const { resolve } = require('path')
const { readFileSync, existsSync, readdirSync } = require('fs')
const fs = require('fs')
const parser = require('@babel/parser')
const traverse = require('@babel/traverse').default
const { parse } = require('@vue/compiler-sfc')

// 第一阶段路由映射插件 - 收集直接映射关系
function routeMappingPlugin() {
  return {
    name: 'route-mapping-phase1',
    
    // Webpack插件接口
    apply(compiler) {
      const self = this
      
      // 在编译开始前就生成映射文件
      compiler.hooks.beforeCompile.tapAsync('RouteMappingPlugin', (params, callback) => {
        console.log('🔧 第一阶段：开始收集直接路由-API映射关系...')
        try {
          self.collectDirectMappings()
          callback()
        } catch (error) {
          console.error('❌ 路由映射插件执行失败:', error)
          callback(error)
        }
      })
      
      // 备用钩子，确保在beforeRun时也执行
      compiler.hooks.beforeRun.tapAsync('RouteMappingPlugin', (compilation, callback) => {
        console.log('🔧 第一阶段：开始收集直接路由-API映射关系...')
        try {
          self.collectDirectMappings()
          callback()
        } catch (error) {
          console.error('❌ 路由映射插件执行失败:', error)
          callback(error)
        }
      })
    },
    
    // Vite插件接口
    buildStart() {
      console.log('🔧 第一阶段：开始收集直接路由-API映射关系...')
      this.collectDirectMappings()
    },
    
    // 在开发模式下也执行
    configureServer(server) {
      console.log('🔧 开发模式下收集直接映射关系...')
      this.collectDirectMappings()
    },
    
    // 收集直接映射关系
    collectDirectMappings() {
      try {
        // 1. 分析路由配置
        const routes = this.analyzeRoutes()
        
        // 2. 分析页面组件（第一层）
        const pageMappings = this.analyzePageComponents(routes)
        
        // 3. 分析弹窗组件（第二层）
        const modalMappings = this.analyzeModalComponents()
        
        // 4. 生成映射文件
        this.generateMappingFile(pageMappings, modalMappings)
        
        console.log('✅ 第一阶段直接映射关系收集完成')
      } catch (error) {
        console.error('❌ 直接映射关系收集失败:', error)
        throw error
      }
    },

    // 分析路由配置
    analyzeRoutes() {
      const routerPath = resolve(__dirname, '../src/renderer/router/index.js')
      if (!existsSync(routerPath)) {
        throw new Error('Router file not found')
      }
      
      const routerContent = readFileSync(routerPath, 'utf-8')
      const ast = parser.parse(routerContent, {
        sourceType: 'module',
        plugins: ['jsx']
      })
      
      const routes = []
      
      const self = this
      traverse(ast, {
        ObjectExpression(path) {
          const properties = path.node.properties
          let route = {}
          
          properties.forEach(prop => {
            if (prop.key && prop.key.name === 'path' && prop.value && prop.value.value) {
              route.path = prop.value.value
            }
            if (prop.key && prop.key.name === 'name' && prop.value && prop.value.value) {
              route.name = prop.value.value
            }
            if (prop.key && prop.key.name === 'component' && prop.value) {
              route.component = self.extractComponentName(prop.value)
            }
          })
          
          if (route.path) {
            route.module = self.extractModuleFromPath(route.path)
            routes.push(route)
          }
        }
      })
      
      return routes
    },

    // 分析页面组件（第一层）
    analyzePageComponents(routes) {
      const pageMappings = []
      
      routes.forEach(route => {
        if (route.component) {
          const componentAnalysis = this.analyzeComponent(route.component, route.path)
          if (componentAnalysis && componentAnalysis.apiCalls.length > 0) {
            pageMappings.push({
              route: route.path,
              routeName: route.name,
              component: route.component,
              module: route.module,
              layer: 'page',
              apiCalls: componentAnalysis.apiCalls,
              methods: componentAnalysis.methods
            })
          }
        }
      })
      
