name: Automatic Release

on:
  push:
    branches:
      - main
      - dev
  workflow_dispatch:

jobs:
  release:
    name: Create Release
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Bun
        uses: oven-sh/setup-bun@v1
        with:
          bun-version: latest

      - name: Install dependencies
        run: bun install
        shell: bash

      - name: Extract base version
        id: extract
        run: |
          # Extract base version (major.minor.patch) from scripts/build.mjs using pure shell (grep/sed)
          # This locates the first quoted semver-like string in the build script (e.g. "1.1.5-4")
          if [ ! -f scripts/build.mjs ]; then
            echo "scripts/build.mjs not found" >&2
            exit 1
          fi
          # Print a snippet of the file for debugging in workflow logs
          echo '--- scripts/build.mjs (snippet) ---' >&2
          sed -n '1,200p' scripts/build.mjs >&2 || true

          # Primary extraction: find the first quoted semver (may include prerelease suffix)
          raw=$(grep -m1 -oE '"[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z.-]+)?"' scripts/build.mjs | tr -d '"' | head -n1 || true)

          # Strip any prerelease suffix, keep only major.minor.patch
          version=$(printf '%s' "$raw" | sed -E 's/^([0-9]+\.[0-9]+\.[0-9]+).*/\1/')

          # Validate final result is exactly major.minor.patch
          if ! printf '%s' "$version" | grep -xE '^[0-9]+\.[0-9]+\.[0-9]+$' >/dev/null; then
            echo "Failed to extract a valid base version from scripts/build.mjs" >&2
            sed -n '1,200p' scripts/build.mjs >&2 || true
            exit 1
          fi

          echo "version=$version" >> $GITHUB_OUTPUT
        shell: bash

      - name: Prepare tag (detect dev branch and compute prerelease numeric suffix)
        id: prepare
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -euo pipefail

          # Derive branch and base version
          ref="${GITHUB_REF#refs/heads/}"
          version="${{ steps.extract.outputs.version }}"

          echo "[debug] GITHUB_REF=$GITHUB_REF" >&2
          echo "[debug] branch=$ref" >&2
          echo "[debug] base version=$version" >&2

          prerelease="false"
          tag="${version}"

          if [ "$ref" = "dev" ]; then
            prerelease="true"

            # Ensure we have remote tags to inspect
            git fetch --tags --prune origin

            # Collect exact-match prerelease numbers for tags that start with "<version>-"
            # This avoids partial matches like '1.1.41' when base version is '1.1.4'
            : > /tmp/pr_nums || true

            # Use ls-remote to avoid depending on local clone tags; normalize tag names:
            #  - strip refs/tags/
            #  - remove annotated tag suffix ^{} if present
            #  - remove leading v prefix
            git ls-remote --tags origin | awk '{print $2}' \
              | sed 's@refs/tags/@@' \
              | sed 's/\\^{}$//' \
              | sed 's/^v//' \
              | while IFS= read -r tagname; do
                  if [[ "$tagname" == "${version}-"* ]]; then
                    num="${tagname#${version}-}"
                    if [[ "$num" =~ ^[0-9]+$ ]]; then
                      echo "$num" >> /tmp/pr_nums
                    fi
                  fi
                done || true

            echo "[debug] matching prerelease numbers:" >&2
            cat /tmp/pr_nums 2>/dev/null || echo "(none)" >&2

            max=0
            if [ -f /tmp/pr_nums ]; then
              while read -r n; do
                if [ -n "$n" ] && [[ "$n" =~ ^[0-9]+$ ]]; then
                  if [ "$n" -gt "$max" ]; then
                    max="$n"
                  fi
                fi
              done < /tmp/pr_nums || true
            fi

            next=$((max + 1))
            tag="${version}-${next}"
          fi

          echo "[debug] computed tag=${tag}" >&2

          # Expose outputs
          echo "tag=${tag}" >> $GITHUB_OUTPUT
          echo "prerelease=${prerelease}" >> $GITHUB_OUTPUT

          # Ensure a committer identity is configured for tagging (CI runners don't have one by default)
          git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
          git config user.name "${GITHUB_ACTOR}"

          # Create annotated tag locally and push it if not already present on the remote.
          if ! git rev-parse -q --verify "refs/tags/${tag}" >/dev/null; then
            git tag -a "${tag}" -m "Release ${tag}"
            # push tag via token-authenticated remote so workflow can push tags
            git push "https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" "refs/tags/${tag}"
          else
            echo "Tag ${tag} already exists"
          fi
        shell: bash

      - name: Build (if needed)
        run: bun run build
        shell: bash

      - name: Create Release
        uses: softprops/action-gh-release@v1
        with:
          # Use the computed tag (e.g. "1.1.4" or "1.1.4-1")
          tag_name: ${{ steps.prepare.outputs.tag }}
          name: Release ${{ steps.prepare.outputs.tag }}
          prerelease: ${{ steps.prepare.outputs.prerelease }}
          files: |
            dist/shiggycord.js
            dist/shiggycord.min.js
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}