name: CI and Release

on:
  pull_request:
    branches:
      - main
  push:
    branches:
      - main

jobs:
  format:
    name: format
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Dart
        uses: dart-lang/setup-dart@v1
      - name: Install dependencies
        run: dart pub get
      - name: Check formatting
        run: dart format --output=none --set-exit-if-changed .

  analyze:
    name: analyze
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Dart
        uses: dart-lang/setup-dart@v1
      - name: Install dependencies
        run: dart pub get
      - name: Run analyzer
        run: dart analyze --fatal-infos

  test:
    name: test
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Dart
        uses: dart-lang/setup-dart@v1
      - name: Install dependencies
        run: dart pub get
      - name: Run tests
        run: dart test

  pana:
    name: pana
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Dart
        uses: dart-lang/setup-dart@v1
      - name: Install dependencies
        run: dart pub get
      - name: Run pana and enforce full score
        run: |
          set -euo pipefail
          dart pub global activate pana
          export PATH="$PATH:$HOME/.pub-cache/bin"

          pana . | tee /tmp/pana.log

          SCORE_LINE="$(grep -Eo 'Points: [0-9]+/[0-9]+' /tmp/pana.log | tail -n1 || true)"
          if [ -z "$SCORE_LINE" ]; then
            echo "Could not parse pana score output."
            exit 1
          fi

          SCORE="${SCORE_LINE#Points: }"
          GOT="${SCORE%/*}"
          MAX="${SCORE#*/}"

          if [ "$GOT" -ne "$MAX" ]; then
            echo "Pana score must be full. Got $SCORE."
            exit 1
          fi

          echo "Pana full score confirmed: $SCORE"

  version_and_changelog:
    name: version-and-changelog
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Validate release metadata for PRs into main
        run: |
          set -euo pipefail

          if [ "${GITHUB_EVENT_NAME}" != "pull_request" ]; then
            echo "Not a pull_request event; skipping version/changelog gate."
            exit 0
          fi

          if [ -z "${GITHUB_BASE_REF:-}" ]; then
            echo "GITHUB_BASE_REF is not set for pull_request event."
            exit 1
          fi

          git fetch origin "${GITHUB_BASE_REF}" --depth=1

          PR_VERSION="$(sed -nE 's/^version:\s*([^[:space:]]+)\s*$/\1/p' pubspec.yaml | head -n1)"
          BASE_VERSION="$(git show "origin/${GITHUB_BASE_REF}:pubspec.yaml" | sed -nE 's/^version:\s*([^[:space:]]+)\s*$/\1/p' | head -n1)"

          if [ -z "$PR_VERSION" ] || [ -z "$BASE_VERSION" ]; then
            echo "Unable to read versions from pubspec.yaml."
            exit 1
          fi

          if [ "$PR_VERSION" = "$BASE_VERSION" ]; then
            echo "pubspec.yaml version was not updated (still $PR_VERSION)."
            exit 1
          fi

          if git diff --quiet "origin/${GITHUB_BASE_REF}...HEAD" -- CHANGELOG.md; then
            echo "CHANGELOG.md must be updated in the PR."
            exit 1
          fi

          if ! grep -Fq "## $PR_VERSION" CHANGELOG.md && ! grep -Fq "## [$PR_VERSION]" CHANGELOG.md; then
            echo "CHANGELOG.md must include a heading for version $PR_VERSION."
            exit 1
          fi

          echo "Version/changelog gate passed: $BASE_VERSION -> $PR_VERSION"

  publish:
    name: publish
    runs-on: ubuntu-latest
    needs:
      - format
      - analyze
      - test
      - pana
      - version_and_changelog
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Dart
        uses: dart-lang/setup-dart@v1
      - name: Publish package on push to main
        env:
          PUB_CREDENTIALS_JSON: ${{ secrets.PUB_CREDENTIALS_JSON }}
        run: |
          set -euo pipefail

          if [ "${GITHUB_EVENT_NAME}" != "push" ] || [ "${GITHUB_REF}" != "refs/heads/main" ]; then
            echo "Not a push to main; skipping publish."
            exit 0
          fi

          PACKAGE_NAME="$(sed -nE 's/^name:\s*([^[:space:]]+)\s*$/\1/p' pubspec.yaml | head -n1)"
          PACKAGE_VERSION="$(sed -nE 's/^version:\s*([^[:space:]]+)\s*$/\1/p' pubspec.yaml | head -n1)"

          if [ -z "$PACKAGE_NAME" ] || [ -z "$PACKAGE_VERSION" ]; then
            echo "Failed to parse package name/version from pubspec.yaml."
            exit 1
          fi

          if curl -fsSL "https://pub.dev/api/packages/${PACKAGE_NAME}" | grep -q "\"version\":\"${PACKAGE_VERSION}\""; then
            echo "${PACKAGE_NAME} ${PACKAGE_VERSION} is already published; skipping."
            exit 0
          fi

          if [ -z "${PUB_CREDENTIALS_JSON:-}" ]; then
            echo "Missing required secret PUB_CREDENTIALS_JSON."
            exit 1
          fi

          mkdir -p "$HOME/.pub-cache"
          printf '%s' "$PUB_CREDENTIALS_JSON" > "$HOME/.pub-cache/credentials.json"
          chmod 600 "$HOME/.pub-cache/credentials.json"

          dart pub get
          dart pub publish --dry-run
          dart pub publish --force