const fs = require('fs').promises;
const path = require('path');
const PROJECTS_DIR = path.join('.');
const database_manager = require('../database/database_manager.js');

async function createFolder(name) {
   const projectDir = path.join(PROJECTS_DIR, `${name}`);
   try {
      await fs.access(projectDir);
   } catch (error) {
      if (error.code === 'ENOENT') {
         await fs.mkdir(projectDir, { recursive: true });
      } else {
         throw error;
      }
   }
   return projectDir;
}

async function deleteFolder(name) {
   const projectDir = path.join(PROJECTS_DIR, `${name}`);
   try {
      await fs.access(projectDir);
      await fs.rm(projectDir, { recursive: true, force: true });
   } catch (error) {
      if (error.code !== 'ENOENT') {
         throw error;
      }
   }
}

async function scanAllImages(dir = 'storage') {
   const projectDir = path.join(PROJECTS_DIR, dir);
   let results = [];

   // check if the directory exists and create it if not
   try {
      await fs.access(projectDir);
   } catch (error) {
      if (error.code === 'ENOENT') {
         await fs.mkdir(projectDir, { recursive: true });
      } else {
         throw error;
      }
   }

   async function scanDirectory(directory) {
      const files = await fs.readdir(directory);
      for (const file of files) {
         const filePath = path.join(directory, file);
         const stat = await fs.stat(filePath);
         if (stat.isDirectory()) {
            await scanDirectory(filePath);
         } else if (file.endsWith('.jpg')) {
            results.push(filePath);
         }
      }
   }

   await scanDirectory(projectDir);
   return results;
}

async function saveFile(filePath, content) {
   let Buffer=Buffer.from(content, 'base64');
   if (Buffer.isBuffer(content)) {
      await fs.writeFile(filePath, content);
   } else {
      throw new Error('Content must be a buffer');
   }
}

async function getFile(name) {
   const filePath = path.join(PROJECTS_DIR, `${name}`);
   return await fs.readFile(filePath);
}

async function deleteFile(name) {
   const filePath = path.join(PROJECTS_DIR, `${name}`);
   try {
       await fs.access(filePath); // Vérifie si le fichier existe
       await fs.rm(filePath); // Supprime le fichier
       return `File ${filePath} deleted successfully.`;
   } catch (error) {
       if (error.code === 'ENOENT') {
           return `File ${filePath} does not exist.`;
       } else {
           throw error; // Relance l'erreur si ce n'est pas une erreur de fichier introuvable
       }
   }
}

async function handleFileOperation(operation, ...args) {
   try {
      return await operation(...args);
   } catch (error) {
      console.error(`[FILE OPERATION ERROR] ${error.message}`);
      throw error;
   }
}

const project = {
   createProjectDirectory: async function (projectId) {
      const projectPath = `${projectId}`;
      await handleFileOperation(createFolder, projectPath);
      await handleFileOperation(createFolder, `${projectPath}/images`);
      await handleFileOperation(createFolder, `${projectPath}/videos`);
      console.log("[FILE] createProjectDirectory : " + projectPath);
   },

   deleteProjectDirectory: async function (projectId) {
      const projectPath = `${projectId}`;
      await handleFileOperation(deleteFolder, projectPath);
      console.log("[FILE] deleteProjectDirectory : " + projectPath);
   }
};

const measurement = {
   get_measurement_image: async function (projectId, orderId) {
      const projectPath = `${projectId}`;
      const imagePath = `${projectPath}/images/${orderId}.jpg`;
      console.log("[FILE] get_measurement_image : " + imagePath);
      return await handleFileOperation(getFile, imagePath);
   },

   upload_measurement_image: async function (image, projectId, orderId) {
      const projectPath = `${projectId}`;
      const imagePath = `${projectPath}/images/${orderId}.jpg`;
      console.log("[FILE] upload_measurement_image : " + imagePath);
      await handleFileOperation(saveFile, imagePath, image.buffer);
      return imagePath;
   },

   get_path_from_id: async function (projectId, orderId) {
      const query = database_manager.measurement.get_measurement_by_project_and_order_id(projectId, orderId);
      return query.path;
   },

   get_path_list: async function (IdList, projectId) {
      let parsedIdList;
      try {
         parsedIdList = JSON.parse(IdList);
      } catch (e) {
         console.error("Error parsing IdList:", e);
         return [];
      }

      const pathList = [];
      for (const orderId of parsedIdList) {
         const path = await this.get_path_from_id(projectId, orderId);
         pathList.push(path);
      }

      console.log("[FILE] get_path_list : " + pathList);

      return pathList;
   },
}

const video = {
   get_video: async function (projectId, orderId) {
      const projectPath = `${projectId}`;
      const videoPath = `${projectPath}/videos/${orderId}.mp4`;
      console.log("[FILE] get_video : " + videoPath);
      return await handleFileOperation(getFile, videoPath);
   },

   delete_video: async function (videoId) {
      const query = database_manager.video.get_video_by_id(videoId);
      const videoPath = query.video_file;
      console.log("[FILE] delete_video : " + videoPath);
      return await handleFileOperation(deleteFile, videoPath);
   },

   delete_unfinished_videos: async function () {
      const unfinishedVideos = await database_manager.video.get_unfinished_videos();

      for (const video of unfinishedVideos) {
          try {
              await this.delete_video(video.id);
              console.log(`Deleted unfinished video with id: ${video.id}`);
          } catch (error) {
              console.error(`Error deleting unfinished video with id: ${video.id}`, error);
          }
      }
   }
}

module.exports = {
   createFolder,
   deleteFolder,
   scanAllImages,
   saveFile,
   getFile,
   deleteFile,
   project,
   measurement,
   video
};