name: Unbound Release

on:
  workflow_call:
    inputs:
      tag_only:
        description: 'Set to true to only create tags without full releases'
        required: false
        default: false
        type: boolean

env:
  GITEA_URL: https://git.unbound.se
  RELEASE_TOKEN_FILE: /runner-secrets/release-token
  GIT_CLIFF_VERSION: "2.11.0"

jobs:
  preconditions:
    name: Check Preconditions
    runs-on: ubuntu-latest
    steps:
      - name: Validate token
        run: |
          if [ ! -r "${RELEASE_TOKEN_FILE}" ]; then
            echo "Release token file not found at ${RELEASE_TOKEN_FILE}"
            echo "This workflow requires the runner to have RELEASE_TOKEN configured."
            exit 1
          fi
          if [ ! -s "${RELEASE_TOKEN_FILE}" ]; then
            echo "Release token file is empty"
            exit 1
          fi
          echo "Release token found"

  changelog-and-pr:
    name: Generate Changelog and Handle PR
    runs-on: ubuntu-latest
    needs: preconditions
    if: github.ref_type == 'branch' && github.ref_name == github.event.repository.default_branch
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Install git-cliff
        run: |
          curl -sSfL "https://github.com/orhun/git-cliff/releases/download/v${GIT_CLIFF_VERSION}/git-cliff-${GIT_CLIFF_VERSION}-x86_64-unknown-linux-gnu.tar.gz" | tar xz
          sudo mv "git-cliff-${GIT_CLIFF_VERSION}/git-cliff" /usr/local/bin/
          git-cliff --version

      - name: Generate changelog
        run: |
          git-cliff --bump --unreleased --strip header > CHANGES.md
          git-cliff --bump | sed "s/[[:space:]]\+$//" > CHANGELOG.md

      - name: Get bumped version
        id: version
        run: |
          VERSION=$(git-cliff --bumped-version 2>/dev/null || echo "")
          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "${VERSION}" > VERSION

      - name: Check for changes
        id: check
        run: |
          LATEST=$(cat .version 2>/dev/null | jq -r '.version' 2>/dev/null || git describe --abbrev=0 --tags 2>/dev/null || echo '')
          VERSION=$(cat VERSION)
          if [ -n "${LATEST}" ] && [ "${VERSION}" = "${LATEST}" ]; then
            echo "has_changes=false" >> $GITHUB_OUTPUT
          else
            echo "has_changes=true" >> $GITHUB_OUTPUT
          fi

      - name: Create or update release PR
        if: steps.check.outputs.has_changes == 'true'
        env:
          REPOSITORY: ${{ github.repository }}
          DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
        run: |
          TOKEN=$(cat "${RELEASE_TOKEN_FILE}")
          VERSION=$(cat VERSION)
          OWNER=$(echo "${REPOSITORY}" | cut -d'/' -f1)
          REPO=$(echo "${REPOSITORY}" | cut -d'/' -f2)
          API_URL="${GITEA_URL}/api/v1/repos/${OWNER}/${REPO}"

          TITLE="chore(release): prepare for ${VERSION}"
          # Read CHANGES.md and escape for JSON
          DESCRIPTION=$(cat CHANGES.md | jq -Rs .)
          DESCRIPTION="${DESCRIPTION:1:-1}"  # Remove surrounding quotes from jq

          # Add squash merge reminder
          DESCRIPTION="${DESCRIPTION}

          ---
          **Note:** Please use **Squash Merge** when merging this PR."

          echo "Checking for existing release PRs..."
          PRS=$(curl -sf \
            -H "Authorization: token ${TOKEN}" \
            "${API_URL}/pulls?state=open" | jq '[.[] | select(.head.ref == "next-release")]')
          PR_INDEX=$(echo "${PRS}" | jq -r '.[0].number // empty')

          echo "Checking for existing next-release branch..."
          BRANCH_EXISTS=$(curl -sf \
            -H "Authorization: token ${TOKEN}" \
            "${API_URL}/branches/next-release" 2>/dev/null && echo "true" || echo "false")

          # Prepare CHANGELOG.md content
          CHANGELOG_CONTENT=$(base64 -w0 < CHANGELOG.md)

          # Prepare .version content
          VERSION_JSON=$(jq -n --arg v "${VERSION}" '{"version":$v}')
          VERSION_CONTENT=$(echo "${VERSION_JSON}" | base64 -w0)

          if [ "${BRANCH_EXISTS}" = "true" ]; then
            echo "Updating existing next-release branch..."

