name: Sync to Pages and Functions

on:
  push:
    branches:
      - main
    paths-ignore:
      - "**.md"
      - "LICENSE"
      - ".gitignore"
      - ".editorconfig"
      - ".vscode/**"
      - "docs/**"
      - ".prettierrc*"
      - ".eslintrc*"
      - ".github/ISSUE_TEMPLATE/**"
      - ".github/PULL_REQUEST_TEMPLATE/**"
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: false

jobs:
  convert-and-sync-pages:
    runs-on: ubuntu-latest
    timeout-minutes: 15
    permissions:
      contents: write

    steps:
      - name: Checkout main branch
        uses: actions/checkout@v6
        with:
          ref: main
          fetch-depth: 0

      - name: Configure Git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Create temporary working directory
        run: |
          mkdir -p /tmp/pages-conversion
          cd /tmp/pages-conversion

      - name: Copy source code files only
        run: |
          # Copy only runtime-required files (no documentation, tests, or dev configs)
          cp -r src /tmp/pages-conversion/
          cp package.json /tmp/pages-conversion/
          cp package-lock.json /tmp/pages-conversion/ 2>/dev/null || true
          cp wrangler.toml /tmp/pages-conversion/
          cp LICENSE /tmp/pages-conversion/

      - name: Create Pages Function handler
        run: |
          mkdir -p /tmp/pages-conversion/functions
          cat > /tmp/pages-conversion/functions/[[path]].js << 'EOF'
          /**
           * Xget - High-performance acceleration engine for developer resources
           * Copyright (C) 2025 Xi Xu
           *
           * This program is free software: you can redistribute it and/or modify
           * it under the terms of the GNU General Public License as published by
           * the Free Software Foundation, either version 3 of the License, or
           * (at your option) any later version.
           *
           * This program is distributed in the hope that it will be useful,
           * but WITHOUT ANY WARRANTY; without even the implied warranty of
           * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
           * GNU General Public License for more details.
           *
           * You should have received a copy of the GNU General Public License
           * along with this program. If not, see <https://www.gnu.org/licenses/>.
           */

          import { handleRequest } from '../src/index.js';

          /**
           * Pages Function handler for all routes.
           *
           * This catch-all route handler processes all incoming requests to the Xget
           * acceleration engine. It delegates request processing to the main handleRequest
           * function from the Workers code, maintaining full compatibility with the
           * existing implementation.
           *
           * The [[path]] syntax in the filename creates a catch-all route that matches
           * any path, allowing this single function to handle all requests to the Pages
           * application.
           *
           * @param {Object} context - Pages Function context
           * @param {Request} context.request - The incoming HTTP request
           * @param {Object} context.env - Environment variables and bindings (KV, secrets, etc.)
           * @param {Object} context.params - Route parameters (path segments from [[path]])
           * @param {Function} context.waitUntil - Extend function execution for background tasks
           * @param {Function} context.next - Call next middleware in chain (not used here)
           * @param {Object} context.data - Shared data between functions
           * @returns {Promise<Response>} The HTTP response to return to the client
           *
           * @example
           * // This is called automatically by Pages
           * // Runtime invokes: onRequest(context)
           * // Returns: Response with package data
           *
           * @example
           * // Environment variables usage
           * // wrangler.toml: [vars] TIMEOUT_SECONDS = "60"
           * // context.env contains: { TIMEOUT_SECONDS: "60" }
           * // handleRequest uses createConfig(env) to override defaults
           */
          export async function onRequest(context) {
            // Extract request, env, and create an execution context compatible with Workers
            const { request, env, waitUntil } = context;

            // Create a minimal ExecutionContext-like object for compatibility
            const ctx = {
              waitUntil: waitUntil,
              passThroughOnException: () => {
                // Pages doesn't support passThroughOnException, so this is a no-op
                console.warn('passThroughOnException is not supported in Pages Functions');
              }
            };

            // Delegate to the main request handler
            return handleRequest(request, env, ctx);
          }
          EOF

      - name: Export handleRequest from src/index.js
        run: |
          cd /tmp/pages-conversion
          # Add export statement before the default export at the end of the file
          sed -i '/^export default {$/i\
          export { handleRequest };' src/index.js

      - name: Update wrangler.toml for Pages (remove observability)
        run: |
          cd /tmp/pages-conversion
          # Remove observability section (Pages doesn't support it)
          cat > wrangler.toml << 'EOF'
          #:schema node_modules/wrangler/config-schema.json
          name = "xget"
          pages_build_output_dir = "."
          compatibility_date = "2024-10-22"
          compatibility_flags = ["nodejs_compat"]
          EOF

      - name: Update package.json for Pages
        run: |
          cd /tmp/pages-conversion
          # Update deployment commands to use Pages
          cat package.json | \
          sed 's/"deploy": "wrangler deploy"/"deploy": "wrangler pages deploy ."/' | \
          sed 's/"start": "wrangler dev"/"start": "wrangler pages dev ."/' \
          > package.json.tmp && mv package.json.tmp package.json

      - name: Initialize pages branch
        run: |
          cd /tmp/pages-conversion
          git init
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git checkout -b pages
          git add .
          git commit -m "Convert Workers to Pages

          Auto-converted from main branch commit ${{ github.sha }}

          Runtime files only (documentation, tests, and dev configs excluded)."

