// nitro hook to get Directus files working on ssg
// https://github.com/codepie-io/nuxt3-dynamic-routes/blob/main/nuxt.config.ts
// + ssg homemade caching to not retrieve all the files each generation

import { createDirectus, staticToken, rest, readFiles } from '@directus/sdk';
import fs from 'fs';
import path from 'path';
import { promisify } from 'util';

export default defineNuxtConfig({
  devtools: { enabled: true },
  modules: [
    '@nuxtjs/seo'
  ],
  runtimeConfig: {
    apiURL: process.env.DIRECTUS_URL,
    apiToken: process.env.DIRECTUS_API_TOKEN
  },
  nitro: {
    hooks: {
      async 'prerender:routes'(routes) {
        
        const client = createDirectus(process.env.DIRECTUS_URL)
          .with(staticToken(process.env.DIRECTUS_API_TOKEN))
          .with(rest());

        const directusFiles = await client.request(
          readFiles({
            query: {
              filter: {
                type: {
                  _eq: 'image',
                },
              },
            },
          })
        );

        for (let image of directusFiles) {
          const fileExists = async (filePath) => !!(await fs.promises.access(filePath, fs.constants.F_OK).then(() => true).catch(() => false));

          const filePath = `./public/api/assets/${image.id}.webp`;
          fileExists(filePath)
              .then(exists => {
                  if (!exists) {
                    routes.add(`/api/assets/${image.id}.webp`);
                  }
              })
              .catch(error => console.error('Error:', error));
        }
      },
    },
    prerender: {
      routes: [
        '/api/items/global'
      ]
    },
  },
  hooks: {
    'nitro:build:public-assets': () => {
      if (!fs.existsSync('./public/api/assets')) fs.mkdirSync('./public/api/assets', { recursive: true });

      const readdir = promisify(fs.readdir);
      const stat = promisify(fs.stat);
      const copyFile = promisify(fs.copyFile);

      async function directoryExists(directoryPath) {
        try {
            const stats = await fs.promises.stat(directoryPath);
            return stats.isDirectory();
        } catch (error) {
            if (error.code === 'ENOENT') {
                return false;
            } else {
                throw error;
            }
        }
      }

      async function copyFilesIfNotExist(sourceFolder, destinationFolder) {
        try {
          const exists = await directoryExists(sourceFolder);
          if (!exists) {
              console.log(`Source folder '${sourceFolder}' does not exist.`);
              return;
          }
          
          const files = await readdir(sourceFolder);
          for (const file of files) {
              const sourceFilePath = path.join(sourceFolder, file);
              const destinationFilePath = path.join(destinationFolder, file);
              const sourceFileStat = await stat(sourceFilePath);
  
              if (sourceFileStat.isFile()) {
                  try {
                      await stat(destinationFilePath);
                  } catch (error) {
                      if (error.code === 'ENOENT') {
                          await copyFile(sourceFilePath, destinationFilePath);
                          console.log(`Copied '${file}' to '${destinationFolder}'.`);
                      } else {
                          throw error;
                      }
                  }
              }
          }
          console.log('Files copied successfully.');
        } catch (error) {
            console.error('Error:', error);
        }
      }

      const sourceFolder = './.output/public/api/assets';      
      const destinationFolder = './public/api/assets';
      copyFilesIfNotExist(sourceFolder, destinationFolder);
    }
  },
  app: {
    pageTransition: { name: 'page', mode: 'out-in' }
  },
  site: {
    url: process.env.URL,
    defaultLocale: 'fr',
    name: 'Mahée Auffret',
    description: 'Portfolio de l\'artiste-peintre basée à Rennes Mahée Auffret'
  }
})