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

/**
 * 基于AST的组件关系分析器
 * 使用vue-template-compiler解析模板，babel解析JS部分
 */
class ComponentRelationshipAnalyzerAST {
  constructor() {
    this.componentRelationships = []
    this.processedComponents = new Set()
  }

  /**
   * 分析组件关系
   * @param {Array} routes - 路由数组
   * @param {Array} apiMappings - API映射数组
   * @returns {Array} 组件关系列表
   */
  analyzeComponentRelationships(routes, apiMappings) {
    this.componentRelationships = []
    this.processedComponents.clear()

    // 获取所有顶级组件（routes中的组件）并分配ID
    const topLevelComponents = routes.map((route, index) => ({
      id: index + 1, // 为routes分配ID
      component: route.component,
      module: this.getModuleFromRoute(route),
      path: route.path
    }))

    // 获取所有触发源组件并分配ID
    let triggerSourceId = 1
    const triggerSourceComponents = this.extractTriggerSourceComponents(apiMappings).map(component => ({
      id: triggerSourceId++, // 为triggerSource分配ID
      ...component
    }))

    console.log(`🔍 开始分析组件关系，触发源组件数量: ${triggerSourceComponents.length}`)

    // 为每个触发源组件分析其与顶级组件的关系
    triggerSourceComponents.forEach(triggerComponent => {
      this.analyzeComponentToTopLevel(triggerComponent, topLevelComponents)
    })

    console.log(`🔍 分析完成，找到 ${this.componentRelationships.length} 个组件关系`)
    return this.componentRelationships
  }

  /**
   * 从路由中获取模块信息
   * @param {Object} route - 路由对象
   * @returns {string} 模块名称
   */
  getModuleFromRoute(route) {
    // 直接使用路由中的module字段，不再进行推断
    return route.module || 'unknown'
  }

  /**
   * 提取所有触发源组件
   * @param {Array} apiMappings - API映射数组
   * @returns {Array} 触发源组件数组
   */
  extractTriggerSourceComponents(apiMappings) {
    const components = []
    
    apiMappings.forEach(apiMapping => {
      if (apiMapping.triggerSources) {
        apiMapping.triggerSources.forEach(triggerSource => {
          components.push({
            component: triggerSource.component,
            module: triggerSource.module,
            triggerName: triggerSource.triggerName,
            triggerType: triggerSource.triggerType,
            apiMethodName: apiMapping.apiMethodName,
            apiModule: apiMapping.module
          })
        })
      }
    })

    return components
  }

  /**
   * 分析组件到顶级组件的关系
   * @param {Object} triggerComponent - 触发源组件
   * @param {Array} topLevelComponents - 顶级组件数组
   */
  analyzeComponentToTopLevel(triggerComponent, topLevelComponents) {
    const triggerKey = `${triggerComponent.id}:${triggerComponent.module}:${triggerComponent.component}`
    
    // 避免重复处理同一个触发源
    if (this.processedComponents.has(triggerKey)) {
      console.log(`  ⏭️ 跳过重复处理: ${triggerKey}`)
      return
    }
    
    this.processedComponents.add(triggerKey)

    // 如果触发源组件本身就是顶级组件，直接建立关系
    const isTopLevel = topLevelComponents.find(top => 
      top.component === triggerComponent.component && top.module === triggerComponent.module
    )

    if (isTopLevel) {
      this.componentRelationships.push({
        triggerSourceId: triggerComponent.id, // 使用ID引用
        routeId: isTopLevel.id, // 使用ID引用
        relationshipType: 'self'
      })
      return
    }

    // 查找父组件关系
    const parentComponents = this.findParentComponentsAST(triggerComponent)
    let hasRelationship = false
    
    
    if (parentComponents.length > 0) {
      parentComponents.forEach(parent => {
        // 递归查找父组件的父组件，直到找到顶级组件
        const found = this.findTopLevelAncestors(parent, triggerComponent, topLevelComponents)
        if (found) hasRelationship = true
      })
    }
    
    // 如果没有找到父组件关系，尝试直接匹配顶级组件
    if (!hasRelationship) {
      const directMatch = topLevelComponents.find(top => 
        top.component === triggerComponent.component || 
        top.module === triggerComponent.module
      )
      
      if (directMatch) {
        this.componentRelationships.push({
          triggerSourceId: triggerComponent.id,
          routeId: directMatch.id,
          relationshipType: 'direct'
        })
        hasRelationship = true
      }
    }
    