      - name: Force push to pages branch
        run: |
          cd /tmp/pages-conversion
          git remote add origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
          git push -f origin pages

      - name: Clean up
        if: always()
        run: |
          rm -rf /tmp/pages-conversion

  convert-and-sync-functions:
    runs-on: ubuntu-latest
    timeout-minutes: 15
    permissions:
      contents: write

    steps:
      - name: Checkout main branch
        uses: actions/checkout@v6
        with:
          ref: main
          fetch-depth: 0

      - name: Configure Git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Create temporary working directory
        run: |
          mkdir -p /tmp/functions-conversion
          cd /tmp/functions-conversion

      - name: Copy source code files only
        run: |
          # Copy only runtime-required files
          cp -r src /tmp/functions-conversion/
          cp package.json /tmp/functions-conversion/
          cp package-lock.json /tmp/functions-conversion/ 2>/dev/null || true
          cp LICENSE /tmp/functions-conversion/

      - name: Create Edge Function handler
        run: |
          mkdir -p /tmp/functions-conversion/api
          cat > /tmp/functions-conversion/api/index.js << 'EOF'
          /**
           * Xget - High-performance acceleration engine for developer resources
           * Copyright (C) 2025 Xi Xu
           *
           * This program is free software: you can redistribute it and/or modify
           * it under the terms of the GNU General Public License as published by
           * the Free Software Foundation, either version 3 of the License, or
           * (at your option) any later version.
           *
           * This program is distributed in the hope that it will be useful,
           * but WITHOUT ANY WARRANTY; without even the implied warranty of
           * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
           * GNU General Public License for more details.
           *
           * You should have received a copy of the GNU General Public License
           * along with this program. If not, see <https://www.gnu.org/licenses/>.
           */

          import { handleRequest } from '../src/index.js';

          /**
           * Edge Function handler.
           *
           * @param {Request} request - Standard Web API Request object
           * @param {Object} [context] - Platform-specific context (Netlify only)
           * @param {Object} [context.geo] - Geolocation data (Netlify)
           * @param {string} [context.ip] - Client IP address (Netlify)
           * @param {Object} [context.env] - Environment variables (Netlify)
           * @param {Function} [context.waitUntil] - Background task extension (Netlify)
           * @returns {Promise<Response>} Standard Web API Response
           *
           * @example
           * // Netlify invokes with context
           * handler(request, { geo: {...}, ip: '1.2.3.4', env: {...}, waitUntil: fn })
           *
           * @example
           * // Vercel invokes without context
           * handler(request)
           */
          export default async function handler(request, context) {
            // Detect runtime environment
            const isNetlify = context && (context.geo !== undefined || context.ip !== undefined);
            const isVercel = !isNetlify && context;

            // Normalize environment variables
            // Netlify provides context.env, Vercel Edge uses globalThis
            let envSource;
            if (isNetlify) {
              envSource = context.env || {};
            } else if (typeof process !== 'undefined' && process.env) {
              // Vercel or Node.js environment
              envSource = process.env;
            } else {
              // Fallback for other environments
              envSource = {};
            }

            const env = {
              TIMEOUT_SECONDS: envSource.TIMEOUT_SECONDS,
              MAX_RETRIES: envSource.MAX_RETRIES,
              RETRY_DELAY_MS: envSource.RETRY_DELAY_MS,
              CACHE_DURATION: envSource.CACHE_DURATION,
              ALLOWED_METHODS: envSource.ALLOWED_METHODS,
              ALLOWED_ORIGINS: envSource.ALLOWED_ORIGINS,
              MAX_PATH_LENGTH: envSource.MAX_PATH_LENGTH,
            };

            // Create normalized execution context
            const ctx = {
              waitUntil: isNetlify && context.waitUntil
                ? (promise) => context.waitUntil(promise)
                : (promise) => {
                    // No-op on Vercel: background tasks not supported
                    // Cache writes will run synchronously instead
                    console.warn('waitUntil is not supported in Vercel Edge Runtime');
                  },
              passThroughOnException: () => {
                // Not supported on either platform in this context
                console.warn('passThroughOnException is not universally supported');
              }
            };

            // Delegate to the main request handler
            return handleRequest(request, env, ctx);
          }

          // Vercel Edge Runtime configuration (ignored by Netlify)
          export const config = {
            runtime: 'edge',
          };
          EOF

      - name: Create vercel.json
        run: |
          cd /tmp/functions-conversion
          cat > vercel.json << 'EOF'
          {
            "$schema": "https://openapi.vercel.sh/vercel.json",
            "name": "xget",
            "version": 2,
            "rewrites": [
              {
                "source": "/(.*)",
                "destination": "/api/index.js"
              }
            ],
            "headers": [
              {
                "source": "/(.*)",
                "headers": [
                  {
                    "key": "X-Powered-By",
                    "value": "Xget/Vercel"
                  }
                ]
              }
            ]
          }
          EOF

