import { ipcMain, shell, IpcMainEvent, dialog } from 'electron'
import Constants from './utils/Constants'
import { join, dirname } from 'path'
import {
  writeFileSync,
  readFileSync,
  existsSync,
  ensureDirSync,
  copyFileSync
} from 'fs-extra'

/*
 * IPC Communications
 * */
export default class IPCs {
  static initialize(): void {
    // Get application version
    ipcMain.handle('msgRequestGetVersion', () => {
      return Constants.APP_VERSION
    })

    // Open url via web browser
    ipcMain.on(
      'msgOpenExternalLink',
      async (event: IpcMainEvent, url: string) => {
        await shell.openExternal(url)
      }
    )

    // Open file
    ipcMain.handle(
      'msgOpenFile',
      async (event: IpcMainEvent, filter: string) => {
        const filters = []
        if (filter === 'text') {
          filters.push({ name: 'Text', extensions: ['txt', 'json'] })
        } else if (filter === 'zip') {
          filters.push({ name: 'Zip', extensions: ['zip'] })
        } else if (filter === 'any') {
          filters.push({ name: 'All Files', extensions: ['*'] })
        }
        const dialogResult = await dialog.showOpenDialog({
          properties: ['openFile'],
          filters
        })
        return dialogResult
      }
    )

    // Select directory
    ipcMain.handle('msgSelectDirectory', async () => {
      const dialogResult = await dialog.showOpenDialog({
        properties: ['openDirectory']
      })

      if (!dialogResult.canceled && dialogResult.filePaths.length > 0) {
        return {
          canceled: false,
          filePath: dialogResult.filePaths[0]
        }
      }

      return { canceled: true }
    })

    // Find all files in a folder recursively
    ipcMain.handle(
      'msgFindFilesInFolder',
      async (event: IpcMainEvent, folderPath: string) => {
        try {
          const { readdirSync, statSync } = require('fs')
          const { join } = require('path')
          
          const foundFiles: string[] = []
          
          const searchFiles = (dir: string) => {
            const items = readdirSync(dir)
            
            for (const item of items) {
              const fullPath = join(dir, item)
              const stats = statSync(fullPath)
              
              if (stats.isDirectory()) {
                // Recursively search in subdirectories
                searchFiles(fullPath)
              } else if (stats.isFile()) {
                // Add file to the list
                foundFiles.push(fullPath)
              }
            }
          }
          
          searchFiles(folderPath)
          
          return foundFiles
        } catch (error) {
          console.error('Error finding files in folder:', error)
          return []
        }
      }
    )

    // Load data from local file
    ipcMain.handle(
      'msgLoadData',
      async (event: IpcMainEvent, fileName: string) => {
        try {
          const userDataPath = join(Constants.APP_DATA_PATH, 'data')
          const filePath = join(userDataPath, fileName)

          // Ensure directory exists
          ensureDirSync(userDataPath)

          if (existsSync(filePath)) {
            const data = readFileSync(filePath, 'utf-8')
            return data
          }
          return null
        } catch (error) {
          console.error('Error loading data:', error)
          return null
        }
      }
    )

    // Save data to local file
    ipcMain.handle(
      'msgSaveData',
      async (event: IpcMainEvent, fileName: string, data: string) => {
        try {
          const userDataPath = join(Constants.APP_DATA_PATH, 'data')
          const filePath = join(userDataPath, fileName)

          // Ensure directory exists
          ensureDirSync(userDataPath)

          writeFileSync(filePath, data, 'utf-8')
          return true
        } catch (error) {
          console.error('Error saving data:', error)
          return false
        }
      }
    )

    // Execute template
    ipcMain.handle(
      'msgExecuteTemplate',
      async (
        event: IpcMainEvent,
        templateId: string,
        targetPath: string,
        baseDirNames: string[]
      ) => {
        try {
          // Load templates data
          const userDataPath = join(Constants.APP_DATA_PATH, 'data')
          const filePath = join(userDataPath, 'templates.json')

          let templates = []
          if (existsSync(filePath)) {
            const templatesData = readFileSync(filePath, 'utf-8')
            templates = JSON.parse(templatesData)
          }

          const template = templates.find((t) => t.id === templateId)

          if (!template) {
            return { success: false, error: 'Template not found' }
          }

          // Create directories and files for each base directory name
          for (const baseDirName of baseDirNames) {
            if (!baseDirName.trim()) continue

            // Create base directory
            const baseDirPath = join(targetPath, baseDirName)
            ensureDirSync(baseDirPath)

            // Helper function to traverse the tree and collect all nodes
            const collectAllNodes = (nodes, allNodes = []) => {
              for (const node of nodes) {
                allNodes.push(node);
                if (node.children) {
                  collectAllNodes(node.children, allNodes);
                }
              }
              return allNodes;
            };
            
            // Collect all nodes from the tree structure
            if (template.treeStructure && template.treeStructure.length > 0) {
              const allNodes = collectAllNodes(template.treeStructure);
              
              // Process all nodes, making sure directories are created before files
              for (const node of allNodes) {
                const nodePath = join(baseDirPath, node.path);
                
                if (node.type === 'directory') {
                  ensureDirSync(nodePath);
                } else if (node.type === 'file') {
                  const fileDir = dirname(nodePath);
                  ensureDirSync(fileDir);
                  
                  if (node.sourceFilePath) {
                    // Copy from source file
                    const sourceContent = readFileSync(node.sourceFilePath);
                    writeFileSync(nodePath, sourceContent);
                  } else if (node.content) {
                    // Write content directly
                    writeFileSync(nodePath, node.content, 'utf-8');
                  }
                }
              }
            }
          }

          return { success: true }
        } catch (error) {
          console.error('Error executing template:', error)
          return { success: false, error: error.message }
        }
      }
    )
  }
}