      return pageMappings
    },

    // 分析弹窗组件（第二层）
    analyzeModalComponents() {
      const modalMappings = []
      const modalFiles = this.findModalFiles()
      
      modalFiles.forEach(modalFile => {
        const analysis = this.analyzeComponent(modalFile.name, modalFile.path)
        if (analysis && analysis.apiCalls.length > 0) {
          modalMappings.push({
            component: modalFile.name,
            path: modalFile.path,
            module: modalFile.module,
            layer: 'modal',
            apiCalls: analysis.apiCalls,
            methods: analysis.methods
          })
        }
      })
      
      return modalMappings
    },

    // 分析单个组件
    analyzeComponent(componentName, componentPath) {
      try {
        let filePath = componentPath
        
        // 如果是组件名，需要找到对应的文件
        if (!filePath || !existsSync(filePath)) {
          filePath = this.findComponentFile(componentName)
        }
        
        if (!filePath || !existsSync(filePath)) {
          console.warn(`⚠️ 组件文件未找到: ${componentName}`)
          return null
        }
        
        const content = readFileSync(filePath, 'utf-8')
        
        if (filePath.endsWith('.vue')) {
          return this.analyzeVueComponent(content, componentName)
        } else {
          return this.analyzeJavaScriptComponent(content, componentName)
        }
      } catch (error) {
        console.warn(`⚠️ 分析组件失败: ${componentName}`, error.message)
        return null
      }
    },

    // 分析Vue组件
    analyzeVueComponent(content, componentName) {
      const { descriptor } = parse(content)
      const scriptContent = descriptor.script?.content || ''
      
      if (!scriptContent) {
        return { apiCalls: [], methods: [] }
      }
      
      const ast = parser.parse(scriptContent, {
        sourceType: 'module',
        plugins: ['jsx']
      })
      
      return this.extractApiCallsFromAST(ast, componentName)
    },

    // 分析JavaScript组件
    analyzeJavaScriptComponent(content, componentName) {
      const ast = parser.parse(content, {
        sourceType: 'module',
        plugins: ['jsx']
      })
      
      return this.extractApiCallsFromAST(ast, componentName)
    },

    // 从AST中提取API调用
    extractApiCallsFromAST(ast, componentName) {
      const apiCalls = []
      const methods = []
      
      const self = this
      traverse(ast, {
        // 查找方法定义
        FunctionDeclaration(path) {
          if (path.node.id) {
            methods.push(path.node.id.name)
          }
        },
        
        // 查找箭头函数
        ArrowFunctionExpression(path) {
          if (path.parent && path.parent.type === 'VariableDeclarator' && path.parent.id) {
            methods.push(path.parent.id.name)
          }
        },
        
        // 查找API调用
        CallExpression(path) {
          const callInfo = self.extractApiCall(path)
          if (callInfo) {
            apiCalls.push(callInfo)
          }
        }
      })
      
      return { apiCalls, methods }
    },

    // 提取API调用信息
    extractApiCall(path) {
      const node = path.node
      const self = this
      
      // 检查是否是服务调用 (service.method())
      if (node.callee && node.callee.type === 'MemberExpression') {
        const object = node.callee.object
        const property = node.callee.property
        
        if (object && property && object.name && property.name) {
          // 检查是否是服务调用
          if (object.name.endsWith('Service') || object.name === 'api' || object.name === 'axios') {
            return {
              type: 'service',
              service: object.name,
              method: property.name,
              arguments: node.arguments.map(arg => self.extractArgumentValue(arg)),
              line: node.loc?.start?.line || 0
            }
          }
        }
      }
      
