name: Release

on:
  workflow_dispatch:
    inputs:
      version:
        description: "Release version, e.g. 0.2.0. Leave empty to bump the patch number."
        required: false
        type: string

permissions:
  contents: write

jobs:
  prepare:
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.version.outputs.version }}
      tag: ${{ steps.version.outputs.tag }}
      release_id: ${{ steps.release.outputs.release_id }}
    steps:
      - uses: actions/checkout@v7

      - name: Determine version
        id: version
        run: |
          if [ -n "${{ inputs.version }}" ]; then
            VERSION="${{ inputs.version }}"
            VERSION="${VERSION#v}"
          else
            CURRENT=$(jq -r .version src-tauri/tauri.conf.json)
            IFS=. read -r MAJOR MINOR PATCH <<< "$CURRENT"
            VERSION="$MAJOR.$MINOR.$((PATCH + 1))"
          fi
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "tag=v$VERSION" >> "$GITHUB_OUTPUT"
          echo "Releasing v$VERSION"

      - name: Bump version in manifests
        env:
          VERSION: ${{ steps.version.outputs.version }}
        run: |
          tmp=$(mktemp)
          jq --arg v "$VERSION" '.version = $v' src-tauri/tauri.conf.json > "$tmp" && mv "$tmp" src-tauri/tauri.conf.json
          jq --arg v "$VERSION" '.version = $v' package.json > "$tmp" && mv "$tmp" package.json
          sed -i "0,/^version = \".*\"/s//version = \"$VERSION\"/" src-tauri/Cargo.toml

      - name: Commit and tag
        env:
          TAG: ${{ steps.version.outputs.tag }}
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add src-tauri/tauri.conf.json package.json src-tauri/Cargo.toml
          git commit -m "chore(release): $TAG"
          for attempt in 1 2 3 4 5; do
            git fetch origin main
            git rebase origin/main
            if git push origin HEAD; then
              break
            fi
            if [ "$attempt" = "5" ]; then
              echo "::error::main kept advancing; could not push release bump after 5 attempts."
              exit 1
            fi
            echo "main advanced during release; rebasing and retrying ($attempt)…"
            sleep 3
          done
          git tag "$TAG"
          git push origin "$TAG"

      - name: Create draft release
        id: release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          TAG: ${{ steps.version.outputs.tag }}
        run: |
          gh release create "$TAG" --draft --title "Margin Docs $TAG" --notes "Release $TAG"
          ID=$(gh release view "$TAG" --json databaseId --jq .databaseId)
          echo "release_id=$ID" >> "$GITHUB_OUTPUT"

  build:
    needs: prepare
    # One runner, no matrix. The app is macOS only, and a universal build links the aarch64 and
    # x86_64 slices into a single bundle, so there is exactly one thing to build and nothing for a
    # matrix to vary. A matrix of one is where the Linux row survived long after the app stopped
    # shipping on Linux; if a second target ever arrives, putting the matrix back is a small change.
    runs-on: macos-26
    steps:
      - uses: actions/checkout@v7
        with:
          ref: ${{ needs.prepare.outputs.tag }}

      - uses: actions/setup-node@v6
        with:
          node-version: 26

      - uses: pnpm/action-setup@v6
        with:
          version: 10

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: aarch64-apple-darwin,x86_64-apple-darwin

      - uses: swatinem/rust-cache@v2
        with:
          workspaces: src-tauri -> target

      - name: Install frontend dependencies
        run: pnpm install --frozen-lockfile

      - name: Build and upload
        uses: tauri-apps/tauri-action@v0
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
        with:
          releaseId: ${{ needs.prepare.outputs.release_id }}
          args: "--target universal-apple-darwin --config src-tauri/tauri.release.conf.json"

  publish:
    needs: [prepare, build]
    runs-on: ubuntu-latest
    steps:
      - name: Verify manifest is complete, then publish
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          TAG: ${{ needs.prepare.outputs.tag }}
        run: |
          gh release download "$TAG" --repo "$REPO" --pattern latest.json --output latest.json --clobber
          echo "Platforms in latest.json:"
          jq '.platforms | keys' latest.json
          # A universal build emits one .app.tar.gz, but tauri-action writes it into latest.json
          # under both darwin-aarch64 and darwin-x86_64, pointing them at the same file and the same
          # signature. It has to: an installed copy asks the manifest for the architecture it is
          # running on and never for the universal key, so a manifest that only carried
          # darwin-universal would offer nobody an update. Those two keys are the whole manifest for
          # this app, and a release that is missing either one is a release half the users cannot
          # take.
          for key in darwin-aarch64 darwin-x86_64; do
            if ! jq -e ".platforms[\"$key\"].url" latest.json > /dev/null; then
              echo "::error::latest.json is missing platform '$key': refusing to publish a partial update manifest. Re-run the release."
              exit 1
            fi
          done
          gh release edit "$TAG" --repo "$REPO" --draft=false --latest