            # Get SHA of existing CHANGELOG.md
            CHANGELOG_SHA=$(curl -sf \
              -H "Authorization: token ${TOKEN}" \
              "${API_URL}/contents/CHANGELOG.md?ref=next-release" | jq -r '.sha // empty')

            # Update or create CHANGELOG.md
            if [ -n "${CHANGELOG_SHA}" ]; then
              curl -sf -X PUT \
                -H "Authorization: token ${TOKEN}" \
                -H "Content-Type: application/json" \
                --data "$(jq -n \
                  --arg content "${CHANGELOG_CONTENT}" \
                  --arg sha "${CHANGELOG_SHA}" \
                  --arg message "${TITLE}" \
                  --arg branch "next-release" \
                  '{content: $content, sha: $sha, message: $message, branch: $branch}')" \
                "${API_URL}/contents/CHANGELOG.md"
            else
              curl -sf -X POST \
                -H "Authorization: token ${TOKEN}" \
                -H "Content-Type: application/json" \
                --data "$(jq -n \
                  --arg content "${CHANGELOG_CONTENT}" \
                  --arg message "${TITLE}" \
                  --arg branch "next-release" \
                  '{content: $content, message: $message, branch: $branch, new_branch: $branch}')" \
                "${API_URL}/contents/CHANGELOG.md"
            fi

            # Get SHA of existing .version
            VERSION_SHA=$(curl -sf \
              -H "Authorization: token ${TOKEN}" \
              "${API_URL}/contents/.version?ref=next-release" | jq -r '.sha // empty')

            # Update or create .version
            if [ -n "${VERSION_SHA}" ]; then
              curl -sf -X PUT \
                -H "Authorization: token ${TOKEN}" \
                -H "Content-Type: application/json" \
                --data "$(jq -n \
                  --arg content "${VERSION_CONTENT}" \
                  --arg sha "${VERSION_SHA}" \
                  --arg message "${TITLE}" \
                  --arg branch "next-release" \
                  '{content: $content, sha: $sha, message: $message, branch: $branch}')" \
                "${API_URL}/contents/.version"
            else
              curl -sf -X POST \
                -H "Authorization: token ${TOKEN}" \
                -H "Content-Type: application/json" \
                --data "$(jq -n \
                  --arg content "${VERSION_CONTENT}" \
                  --arg message "${TITLE}" \
                  --arg branch "next-release" \
                  '{content: $content, message: $message, branch: $branch}')" \
                "${API_URL}/contents/.version"
            fi
          else
            echo "Creating new next-release branch with CHANGELOG.md..."
            curl -sf -X POST \
              -H "Authorization: token ${TOKEN}" \
              -H "Content-Type: application/json" \
              --data "$(jq -n \
                --arg content "${CHANGELOG_CONTENT}" \
                --arg message "${TITLE}" \
                --arg branch "next-release" \
                --arg new_branch "next-release" \
                '{content: $content, message: $message, branch: $branch, new_branch: $new_branch}')" \
              "${API_URL}/contents/CHANGELOG.md"

            echo "Adding .version to next-release branch..."
            curl -sf -X POST \
              -H "Authorization: token ${TOKEN}" \
              -H "Content-Type: application/json" \
              --data "$(jq -n \
                --arg content "${VERSION_CONTENT}" \
                --arg message "${TITLE}" \
                --arg branch "next-release" \
                '{content: $content, message: $message, branch: $branch}')" \
              "${API_URL}/contents/.version"
          fi

          if [ -n "${PR_INDEX}" ]; then
            echo "Updating existing PR #${PR_INDEX}..."
            curl -sf -X PATCH \
              -H "Authorization: token ${TOKEN}" \
              -H "Content-Type: application/json" \
              --data "$(jq -n \
                --arg title "${TITLE}" \
                --arg body "${DESCRIPTION}" \
                '{title: $title, body: $body}')" \
              "${API_URL}/pulls/${PR_INDEX}"
          else
            echo "Creating new PR..."
            curl -sf -X POST \
              -H "Authorization: token ${TOKEN}" \
              -H "Content-Type: application/json" \
              --data "$(jq -n \
                --arg title "${TITLE}" \
                --arg body "${DESCRIPTION}" \
                --arg head "next-release" \
                --arg base "${DEFAULT_BRANCH}" \
                '{title: $title, body: $body, head: $head, base: $base}')" \
              "${API_URL}/pulls"
          fi

  create-release:
    name: Create Release
    runs-on: ubuntu-latest
    needs: preconditions
    if: |
      github.ref_type == 'branch' &&
      github.ref_name == github.event.repository.default_branch &&
      inputs.tag_only != true
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Install git-cliff
        run: |
          curl -sSfL "https://github.com/orhun/git-cliff/releases/download/v${GIT_CLIFF_VERSION}/git-cliff-${GIT_CLIFF_VERSION}-x86_64-unknown-linux-gnu.tar.gz" | tar xz
          sudo mv "git-cliff-${GIT_CLIFF_VERSION}/git-cliff" /usr/local/bin/
          git-cliff --version