      // 检查是否是直接的API调用 (api.get, api.post等)
      if (node.callee && node.callee.type === 'MemberExpression') {
        const object = node.callee.object
        const property = node.callee.property
        
        if (object && property) {
          if (object.name === 'api' || object.name === 'axios' || object.name === 'http') {
            const method = property.name
            const args = node.arguments
            
            if (args.length > 0 && args[0].type === 'StringLiteral') {
              return {
                type: 'api',
                method: method.toUpperCase(),
                path: args[0].value,
                arguments: args.slice(1).map(arg => self.extractArgumentValue(arg)),
                line: node.loc?.start?.line || 0
              }
            }
          }
        }
      }
      
      return null
    },

    // 从模块配置中读取模块名称
    readModuleNamesFromConfig() {
      try {
        const configPath = resolve(__dirname, '../src/renderer/modules/config.js')
        if (!existsSync(configPath)) {
          return []
        }

        const code = readFileSync(configPath, 'utf-8')
        const ast = parser.parse(code, { sourceType: 'module' })
        const modules = []

        traverse(ast, {
          ExportNamedDeclaration(path) {
            const decl = path.node.declaration
            if (decl && decl.type === 'VariableDeclaration') {
              decl.declarations.forEach(d => {
                if (
                  d.id && d.id.name === 'MODULE_CONFIG' &&
                  d.init && d.init.type === 'ObjectExpression'
                ) {
                  d.init.properties.forEach(prop => {
                    if (prop.type === 'ObjectProperty') {
                      if (prop.key.type === 'Identifier') {
                        modules.push(prop.key.name)
                      } else if (prop.key.type === 'StringLiteral') {
                        modules.push(prop.key.value)
                      }
                    }
                  })
                }
              })
            }
          }
        })

        return modules
      } catch (e) {
        console.warn('⚠️ 读取 MODULE_CONFIG 失败，使用默认模块集合: ', e.message)
        return []
      }
    },
    
    // 查找弹窗文件
    findModalFiles() {
      const modalFiles = []
      const moduleDirs = this.readModuleNamesFromConfig()
      
      moduleDirs.forEach(moduleName => {
        const componentsPath = resolve(__dirname, `../src/renderer/modules/${moduleName}/components`)
        
        if (existsSync(componentsPath)) {
          const files = readdirSync(componentsPath).filter(f => 
            f.endsWith('.vue') && (f.toLowerCase().includes('modal') || f.toLowerCase().includes('dialog'))
          )
          files.forEach(file => {
            modalFiles.push({
              name: file.replace('.vue', ''),
              path: resolve(componentsPath, file),
              module: moduleName
            })
          })
        }
      })
      
      return modalFiles
    },

    // 查找组件文件
    findComponentFile(componentName) {
      const moduleDirs = this.readModuleNamesFromConfig()
      
      for (const moduleName of moduleDirs) {
        // 查找views目录
        const viewsPath = resolve(__dirname, `../src/renderer/modules/${moduleName}/views`)
        if (existsSync(viewsPath)) {
          const files = readdirSync(viewsPath).filter(f => f.endsWith('.vue'))
          const matchingFile = files.find(f => f.replace('.vue', '') === componentName)
          if (matchingFile) {
            return resolve(viewsPath, matchingFile)
          }
        }
        
        // 查找components目录
        const componentsPath = resolve(__dirname, `../src/renderer/modules/${moduleName}/components`)
        if (existsSync(componentsPath)) {
          const files = readdirSync(componentsPath).filter(f => f.endsWith('.vue'))
          const matchingFile = files.find(f => f.replace('.vue', '') === componentName)
          if (matchingFile) {
            return resolve(componentsPath, matchingFile)
          }
        }
      }
      
      return null
    },

    // 生成映射文件
    generateMappingFile(pageMappings, modalMappings) {
      const mappingContent = `// 第一阶段：直接路由-API映射关系
// 此文件由 route-mapping-plugin 在构建时生成
// 收集页面和弹窗组件的直接API调用关系
// 请勿手动修改

export const directRouteMappings = {
  // 第一层：页面组件的数据操作API
  pageMappings: ${JSON.stringify(pageMappings, null, 2)},
  
