# A workflow to delete (soft-delete) a release branch by renaming it.
#
# The branch will be renamed from its original name to deleted/{original_name}.
# For example, oss_release/v0.2025.01.01.00.00 becomes
# deleted/oss_release/v0.2025.01.01.00.00.
#
# This workflow will fail if:
# - The branch doesn't start with the oss_release/ prefix
# - The release has an entry in channel_versions.json (i.e., it's deployed)

name: Delete Release
on:
  workflow_dispatch:
    inputs:
      branch:
        description: 'The OSS release branch to delete (e.g., oss_release/v0.2025.01.01.00.00.oss)'
        required: true
        type: string
      confirmation:
        description: 'Type DELETE to confirm'
        required: true
        type: string

jobs:
  delete_release:
    name: Delete Release Branch
    runs-on: ubuntu-latest
    steps:
      - name: Verify confirmation
        run: |
          if [[ "${{ inputs.confirmation }}" != "DELETE" ]]; then
            echo "::error::You must type DELETE to confirm branch deletion. \
              If you're unsure about deleting, ask a TL in #oncall-client before running this workflow."
            exit 1
          fi
        shell: bash

      - name: Validate release branch
        id: validate
        run: |
          BRANCH_NAME="${{ inputs.branch }}"
          
          # Validate that this is an OSS release branch.
          if [[ ! "$BRANCH_NAME" =~ ^oss_release/ ]]; then
            echo "::error::Branch '$BRANCH_NAME' is not an OSS release branch." && exit 1
          fi
          CHANNEL="oss"
          
          # Extract the version base from the branch name
          # e.g., "oss_release/v0.2025.01.26.12.30.oss" -> "v0.2025.01.26.12.30.oss"
          VERSION_BASE="$(echo "$BRANCH_NAME" | sed -r 's|^oss_release/(.*)$|\1|')"
          
          echo "branch_name=$BRANCH_NAME" >> $GITHUB_OUTPUT
          echo "new_branch_name=deleted/$BRANCH_NAME" >> $GITHUB_OUTPUT
          echo "channel=$CHANNEL" >> $GITHUB_OUTPUT
          echo "version_base=$VERSION_BASE" >> $GITHUB_OUTPUT
        shell: bash

      - name: Check if release has changelog in channel_versions.json
        id: check_deployed
        env:
          CHANNEL: ${{ steps.validate.outputs.channel }}
          VERSION_BASE: ${{ steps.validate.outputs.version_base }}
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Fetch channel_versions.json from the channel-versions repository
          CHANNEL_VERSIONS=$(gh api repos/warpdotdev/channel-versions/contents/channel_versions.json --jq '.content' | base64 -d)
          
          # Fail fast if the channel section is missing from channel_versions.json
          CHANNEL_EXISTS=$(echo "$CHANNEL_VERSIONS" | jq -r --arg channel "$CHANNEL" 'has("changelogs") and (.changelogs | has($channel))')
          if [[ "$CHANNEL_EXISTS" != "true" ]]; then
            echo "::error::channel_versions.json is missing the 'changelogs.$CHANNEL' section. Cannot safely determine if release is deployed."
            exit 1
          fi
          
          # Check if any key in the changelogs section for this channel starts with the version base
          # Keys are like "v0.2025.01.26.12.30.stable_01" and version_base is "v0.2025.01.26.12.30.stable"
          MATCHING_ENTRIES=$(echo "$CHANNEL_VERSIONS" | jq -r --arg channel "$CHANNEL" --arg version "$VERSION_BASE" \
            '.changelogs[$channel] | keys[] | select(startswith($version))')
          
          if [[ -n "$MATCHING_ENTRIES" ]]; then
            echo "::error::Cannot delete release branch: version '$VERSION_BASE' has changelog entries in channel_versions.json:"
            echo "$MATCHING_ENTRIES"
            exit 1
          fi
          
          echo "::notice::Release has no changelog in channel_versions.json, safe to delete."
        shell: bash

      - name: Checkout repository
        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
        with:
          ref: ${{ inputs.branch }}

      - name: Rename branch to deleted/
        env:
          BRANCH_NAME: ${{ steps.validate.outputs.branch_name }}
          NEW_BRANCH_NAME: ${{ steps.validate.outputs.new_branch_name }}
        run: |
          echo "Renaming branch '$BRANCH_NAME' to '$NEW_BRANCH_NAME'"
          
          # Push the current HEAD to the new branch name
          git push origin "HEAD:refs/heads/$NEW_BRANCH_NAME"
          
          # Delete the original branch
          git push origin --delete "$BRANCH_NAME"
          
          echo "::notice::Successfully renamed branch '$BRANCH_NAME' to '$NEW_BRANCH_NAME'"
        shell: bash