import { create } from 'zustand';
import { invoke } from '@tauri-apps/api/core';
import { 
  Material, 
  MaterialStats, 
  CreateMaterialRequest, 
  MaterialImportResult,
  ProcessingStatus,
  MaterialProcessingConfig
} from '../types/material';

/**
 * 素材状态管理
 * 遵循 Tauri 开发规范的状态管理模式
 */
interface MaterialState {
  // 状态
  materials: Material[];
  currentMaterial: Material | null;
  stats: MaterialStats | null;
  isLoading: boolean;
  isImporting: boolean;
  isProcessing: boolean;
  error: string | null;
  importProgress: {
    current_file: string;
    processed_count: number;
    total_count: number;
    current_status: string;
    errors: string[];
  } | null;

  // 操作
  loadMaterials: (projectId: string) => Promise<void>;
  loadMaterialStats: (projectId: string) => Promise<void>;
  importMaterials: (request: CreateMaterialRequest) => Promise<MaterialImportResult>;
  getMaterialById: (id: string) => Promise<Material | null>;
  deleteMaterial: (id: string) => Promise<void>;
  processMaterials: (materialIds: string[]) => Promise<void>;
  updateMaterialStatus: (id: string, status: ProcessingStatus, errorMessage?: string) => Promise<void>;
  cleanupInvalidMaterials: (projectId: string) => Promise<string>;
  setCurrentMaterial: (material: Material | null) => void;
  clearError: () => void;
  
  // 工具方法
  selectMaterialFiles: () => Promise<string[]>;
  validateMaterialFiles: (filePaths: string[]) => Promise<string[]>;
  getFileInfo: (filePath: string) => Promise<any>;
  checkFFmpegAvailable: () => Promise<boolean>;
  getFFmpegVersion: () => Promise<string>;
  getSupportedExtensions: () => Promise<string[]>;
}

export const useMaterialStore = create<MaterialState>((set, get) => ({
  // 初始状态
  materials: [],
  currentMaterial: null,
  stats: null,
  isLoading: false,
  isImporting: false,
  isProcessing: false,
  error: null,
  importProgress: null,

  // 加载项目素材
  loadMaterials: async (projectId: string) => {
    set({ isLoading: true, error: null });
    try {
      const materials = await invoke<Material[]>('get_project_materials', { projectId });
      set({ materials, isLoading: false });
    } catch (error) {
      set({ 
        error: error as string, 
        isLoading: false,
        materials: []
      });
    }
  },

  // 加载素材统计
  loadMaterialStats: async (projectId: string) => {
    try {
      const stats = await invoke<MaterialStats>('get_project_material_stats', { projectId });
      set({ stats });
    } catch (error) {
      console.error('加载素材统计失败:', error);
    }
  },

  // 导入素材
  importMaterials: async (request: CreateMaterialRequest) => {
    set({ isImporting: true, error: null, importProgress: {
      current_file: '',
      processed_count: 0,
      total_count: request.file_paths.length,
      current_status: '准备导入...',
      errors: []
    }});

    try {
      const result = await invoke<MaterialImportResult>('import_materials', { request });
      
      // 更新素材列表
      const { materials } = get();
      set({ 
        materials: [...materials, ...result.created_materials],
        isImporting: false,
        importProgress: null
      });

      // 重新加载统计信息
      get().loadMaterialStats(request.project_id);

      return result;
    } catch (error) {
      set({ 
        error: error as string, 
        isImporting: false,
        importProgress: null
      });
      throw error;
    }
  },

  // 获取素材详情
  getMaterialById: async (id: string) => {
    try {
      const material = await invoke<Material | null>('get_material_by_id', { id });
      return material;
    } catch (error) {
      set({ error: error as string });
      return null;
    }
  },

  // 删除素材
  deleteMaterial: async (id: string) => {
    try {
      await invoke('delete_material', { id });
      
      // 从状态中移除
      const { materials } = get();
      set({ materials: materials.filter(m => m.id !== id) });
      
      // 如果删除的是当前素材，清空当前素材
      const { currentMaterial } = get();
      if (currentMaterial?.id === id) {
        set({ currentMaterial: null });
      }
    } catch (error) {
      set({ error: error as string });
      throw error;
    }
  },

