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

          parse_semver_core() {
            printf '%s' "$1" | sed -E 's/^([0-9]+\.[0-9]+\.[0-9]+).*/\1/'
          }

          BASE_CORE="$(parse_semver_core "$BASE_VERSION")"
          PR_CORE="$(parse_semver_core "$PR_VERSION")"

          if ! printf '%s' "$BASE_CORE" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$'; then
            echo "Base version is not valid semver: $BASE_VERSION"
            exit 1
          fi

          if ! printf '%s' "$PR_CORE" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$'; then
            echo "PR version is not valid semver: $PR_VERSION"
            exit 1
          fi

          BASE_MAJOR="${BASE_CORE%%.*}"
          BASE_REST="${BASE_CORE#*.}"
          BASE_MINOR="${BASE_REST%%.*}"
          BASE_PATCH="${BASE_REST#*.}"

          PR_MAJOR="${PR_CORE%%.*}"
          PR_REST="${PR_CORE#*.}"
          PR_MINOR="${PR_REST%%.*}"
          PR_PATCH="${PR_REST#*.}"

          if [ "$PR_MAJOR" -lt "$BASE_MAJOR" ]; then
            echo "pubspec.yaml version must be greater than base version ($BASE_VERSION -> $PR_VERSION)."
            exit 1
          fi

          if [ "$PR_MAJOR" -eq "$BASE_MAJOR" ] && [ "$PR_MINOR" -lt "$BASE_MINOR" ]; then
            echo "pubspec.yaml version must be greater than base version ($BASE_VERSION -> $PR_VERSION)."
            exit 1
          fi

          if [ "$PR_MAJOR" -eq "$BASE_MAJOR" ] && [ "$PR_MINOR" -eq "$BASE_MINOR" ] && [ "$PR_PATCH" -le "$BASE_PATCH" ]; then
            echo "pubspec.yaml version must be at least 0.0.1 greater than base version ($BASE_VERSION -> $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 and create Gitea release on push to main
        env:
          PUB_CREDENTIALS_JSON: ${{ secrets.PUB_CREDENTIALS_JSON }}
          RELEASE_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          FALLBACK_RELEASE_TOKEN: ${{ secrets.GITEA_RELEASE_TOKEN }}
        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

          TOKEN="${RELEASE_TOKEN:-}"
          if [ -z "$TOKEN" ]; then
            TOKEN="${FALLBACK_RELEASE_TOKEN:-}"
          fi

          if [ -z "$TOKEN" ]; then
            echo "Missing release token. Provide default workflow token or GITEA_RELEASE_TOKEN."
            exit 1
          fi

          SERVER_URL="${GITHUB_SERVER_URL:-${GITEA_SERVER_URL:-}}"
          REPO_PATH="${GITHUB_REPOSITORY:-${GITEA_REPOSITORY:-}}"

          if [ -z "$SERVER_URL" ] || [ -z "$REPO_PATH" ]; then
            echo "Missing repository context required for Gitea API release creation."
            exit 1
          fi

          TAG="v${PACKAGE_VERSION}"
          RELEASE_BY_TAG_URL="${SERVER_URL}/api/v1/repos/${REPO_PATH}/releases/tags/${TAG}"

          if curl -fsS -H "Authorization: token ${TOKEN}" "$RELEASE_BY_TAG_URL" >/dev/null; then
            echo "Release ${TAG} already exists; skipping release creation."
            exit 0
          fi

          CREATE_RELEASE_URL="${SERVER_URL}/api/v1/repos/${REPO_PATH}/releases"
          RELEASE_PAYLOAD="{\"tag_name\":\"${TAG}\",\"target\":\"${GITHUB_SHA}\",\"target_commitish\":\"${GITHUB_SHA}\",\"title\":\"${TAG}\",\"name\":\"${TAG}\",\"note\":\"Release ${TAG}\",\"body\":\"Release ${TAG}\",\"draft\":false,\"prerelease\":false}"

          HTTP_CODE="$(curl -sS -o /tmp/gitea-release-response.json -w '%{http_code}' \
            -X POST "$CREATE_RELEASE_URL" \
            -H "Authorization: token ${TOKEN}" \
            -H 'Content-Type: application/json' \
            -d "$RELEASE_PAYLOAD")"

          if [ "$HTTP_CODE" = "201" ]; then
            echo "Created Gitea release for ${TAG}."
          elif [ "$HTTP_CODE" = "409" ]; then
            echo "Release or tag ${TAG} already exists; treating as success."
          else
            echo "Failed to create Gitea release. HTTP ${HTTP_CODE}."
            cat /tmp/gitea-release-response.json
            exit 1
          fi