---
name: 'Flake Input Updater'
inputs:
  base:
    default: 'main'
    required: false
  name:
    default: 'flake bump bot'
    required: false
  email:
    default: 'bot@nix.flake'
    required: false
  title:
    default: '[bot]: flake bump'
    required: false

runs:
  using: "composite"
  steps:
    - name: "Configure git"
      shell: bash
      run: |
        echo "Configuring git"
        git config user.name "${{ inputs.name }}" >> $GITHUB_OUTPUT
        git config user.email "${{ inputs.email }}" >> $GITHUB_OUTPUT
    - name: "Create branch"
      id: clone
      shell: bash
      run: |
        BRANCH="flake-update-$(date +%s)"
        echo "Creating branch $BRANCH"
        git fetch --all
        git checkout -b "$BRANCH"
        echo branch=$BRANCH >> $GITHUB_OUTPUT
    - name: "Check for updates"
      id: changes
      shell: bash
      run: |
        echo "Checking for flake updates"
        nix flake update
        if git status --porcelain; then
          echo change=true >> $GITHUB_OUTPUT
        else
          echo change=false >> $GITHUB_OUTPUT
        fi
    - name: "Push + create PR"
      shell: bash
      id: push
      if: steps.changes.outputs.change == 'true'
      run: |
        echo "Creating PR for branch ${{ steps.clone.outputs.branch }}"
        git add flake.lock
        git commit -m "${{ inputs.title }}"
        git push --force-with-lease origin "${{ steps.clone.outputs.branch }}"

        RESPONSE=$(curl -X 'POST' \
          "$GITHUB_SERVER_URL/api/v1/repos/$GITHUB_REPOSITORY/pulls" \
          -H 'accept: application/json' \
          -H "Authorization: token $GITHUB_TOKEN" \
          -H 'Content-type: application/json' \
          -d '{
            "base": "${{ inputs.base }}",
            "head": "${{ steps.clone.outputs.branch }}",
            "title": "automated flake update"
          }')

        NUMBER=$(echo $RESPONSE | jq -r '.number')
        echo "Created PR $NUMBER."
        echo NUMBER=$NUMBER >> $GITHUB_OUTPUT
    - name: "Set automerge on PR"
      shell: bash
      if: steps.changes.outputs.change == 'true' && steps.push.outputs.number != 'null'
      run: |
        RESPONSE=$(curl -X 'POST' \
          "$GITHUB_SERVER_URL/api/v1/repos/$GITHUB_REPOSITORY/pulls/${{ steps.push.outputs.number }}/merge" \
          -H 'accept: application/json' \
          -H "Authorization: token $GITHUB_TOKEN" \
          -H 'Content-Type: application/json' \
          -d '{
            "Do": "merge",
            "merge_when_checks_succeed": true,
            "delete_branch_after_merge": true
          }')
        echo $RESPONSE