name: Discord Notification

on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      tag_name:
        description: "Tag name (leave empty for latest release)"
        required: false
        type: string
      custom_title:
        description: "Custom title for the release notification"
        required: false
        type: string

jobs:
  Discord:
    runs-on: ubuntu-latest
    name: Discord Notifier
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Get release info
        id: release-info
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            # For manual trigger, get the latest release or use the input
            if [ -n "${{ github.event.inputs.tag_name }}" ]; then
              TAG_NAME="${{ github.event.inputs.tag_name }}"
            else
              TAG_NAME=$(gh release list --limit 1 --json tagName --jq '.[0].tagName')
            fi
            
            # Get release info via GitHub CLI
            RELEASE_INFO=$(gh release view "$TAG_NAME" --json name,body,url,author,publishedAt,tagName)
            
            echo "tag_name=$(echo "$RELEASE_INFO" | jq -r '.tagName')" >> $GITHUB_OUTPUT
            echo "name=$(echo "$RELEASE_INFO" | jq -r '.name')" >> $GITHUB_OUTPUT
            
            # Use EOF for the body which may contain special characters
            echo "body<<EOF" >> $GITHUB_OUTPUT
            echo "$RELEASE_INFO" | jq -r '.body' >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
            
            echo "html_url=$(echo "$RELEASE_INFO" | jq -r '.url')" >> $GITHUB_OUTPUT
            echo "author_login=$(echo "$RELEASE_INFO" | jq -r '.author.login')" >> $GITHUB_OUTPUT
            echo "author_html_url=https://github.com/$(echo "$RELEASE_INFO" | jq -r '.author.login')" >> $GITHUB_OUTPUT
            echo "published_at=$(echo "$RELEASE_INFO" | jq -r '.publishedAt')" >> $GITHUB_OUTPUT
          else
            # For automatic trigger, use event data
            echo "tag_name=${{ github.event.release.tag_name }}" >> $GITHUB_OUTPUT
            echo "name=${{ github.event.release.name }}" >> $GITHUB_OUTPUT
            
            # Use EOF for the automatic release body as well
            echo "body<<EOF" >> $GITHUB_OUTPUT
            echo "${{ github.event.release.body }}" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
            
            echo "html_url=${{ github.event.release.html_url }}" >> $GITHUB_OUTPUT
            echo "author_login=${{ github.event.release.author.login }}" >> $GITHUB_OUTPUT
            echo "author_html_url=${{ github.event.release.author.html_url }}" >> $GITHUB_OUTPUT
            echo "published_at=${{ github.event.release.published_at }}" >> $GITHUB_OUTPUT
          fi
        env:
          GH_TOKEN: ${{ github.token }}

      - name: Get previous release
        id: previous-release
        run: |
          PREV_TAG=$(git tag --sort=-version:refname | grep -v '${{ steps.release-info.outputs.tag_name }}' | head -n1)
          echo "previous_tag=${PREV_TAG}" >> $GITHUB_OUTPUT

      - name: Get changed files since last release
        id: changed-files
        uses: tj-actions/changed-files@v44
        with:
          base_sha: ${{ steps.previous-release.outputs.previous_tag }}
          separator: "\n• "

      - name: Create Discord webhook payload
        run: |
          # Create a temporary JSON file
          cat > discord_payload.json << 'EOF'
          {
            "avatar_url": "https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png",
            "embeds": [
              {
                "title": "🚀 New Release: ${{ steps.release-info.outputs.tag_name }}${{ github.event.inputs.custom_title && ' - ' || '' }}${{ github.event.inputs.custom_title || '' }}",
                "description": "${{ steps.release-info.outputs.name }}",
                "url": "${{ steps.release-info.outputs.html_url }}",
                "color": 5763719,
                "thumbnail": {
                  "url": "https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png"
                },
                "fields": [
                  {
                    "name": "📦 Version",
                    "value": "`${{ steps.release-info.outputs.tag_name }}`",
                    "inline": true
                  },
                  {
                    "name": "👤 Released by",
                    "value": "[${{ steps.release-info.outputs.author_login }}](${{ steps.release-info.outputs.author_html_url }})",
                    "inline": true
                  },
                  {
                    "name": "📁 Repository",
                    "value": "[${{ github.event.repository.name }}](${{ github.event.repository.html_url }})",
                    "inline": true
                  },
                  {
                    "name": "🔗 Download",
                    "value": "[Release Page](${{ steps.release-info.outputs.html_url }})",
                    "inline": true
                  }
                ],
                "timestamp": "${{ steps.release-info.outputs.published_at }}",
                "footer": {
                  "text": "Workout Cool • Release",
                  "icon_url": "https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png"
                }
              }
            ]
          }
          EOF

      - name: Send Discord notification
        run: |
          curl -H "Content-Type: application/json" \
               -d @discord_payload.json \
               "${{ secrets.DISCORD_RELEASE_WEBHOOK }}"

# https://stackoverflow.com/a/68068674/19395252
# https://birdie0.github.io/discord-webhooks-guide/structure/embeds.html
# https://github.com/marketplace/actions/changed-files