  // 批量处理素材
  processMaterials: async (materialIds: string[]) => {
    set({ isProcessing: true, error: null });
    try {
      const processedIds = await invoke<string[]>('batch_process_materials', { materialIds });
      
      // 更新处理状态
      const { materials } = get();
      const updatedMaterials = materials.map(material => {
        if (processedIds.includes(material.id)) {
          return { ...material, processing_status: 'Processing' as ProcessingStatus };
        }
        return material;
      });
      
      set({ materials: updatedMaterials, isProcessing: false });
    } catch (error) {
      set({ error: error as string, isProcessing: false });
      throw error;
    }
  },

  // 更新素材状态
  updateMaterialStatus: async (id: string, status: ProcessingStatus, errorMessage?: string) => {
    try {
      await invoke('update_material_status', { id, status, errorMessage });
      
      // 更新本地状态
      const { materials } = get();
      const updatedMaterials = materials.map(material => {
        if (material.id === id) {
          return { 
            ...material, 
            processing_status: status,
            error_message: errorMessage,
            updated_at: new Date().toISOString()
          };
        }
        return material;
      });
      
      set({ materials: updatedMaterials });
    } catch (error) {
      set({ error: error as string });
      throw error;
    }
  },

  // 清理失效素材
  cleanupInvalidMaterials: async (projectId: string) => {
    try {
      const result = await invoke<string>('cleanup_invalid_materials', { projectId });
      
      // 重新加载素材列表
      await get().loadMaterials(projectId);
      
      return result;
    } catch (error) {
      set({ error: error as string });
      throw error;
    }
  },

  // 设置当前素材
  setCurrentMaterial: (material: Material | null) => {
    set({ currentMaterial: material });
  },

  // 清除错误
  clearError: () => {
    set({ error: null });
  },

  // 选择素材文件
  selectMaterialFiles: async () => {
    try {
      const filePaths = await invoke<string[]>('select_material_files');
      return filePaths;
    } catch (error) {
      set({ error: error as string });
      return [];
    }
  },

  // 验证素材文件
  validateMaterialFiles: async (filePaths: string[]) => {
    try {
      const validFiles = await invoke<string[]>('validate_material_files', { filePaths });
      return validFiles;
    } catch (error) {
      set({ error: error as string });
      return [];
    }
  },

  // 获取文件信息
  getFileInfo: async (filePath: string) => {
    try {
      const fileInfo = await invoke('get_file_info', { filePath });
      return fileInfo;
    } catch (error) {
      set({ error: error as string });
      return null;
    }
  },

  // 检查 FFmpeg 是否可用
  checkFFmpegAvailable: async () => {
    try {
      const isAvailable = await invoke<boolean>('check_ffmpeg_available');
      return isAvailable;
    } catch (error) {
      console.error('检查 FFmpeg 失败:', error);
      return false;
    }
  },

  // 获取 FFmpeg 版本
  getFFmpegVersion: async () => {
    try {
      const version = await invoke<string>('get_ffmpeg_version');
      return version;
    } catch (error) {
      console.error('获取 FFmpeg 版本失败:', error);
      return 'Unknown';
    }
  },

  // 获取支持的扩展名
  getSupportedExtensions: async () => {
    try {
      const extensions = await invoke<string[]>('get_supported_extensions');
      return extensions;
    } catch (error) {
      console.error('获取支持的扩展名失败:', error);
      return [];
    }
  },

  // 测试场景检测
  testSceneDetection: async (filePath: string) => {
    try {
      const result = await invoke<string>('test_scene_detection', { filePath });
      return result;
    } catch (error) {
      console.error('测试场景检测失败:', error);
      return `测试失败: ${error}`;
    }
  },

  // 获取FFmpeg状态
  getFFmpegStatus: async () => {
    try {
      const status = await invoke<string>('get_ffmpeg_status');
      return status;
    } catch (error) {
      console.error('获取FFmpeg状态失败:', error);
      return `获取状态失败: ${error}`;
    }
  },
}));