    // 最后的兜底：确保每个触发源都至少有一个关系记录
    if (!hasRelationship) {
      this.componentRelationships.push({
        triggerSourceId: triggerComponent.id,
        routeId: 1, // 默认关联到第一个路由
        relationshipType: 'fallback'
      })
    }
  }

  /**
   * 使用AST解析查找组件的父组件
   * @param {Object} component - 组件信息
   * @returns {Array} 父组件数组
   */
  findParentComponentsAST(component) {
    const parents = []
    
    try {
      // 查找所有模块中的组件，看哪些引用了当前组件
      const modulesPath = resolve(__dirname, '../../src/renderer/modules')
      if (existsSync(modulesPath)) {
        const moduleDirs = readdirSync(modulesPath, { withFileTypes: true })
          .filter(dirent => dirent.isDirectory())
          .map(dirent => dirent.name)

        moduleDirs.forEach(moduleName => {
          const parentComponents = this.findComponentsInModuleAST(moduleName, component)
          parents.push(...parentComponents)
        })
      }
    } catch (error) {
      // 静默处理错误
    }

    return parents
  }

  /**
   * 在指定模块中使用AST解析查找引用目标组件的组件
   * @param {string} moduleName - 模块名称
   * @param {Object} targetComponent - 目标组件
   * @returns {Array} 父组件数组
   */
  findComponentsInModuleAST(moduleName, targetComponent) {
    const parents = []
    
    try {
      const modulePath = resolve(__dirname, '../../src/renderer/modules', moduleName)
      if (!existsSync(modulePath)) return parents

      // 查找views目录
      const viewsPath = resolve(modulePath, 'views')
      if (existsSync(viewsPath)) {
        const viewFiles = readdirSync(viewsPath).filter(file => file.endsWith('.vue'))
        viewFiles.forEach(file => {
          const componentName = file.replace('.vue', '')
          if (this.componentReferencesTargetAST(viewsPath, file, targetComponent)) {
            console.log(`🔍 找到父组件: ${moduleName}:${componentName} -> ${targetComponent.module}:${targetComponent.component}`)
            parents.push({
              component: componentName,
              module: moduleName,
              type: 'view'
            })
          }
        })
      }

      // 查找components目录
      const componentsPath = resolve(modulePath, 'components')
      if (existsSync(componentsPath)) {
        const componentFiles = readdirSync(componentsPath).filter(file => file.endsWith('.vue'))
        componentFiles.forEach(file => {
          const componentName = file.replace('.vue', '')
          if (this.componentReferencesTargetAST(componentsPath, file, targetComponent)) {
            console.log(`🔍 找到父组件: ${moduleName}:${componentName} -> ${targetComponent.module}:${targetComponent.component}`)
            parents.push({
              component: componentName,
              module: moduleName,
              type: 'component'
            })
          }
        })
      }
    } catch (error) {
      // 静默处理错误
    }

    return parents
  }

  /**
   * 使用AST解析检查组件是否引用了目标组件
   * @param {string} dirPath - 目录路径
   * @param {string} fileName - 文件名
   * @param {Object} targetComponent - 目标组件
   * @returns {boolean} 是否引用
   */
  componentReferencesTargetAST(dirPath, fileName, targetComponent) {
    try {
      const filePath = resolve(dirPath, fileName)
      const content = readFileSync(filePath, 'utf-8')
      
      // 解析Vue单文件组件
      const { script, template } = this.parseVueSFC(content)
      
      // 检查script部分的import和components注册
      if (script && this.analyzeScriptAST(script, targetComponent)) {
        return true
      }
      
      // 检查template部分的使用
      if (template && this.analyzeTemplateAST(template, targetComponent)) {
        return true
      }

      return false
    } catch (error) {
      return false
    }
  }

  /**
   * 解析Vue单文件组件
   * @param {string} content - 文件内容
   * @returns {Object} 解析结果
   */
  parseVueSFC(content) {
    const result = { script: null, template: null }
    
    try {
      // 提取script部分
      const scriptMatch = content.match(/<script[^>]*>([\s\S]*?)<\/script>/)
      if (scriptMatch) {
        result.script = scriptMatch[1]
      }
      