      - name: Generate changelog
        run: git-cliff --bump --unreleased --strip header > CHANGES.md

      - name: Get version
        id: version
        run: |
          VERSION=$(git-cliff --bumped-version 2>/dev/null || echo "")
          echo "version=${VERSION}" >> $GITHUB_OUTPUT

      - name: Create release
        env:
          REPOSITORY: ${{ github.repository }}
          DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
          VERSION: ${{ steps.version.outputs.version }}
        run: |
          TOKEN=$(cat "${RELEASE_TOKEN_FILE}")
          if [ ! -r .version ]; then
            echo "Version file not found"
            exit 0
          fi

          CURRENT_VERSION=$(cat .version 2>/dev/null | jq -r '.version')
          LATEST=$(git describe --abbrev=0 --tags 2>/dev/null || echo '')

          if [ -n "${LATEST}" ] && [ "${CURRENT_VERSION}" = "${LATEST}" ]; then
            echo "Version ${CURRENT_VERSION} already exists"
            exit 0
          fi

          OWNER=$(echo "${REPOSITORY}" | cut -d'/' -f1)
          REPO=$(echo "${REPOSITORY}" | cut -d'/' -f2)
          API_URL="${GITEA_URL}/api/v1/repos/${OWNER}/${REPO}"

          MESSAGE=$(cat CHANGES.md | jq -Rs .)
          MESSAGE="${MESSAGE:1:-1}"  # Remove surrounding quotes

          echo "Creating release ${VERSION}..."
          curl -sf -X POST \
            -H "Authorization: token ${TOKEN}" \
            -H "Content-Type: application/json" \
            --data "$(jq -n \
              --arg tag_name "${VERSION}" \
              --arg name "${VERSION}" \
              --arg body "${MESSAGE}" \
              --arg target "${DEFAULT_BRANCH}" \
              '{tag_name: $tag_name, name: $name, body: $body, target_commitish: $target}')" \
            "${API_URL}/releases"

  create-tag:
    name: Create Tag
    runs-on: ubuntu-latest
    needs: preconditions
    if: |
      github.ref_type == 'branch' &&
      github.ref_name == github.event.repository.default_branch &&
      inputs.tag_only == true
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Install git-cliff
        run: |
          curl -sSfL "https://github.com/orhun/git-cliff/releases/download/v${GIT_CLIFF_VERSION}/git-cliff-${GIT_CLIFF_VERSION}-x86_64-unknown-linux-gnu.tar.gz" | tar xz
          sudo mv "git-cliff-${GIT_CLIFF_VERSION}/git-cliff" /usr/local/bin/
          git-cliff --version

      - name: Get version
        id: version
        run: |
          VERSION=$(git-cliff --bumped-version 2>/dev/null || echo "")
          echo "version=${VERSION}" >> $GITHUB_OUTPUT

      - name: Create tag
        env:
          REPOSITORY: ${{ github.repository }}
          DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
          VERSION: ${{ steps.version.outputs.version }}
        run: |
          TOKEN=$(cat "${RELEASE_TOKEN_FILE}")
          if [ ! -r .version ]; then
            echo "Version file not found"
            exit 0
          fi

          CURRENT_VERSION=$(cat .version 2>/dev/null | jq -r '.version')
          LATEST=$(git describe --abbrev=0 --tags 2>/dev/null || echo '')

          if [ -n "${LATEST}" ] && [ "${CURRENT_VERSION}" = "${LATEST}" ]; then
            echo "Version ${CURRENT_VERSION} already exists"
            exit 0
          fi

          OWNER=$(echo "${REPOSITORY}" | cut -d'/' -f1)
          REPO=$(echo "${REPOSITORY}" | cut -d'/' -f2)
          API_URL="${GITEA_URL}/api/v1/repos/${OWNER}/${REPO}"

          echo "Creating tag ${VERSION}..."
          curl -sf -X POST \
            -H "Authorization: token ${TOKEN}" \
            -H "Content-Type: application/json" \
            --data "$(jq -n \
              --arg tag_name "${VERSION}" \
              --arg target "${DEFAULT_BRANCH}" \
              --arg message "${VERSION}" \
              '{tag_name: $tag_name, target: $target, message: $message}')" \
            "${API_URL}/tags"