImage(imageUrl: string, direction?: string): Promise<ApiResponse<{ url: string }>> {
    try {
      const response = await fetch('/api/extend', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ image_url: imageUrl, direction }), // extend API 使用 image_url 参数名
      });
      const data = await response.json();
      if (data.success && data.original_url) {
        return { success: true, data: { url: data.original_url } };
      }
      return { success: false, error: data.error || '图片扩展失败' };
    } catch (error) {
      console.error('[Canvas] 图片扩展失败:', error);
      return { success: false, error: '图片扩展失败' };
    }
  },

  // 尺寸调整
  async resizeImage(imageUrl: string, width: number, height: number): Promise<ApiResponse<{ url: string }>> {
    try {
      const response = await fetch('/api/resize', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ imageUrl, width, height }),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '尺寸调整失败' };
    }
  },

  // 角度编辑
  async editAngle(params: {
    imageUrl: string;
    horizontalAngle: number;
    verticalAngle: number;
    zoom: number;
  }): Promise<ApiResponse<{ url: string }>> {
    try {
      const response = await fetch('/api/angle-edit', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(params),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '角度编辑失败' };
    }
  },

  // 场景裂变
  async sceneFusion(params: {
    productImage: string;
    backgroundImages: string[];
    productName?: string;
  }): Promise<ApiResponse<{ urls: string[] }>> {
    try {
      const response = await fetch('/api/scene-fusion', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(params),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '场景裂变失败' };
    }
  },
};

// 视频生成服务
export const videoGenerationService = {
  // 生成视频
  async generateVideo(params: {
    prompt: string;
    model: string;
    referenceImage?: string;
    duration?: number;
  }): Promise<ApiResponse<{ url: string }>> {
    try {
      const response = await fetch('/api/canvas/generate/video', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(params),
      });
      const data = await response.json();
      return data;
    } catch (error) {
      return { success: false, error: '生成视频失败' };
    }
  },
};

export default {
  canvas: canvasService,
  image: imageGenerationService,
  video: videoGenerationService,
};