name: Frontend - Build and Deploy to Cloudflare Pages

on:
  workflow_call:
    inputs:
      mode:
        description: "Build mode: 'prod' or 'pr'"
        required: true
        type: string
      pr_number:
        description: 'PR number (required when mode=pr)'
        required: false
        type: string
      project_name:
        description: 'Cloudflare Pages project name (overrides default)'
        required: false
        type: string
    secrets:
      CLOUDFLARE_API_TOKEN:
        required: true
      CLOUDFLARE_ACCOUNT_ID:
        required: true
    outputs:
      deployed_url:
        description: 'URL of deployed frontend'
        value: ${{ jobs.deploy.outputs.deployed_url }}

# Required repository secrets:
#   CLOUDFLARE_API_TOKEN     - API token with Pages:Edit (or Account:Workers Scripts:Edit) permissions
#   CLOUDFLARE_ACCOUNT_ID    - Your Cloudflare account ID
# Optional repository variables:
#   CF_PAGES_PROJECT_NAME      - Default Cloudflare Pages project name
#   PROD_DOMAIN                - App domain for prod releases (e.g., api.example.com or https://api.example.com)
#   BACKEND_URL_PR_TEMPLATE    - Template for PR backend URL. Use {PR} placeholder for PR number (e.g., https://api-pr-{PR}.example.com)

jobs:
  build:
    name: Build frontend
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: 7project/frontend
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Use Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'
          cache-dependency-path: 7project/frontend/package-lock.json

      - name: Install dependencies
        run: npm ci

      - name: Compute backend URL for Vite
        id: be
        env:
          EVENT_NAME: ${{ github.event_name }}
          PR_NUMBER: ${{ github.event.pull_request.number || inputs.pr_number }}
          PR_TEMPLATE: ${{ vars.BACKEND_URL_PR_TEMPLATE }}
          PROD_DOMAIN: ${{ vars.PROD_DOMAIN }}
          MODE: ${{ inputs.mode }}
        run: |
          set -euo pipefail
          URL=""
          if [ -n "${PROD_DOMAIN:-}" ]; then
            if echo "$PROD_DOMAIN" | grep -Eiq '^https?://'; then
              URL="$PROD_DOMAIN"
            else
              URL="https://${PROD_DOMAIN}"
            fi
          fi
          if [ "${MODE:-}" = "pr" ] || [ "${EVENT_NAME}" = "pull_request" ]; then
            if [ -n "${PR_TEMPLATE:-}" ] && [ -n "${PR_NUMBER:-}" ] ; then
              URL="${PR_TEMPLATE//\{PR\}/${PR_NUMBER}}"
            fi
          fi
          echo "Using backend URL: ${URL:-<empty>}"
          echo "VITE_BACKEND_URL=${URL}" >> $GITHUB_ENV

      - name: Build
        run: npm run build

      - name: Upload build artifact
        uses: actions/upload-artifact@v4
        with:
          name: frontend-dist
          path: 7project/frontend/dist

  deploy:
    name: Deploy to Cloudflare Pages
    needs: build
    runs-on: ubuntu-latest
    outputs:
      deployed_url: ${{ steps.out.outputs.deployed_url }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Download build artifact
        uses: actions/download-artifact@v4
        with:
          name: frontend-dist
          path: dist

      - name: Determine project name and branch
        id: pname
        env:
          INPUT_MODE: ${{ inputs.mode }}
          INPUT_PR: ${{ inputs.pr_number }}
        run: |
          set -euo pipefail
          # Prefer manual input, then repo variable, fallback to repo-name
          INPUT_NAME='${{ inputs.project_name }}'
          VAR_NAME='${{ vars.CF_PAGES_PROJECT_NAME }}'
          if [ -n "$INPUT_NAME" ]; then PNAME="$INPUT_NAME"; 
          elif [ -n "$VAR_NAME" ]; then PNAME="$VAR_NAME"; 
          else PNAME="${GITHUB_REPOSITORY##*/}-frontend"; fi
          # Determine branch for Pages
          if [ "${INPUT_MODE}" = "pr" ]; then
            if [ -z "${INPUT_PR}" ]; then echo "pr_number is required when mode=pr"; exit 1; fi
            PBRANCH="pr-${INPUT_PR}"
          else
            PBRANCH="main"
          fi
          echo "project_name=$PNAME" >> $GITHUB_OUTPUT
          echo "branch=$PBRANCH" >> $GITHUB_OUTPUT

      - name: Deploy using Cloudflare Wrangler
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          command: pages deploy dist --project-name=${{ steps.pname.outputs.project_name }} --branch=${{ steps.pname.outputs.branch }}

      - name: Compute deployed URL
        id: out
        env:
          PNAME: ${{ steps.pname.outputs.project_name }}
          PBRANCH: ${{ steps.pname.outputs.branch }}
        run: |
          set -euo pipefail
          if [ "$PBRANCH" = "main" ]; then
            URL="https://${PNAME}.pages.dev"
          else
            URL="https://${PBRANCH}.${PNAME}.pages.dev"
          fi
          echo "deployed_url=$URL" >> $GITHUB_OUTPUT