  // 第二层：弹窗组件的数据操作API
  modalMappings: ${JSON.stringify(modalMappings, null, 2)},
  
  // 分析信息
  analysisInfo: {
    phase: 'phase1',
    description: '第一阶段：收集直接映射关系',
    timestamp: new Date().toISOString(),
    pageCount: ${pageMappings.length},
    modalCount: ${modalMappings.length},
    totalApiCalls: ${pageMappings.reduce((sum, p) => sum + p.apiCalls.length, 0) + modalMappings.reduce((sum, m) => sum + m.apiCalls.length, 0)}
  }
}

// 按模块分组的映射
export const moduleMappings = ${JSON.stringify(this.groupMappingsByModule(pageMappings, modalMappings), null, 2)}

// 按API路径分组的映射
export const apiPathMappings = ${JSON.stringify(this.groupMappingsByApiPath(pageMappings, modalMappings), null, 2)}

export default directRouteMappings
`
      
      const outputPath = resolve(__dirname, '../src/renderer/modules/route-sync/direct-route-mappings.js')
      fs.writeFileSync(outputPath, mappingContent, 'utf-8')
      
      console.log(`✅ 直接映射关系文件已生成: ${outputPath}`)
      console.log(`📊 统计信息:`)
      console.log(`   - 页面组件: ${pageMappings.length} 个`)
      console.log(`   - 弹窗组件: ${modalMappings.length} 个`)
      console.log(`   - 总API调用: ${pageMappings.reduce((sum, p) => sum + p.apiCalls.length, 0) + modalMappings.reduce((sum, m) => sum + m.apiCalls.length, 0)} 个`)
    },

    // 按模块分组映射
    groupMappingsByModule(pageMappings, modalMappings) {
      const grouped = {}
      
      // 分组页面映射
      pageMappings.forEach(mapping => {
        const module = mapping.module || 'unknown'
        if (!grouped[module]) {
          grouped[module] = { pages: [], modals: [] }
        }
        grouped[module].pages.push(mapping)
      })
      
      // 分组弹窗映射
      modalMappings.forEach(mapping => {
        const module = mapping.module || 'unknown'
        if (!grouped[module]) {
          grouped[module] = { pages: [], modals: [] }
        }
        grouped[module].modals.push(mapping)
      })
      
      return grouped
    },

    // 按API路径分组映射
    groupMappingsByApiPath(pageMappings, modalMappings) {
      const grouped = {}
      
      const addToGroup = (mapping, layer) => {
        mapping.apiCalls.forEach(apiCall => {
          let key = ''
          if (apiCall.type === 'api') {
            key = `${apiCall.method} ${apiCall.path}`
          } else if (apiCall.type === 'service') {
            key = `${apiCall.service}.${apiCall.method}`
          }
          
          if (key) {
            if (!grouped[key]) {
              grouped[key] = { pages: [], modals: [] }
            }
            grouped[key][layer].push({
              component: mapping.component,
              module: mapping.module,
              route: mapping.route || mapping.path,
              apiCall: apiCall
            })
          }
        })
      }
      
      pageMappings.forEach(mapping => addToGroup(mapping, 'pages'))
      modalMappings.forEach(mapping => addToGroup(mapping, 'modals'))
      
      return grouped
    },
    
    // 提取组件名称
    extractComponentName(node) {
      if (node.type === 'Identifier') {
        return node.name
      } else if (node.type === 'StringLiteral') {
        return node.value
      }
      return null
    },
    
    // 提取参数值
    extractArgumentValue(node) {
      if (node.type === 'StringLiteral') {
        return node.value
      } else if (node.type === 'NumericLiteral') {
        return node.value
      } else if (node.type === 'Identifier') {
        return node.name
      }
      return null
    },
    
    // 从路径提取模块名
    extractModuleFromPath(path) {
      if (path === '/' || path === '') return 'home'
      
      const segments = path.split('/').filter(Boolean)
      if (segments.length === 0) return 'home'
      
      return segments[0]
    }
  }
}

module.exports = { routeMappingPlugin }