      // 提取template部分
      const templateMatch = content.match(/<template[^>]*>([\s\S]*?)<\/template>/)
      if (templateMatch) {
        result.template = templateMatch[1]
      }
    } catch (error) {
      // 静默处理错误
    }
    
    return result
  }

  /**
   * 使用Babel AST分析script部分
   * @param {string} scriptContent - script内容
   * @param {Object} targetComponent - 目标组件
   * @returns {boolean} 是否引用
   */
  analyzeScriptAST(scriptContent, targetComponent) {
    try {
      const ast = parser.parse(scriptContent, {
        sourceType: 'module',
        plugins: ['jsx', 'typescript']
      })
      
      let hasReference = false
      
      traverse(ast, {
        // 检查import语句 - 更精确的匹配
        ImportDeclaration(path) {
          const source = path.node.source.value
          // 检查import的默认导入
          if (path.node.specifiers) {
            path.node.specifiers.forEach(spec => {
              if (spec.type === 'ImportDefaultSpecifier' && 
                  spec.local.name === targetComponent.component) {
                hasReference = true
              }
              // 检查命名导入
              if (spec.type === 'ImportSpecifier' && 
                  spec.imported.name === targetComponent.component) {
                hasReference = true
              }
            })
          }
        },
        
        // 检查components注册 - 支持多种格式
        ObjectProperty(path) {
          if (path.node.key.name === 'components') {
            const value = path.node.value
            if (value.type === 'ObjectExpression') {
              value.properties.forEach(prop => {
                // 支持 components: { ComponentName: ComponentName }
                if (prop.key.name === targetComponent.component) {
                  hasReference = true
                }
                // 支持 components: { ComponentName }
                if (prop.type === 'ObjectProperty' && 
                    prop.key.name === targetComponent.component) {
                  hasReference = true
                }
              })
            }
          }
        },
        
        // 检查Vue 3 Composition API的组件注册
        CallExpression(path) {
          if (path.node.callee.name === 'defineComponent') {
            const arg = path.node.arguments[0]
            if (arg && arg.type === 'ObjectExpression') {
              arg.properties.forEach(prop => {
                if (prop.key.name === 'components') {
                  const componentsValue = prop.value
                  if (componentsValue.type === 'ObjectExpression') {
                    componentsValue.properties.forEach(compProp => {
                      if (compProp.key.name === targetComponent.component) {
                        hasReference = true
                      }
                    })
                  }
                }
              })
            }
          }
        }
      })
      
      return hasReference
    } catch (error) {
      return false
    }
  }

  /**
   * 使用Vue template compiler分析template部分
   * @param {string} templateContent - template内容
   * @param {Object} targetComponent - 目标组件
   * @returns {boolean} 是否引用
   */
  analyzeTemplateAST(templateContent, targetComponent) {
    try {
      const ast = parse(templateContent)
      
      let hasReference = false
      
      // 遍历AST查找组件使用
      const traverse = (node) => {
        if (node.type === 1) { // Element
          // 检查标签名是否匹配目标组件
          if (node.tag === targetComponent.component) {
            hasReference = true
            return
          }
          
          // 检查动态组件
          if (node.tag === 'component' && node.props) {
            node.props.forEach(prop => {
              if (prop.name === 'is' && prop.value && 
                  prop.value.content === targetComponent.component) {
                hasReference = true
                return
              }
            })
          }
          
          // 递归遍历子节点
          if (node.children) {
            node.children.forEach(child => {
              if (child.type === 1) { // Element
                traverse(child)
              }
            })
          }
        }
      }
      
      traverse(ast)
      return hasReference
    } catch (error) {
      return false
    }
  }

  /**
   * 查找顶级祖先组件
   * @param {Object} parentComponent - 父组件
   * @param {Object} originalTrigger - 原始触发组件
   * @param {Array} topLevelComponents - 顶级组件数组
   * @returns {boolean} 是否找到了关系
   */
  findTopLevelAncestors(parentComponent, originalTrigger, topLevelComponents) {
    // 检查父组件是否是顶级组件
    const isTopLevel = topLevelComponents.find(top => 
      top.component === parentComponent.component && top.module === parentComponent.module
    )

    if (isTopLevel) {
      // 找到顶级组件，建立关系
      this.componentRelationships.push({
        triggerSourceId: originalTrigger.id, // 使用ID引用
        routeId: isTopLevel.id, // 使用ID引用
        relationshipType: 'ancestor'
      })
      return true
    }

    // 继续向上查找
    const grandParents = this.findParentComponentsAST(parentComponent)
    let found = false
    grandParents.forEach(grandParent => {
      const result = this.findTopLevelAncestors(grandParent, originalTrigger, topLevelComponents)
      if (result) found = true
    })
    return found
  }
}

module.exports = ComponentRelationshipAnalyzerAST