name: Update Changelog

on:
  workflow_dispatch:
    inputs:
      type:
        description: "Type of when to retreive commits from"
        options: ["date", "tag", "commit"]
        required: true
        type: choice
        default: "date"
      start:
        description: "Date '2021-01-01' or tag 'v1.0.0' or commit 'sha'"
        required: true
      changelog_path:
        description: "The value associated with the type."
        required: true
        default: "CHANGELOG.md"
      prefix:
        description: "Prefix for the changelog update"
        required: true
        default: "changelog-for-"

env:
  GH_TOKEN: ${{ secrets.YDBOT_TOKEN }}

jobs:
  gather-prs:
    runs-on: ubuntu-latest
    outputs:
      prs: ${{ steps.pr-list.outputs.prs }}
    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Get merged PRs
        id: pr-list
        run: |
          TYPE="${{ github.event.inputs.type }}"
          START="${{ github.event.inputs.start }}"
          BRANCH="${GITHUB_REF_NAME}"

          echo "::notice:: branch = ${GITHUB_REF_NAME}, start = $START"

          if [ "$TYPE" == "date" ]; then
            echo "Getting PRs since date: $START"
            PRS=$(gh pr list --state merged --json number,title,baseRefName,mergedAt --jq ".[] | select(.baseRefName == \"$BRANCH\" and .mergedAt >= \"$START\") | {id: .number}" | jq -c -s ".")
          elif [ "$TYPE" == "tag" ]; then
            echo "Fetching tags from remote"
            git fetch --tags
            echo "Getting PRs since tag: $START"
            COMMIT=$(git rev-list -n 1 $START)
            PRS=$(gh pr list --state merged --json number,title,baseRefName,mergedAt --jq ".[] | select(.baseRefName == \"$BRANCH\" and .mergeCommit.oid >= \"$COMMIT\") | {id: .number}" | jq -c -s ".")
          elif [ "$TYPE" == "commit" ]; then
            echo "Getting PRs since commit: $START"
            PRS=$(gh pr list --state merged --json number,title,baseRefName,mergedAt --jq ".[] | select(.baseRefName == \"$BRANCH\" and .mergeCommit.oid >= \"$START\") | {id: .number}" | jq -c -s ".")
          else
            echo "::error::Invalid type: $TYPE"
            exit 1
          fi

          if [ -z "$PRS" ]; then
            PRS="[]"
          fi
          echo "$PRS" > prs.json
          echo "prs=$PRS" >> "$GITHUB_OUTPUT"

      - name: Debug PR list output
        run: |
          cat prs.json

      - name: Upload PRs JSON
        uses: actions/upload-artifact@v4
        with:
          name: prs-json
          path: prs.json

  update-changelog:
    needs: gather-prs
    runs-on: ubuntu-latest

    steps:
      - name: Check out the repository
        uses: actions/checkout@v4

      - name: Update Changelog
        uses: ./.github/actions/update_changelog 
        env:
          YDBOT_TOKEN: ${{ secrets.YDBOT_TOKEN }}
        with:
          pr_data: "${{ needs.gather-prs.outputs.prs }}"
          changelog_path: "${{ github.event.inputs.changelog_path }}"
          base_branch: "${GITHUB_REF_NAME}"
          suffix: "${{ github.event.inputs.start }}"