name: ESP32 Build & Release

on:
  push:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest
    container:
      image: espressif/idf:v5.5

    steps:
      # ------------------------------------------------------------
      # Checkout (Native Git - No Node.js required)
      # ------------------------------------------------------------
      - name: Checkout
        shell: bash
        env:
          GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          git config --global --add safe.directory "$GITHUB_WORKSPACE"
          SERVER_HOST=$(echo "${{ github.server_url }}" | sed -e 's|^https://||' -e 's|^http://||')
          git init
          git remote add origin "https://${GITEA_TOKEN}@${SERVER_HOST}/${{ github.repository }}.git" || \
          git remote set-url origin "https://${GITEA_TOKEN}@${SERVER_HOST}/${{ github.repository }}.git"
          git fetch --depth 1 origin "${{ github.sha }}" || git fetch --depth 1 origin main
          git checkout -f FETCH_HEAD

      # ------------------------------------------------------------
      # Build firmware & merged binary
      # ------------------------------------------------------------
      - name: Build firmware
        shell: bash
        run: |
          . /opt/esp/idf/export.sh
          idf.py --version
          idf.py set-target esp32
          idf.py build
          idf.py merge-bin

      # ------------------------------------------------------------
      # Prepare release artifacts & calculate hashes
      # ------------------------------------------------------------
      - name: Prepare release
        shell: bash
        run: |
          mkdir -p release

          # Primary OTA application binary
          if [ -f build/mtg-rfid-companion.bin ]; then
            cp build/mtg-rfid-companion.bin release/mtg-rfid-companion.bin
            cp build/mtg-rfid-companion.bin release/firmware.bin
          else
            echo "ERROR: build/mtg-rfid-companion.bin not found!"
            exit 1
          fi

          # Merged binary for USB factory flashing
          if [ -f build/merged-binary.bin ]; then
            cp build/merged-binary.bin release/merged-firmware.bin
          fi

          # ELF for debugging
          find build -maxdepth 1 -type f -name "*.elf" -exec cp {} release/ \;

          # Calculate hashes
          BIN_SHA256=$(sha256sum release/mtg-rfid-companion.bin | awk '{print $1}')
          IMG_SHA256=$(python3 -c "with open('release/mtg-rfid-companion.bin','rb') as f: f.seek(-32,2); print(f.read().hex())")

          echo "BIN_SHA256=${BIN_SHA256}" >> $GITHUB_ENV
          echo "IMG_SHA256=${IMG_SHA256}" >> $GITHUB_ENV

          echo "Firmware SHA256: ${BIN_SHA256}" > release/firmware.sha256
          echo "Image SHA256: ${IMG_SHA256}" >> release/firmware.sha256
          echo "Commit: ${{ github.sha }}" >> release/firmware.sha256

          echo "OTA Release prepared:"
          echo "  Binary: release/mtg-rfid-companion.bin"
          echo "  File SHA-256: ${BIN_SHA256}"
          echo "  Image SHA-256: ${IMG_SHA256}"
          ls -lh release/

      # ------------------------------------------------------------
      # Delete existing "latest" release & tag
      # ------------------------------------------------------------
      - name: Delete existing latest release
        shell: bash
        env:
          GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          API="${{ github.server_url }}/api/v1"

          echo "Removing existing latest release..."

          curl -fsSL \
            -X DELETE \
            -H "Authorization: token ${GITEA_TOKEN}" \
            "${API}/repos/${{ github.repository }}/releases/tags/latest" \
            || true

          # Delete the tag as well
          curl -fsSL \
            -X DELETE \
            -H "Authorization: token ${GITEA_TOKEN}" \
            "${API}/repos/${{ github.repository }}/tags/latest" \
            || true

      # ------------------------------------------------------------
      # Create latest release and upload assets (Native API & Curl)
      # ------------------------------------------------------------
      - name: Create latest release
        shell: bash
        env:
          GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          API="${{ github.server_url }}/api/v1/repos/${{ github.repository }}"

          export RELEASE_BODY="Automatically built from the \`main\` branch.

          Commit:
          ${{ github.sha }}

          SHA256:
          ${{ env.IMG_SHA256 }}

          File-SHA256:
          ${{ env.BIN_SHA256 }}

          ESP-IDF:
          5.5

          Target:
          ESP32

          This release is automatically replaced on every push to \`main\`."

          REL_ID=$(python3 -c "import urllib.request, json, os
          api = '${API}'
          token = os.environ['GITEA_TOKEN']
          headers = {'Authorization': f'token {token}', 'Content-Type': 'application/json'}
          payload = {
              'tag_name': 'latest',
              'target_commitish': 'main',
              'name': 'Latest ESP32 Firmware',
              'body': os.environ.get('RELEASE_BODY', ''),
              'draft': False,
              'prerelease': False
          }
          req = urllib.request.Request(f'{api}/releases', data=json.dumps(payload).encode('utf-8'), headers=headers, method='POST')
          with urllib.request.urlopen(req) as resp:
              print(json.loads(resp.read().decode('utf-8'))['id'])
          ")

          echo "Created release ID: ${REL_ID}"

          for fpath in release/*; do
            [ -f "$fpath" ] || continue
            echo "Uploading $fpath..."
            curl -fsSL \
              -X POST \
              -H "Authorization: token ${GITEA_TOKEN}" \
              -F "attachment=@${fpath}" \
              "${API}/releases/${REL_ID}/assets"
          done

          echo "Release created and all assets uploaded successfully!"