      - name: Create netlify.toml
        run: |
          cd /tmp/functions-conversion
          cat > netlify.toml << 'EOF'
          [[edge_functions]]
          function = "edge-handler"
          path = "/*"

          [build]
          publish = "."
          EOF

      - name: Create Netlify Edge Function redirect
        run: |
          cd /tmp/functions-conversion
          mkdir -p netlify/edge-functions
          cat > netlify/edge-functions/edge-handler.js << 'EOF'
          /**
           * Netlify Edge Function entry point.
           *
           * This file serves as a redirect to the edge function handler
           * located at /api/index.js. Both Netlify and Vercel can use the same
           * handler code, with platform detection handling the differences.
           *
           * Netlify requires edge functions to be in netlify/edge-functions/,
           * while Vercel uses /api/ directory. This approach maintains a single
           * source of truth at /api/index.js.
           */
          export { default, config } from '../../api/index.js';
          EOF

      - name: Create Deno Deploy handler
        run: |
          cd /tmp/functions-conversion
          cat > deno.js << 'EOF'
          /**
           * Xget - High-performance acceleration engine for developer resources
           * Copyright (C) 2025 Xi Xu
           *
           * This program is free software: you can redistribute it and/or modify
           * it under the terms of the GNU General Public License as published by
           * the Free Software Foundation, either version 3 of the License, or
           * (at your option) any later version.
           *
           * This program is distributed in the hope that it will be useful,
           * but WITHOUT ANY WARRANTY; without even the implied warranty of
           * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
           * GNU General Public License for more details.
           *
           * You should have received a copy of the GNU General Public License
           * along with this program. If not, see <https://www.gnu.org/licenses/>.
           */

          import { handleRequest } from './src/index.js';

          /**
           * Deno Deploy handler.
           *
           * This is the entry point for Deno Deploy deployments. It uses the
           * standard Deno.serve() API to handle incoming HTTP requests.
           *
           * @param {Request} request - Standard Web API Request object
           * @returns {Promise<Response>} Standard Web API Response
           *
           * @example
           * // Deno Deploy invokes automatically:
           * // Deno.serve((request) => handler(request))
           */
          async function handler(request) {
            // Extract environment variables from Deno.env
            const env = {
              TIMEOUT_SECONDS: Deno.env.get('TIMEOUT_SECONDS'),
              MAX_RETRIES: Deno.env.get('MAX_RETRIES'),
              RETRY_DELAY_MS: Deno.env.get('RETRY_DELAY_MS'),
              CACHE_DURATION: Deno.env.get('CACHE_DURATION'),
              ALLOWED_METHODS: Deno.env.get('ALLOWED_METHODS'),
              ALLOWED_ORIGINS: Deno.env.get('ALLOWED_ORIGINS'),
              MAX_PATH_LENGTH: Deno.env.get('MAX_PATH_LENGTH'),
            };

            // Create minimal ExecutionContext-like object
            // Deno Deploy doesn't support waitUntil, so cache writes are synchronous
            const ctx = {
              waitUntil: (promise) => {
                // No-op on Deno: background tasks not supported
                console.warn('waitUntil is not supported in Deno Deploy');
              },
              passThroughOnException: () => {
                console.warn('passThroughOnException is not supported in Deno Deploy');
              }
            };

            // Delegate to the main request handler
            return handleRequest(request, env, ctx);
          }

          // Start the server
          Deno.serve(handler);
          EOF

      - name: Export handleRequest from src/index.js
        run: |
          cd /tmp/functions-conversion
          # Add export statement before the default export at the end of the file
          sed -i '/^export default {$/i\
          export { handleRequest };' src/index.js

      - name: Update package.json for Vercel
        run: |
          cd /tmp/functions-conversion
          cat > package.json << 'EOF'
          {
            "name": "xget",
            "version": "1.0.0",
            "type": "module",
            "private": false,
            "scripts": {
              "dev": "vercel dev",
              "deploy": "vercel --prod",
              "vercel-build": "echo 'No build step required'"
            },
            "dependencies": {
              "express": "^4.19.2"
            },
            "devDependencies": {
              "@vercel/node": "^3.0.0"
            }
          }
          EOF

      - name: Initialize functions branch
        run: |
          cd /tmp/functions-conversion
          git init
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git checkout -b functions
          git add .
          git commit -m "Convert Workers to Functions

          Auto-converted from main branch commit ${{ github.sha }}

          Runtime files only (documentation, tests, and dev configs excluded)."

      - name: Force push to functions branch
        run: |
          cd /tmp/functions-conversion
          git remote add origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
          git push -f origin functions

      - name: Clean up
        if: always()
        run: |
          rm -rf /tmp/functions-conversion