#/
# @license Apache-2.0
#
# Copyright (c) 2024 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#/

# Workflow name:
name: slash_commands

# Workflow triggers:
on:
  issue_comment:
    types:
      - created
      - edited

# Workflow jobs:
jobs:

  # Define a job for adding an initial reaction:
  add_initial_reaction:

    # Define a display name:
    name: 'Add initial reaction'

    # Define the type of virtual host machine:
    runs-on: ubuntu-latest

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib')

    # Define the job's steps:
    steps:
      # Add "bot: In progress" label to the issue / PR:
      - name: 'Add in-progress label'
        # Pin action to full length commit SHA
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
          script: |
            github.rest.issues.addLabels({
              'owner': context.repo.owner,
              'repo': context.repo.repo,
              'issue_number': context.issue.number,
              'labels': ['bot: In Progress']
            })

      # Add initial reaction to comment with slash command:
      - name: 'Add initial reaction'
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
          script: |
            const commentBody = context.payload.comment.body.trim();
            const RE_COMMANDS = /^\/stdlib\s+(help|check-files|update-copyright-years|lint-autofix|merge|rebase|make-commands)$/i;
            const isRecognizedCommand = RE_COMMANDS.test( commentBody );

            if ( isRecognizedCommand ) {
              await github.rest.reactions.createForIssueComment({
                'owner': context.repo.owner,
                'repo': context.repo.repo,
                'comment_id': context.payload.comment.id,
                'content': 'eyes'
              });
            } else {
              // Include the full user comment as a Markdown quote block in response:
              const lines = commentBody.split( '\n' );
              const quote = lines.map( line => `> ${line}` ).join( '\n' );

              await github.rest.issues.createComment({
                'owner': context.repo.owner,
                'repo': context.repo.repo,
                'issue_number': context.issue.number,
                'body': `${quote}\n\n@${context.payload.comment.user.login}, slash command not recognized. Please use \`/stdlib help\` to view available commands.`
              });
            }

  # Define a job for checking for required files:
  check_files:

    # Define a display name:
    name: 'Check for required files'

    # Ensure initial reaction job has completed before running this job:
    needs: [ add_initial_reaction ]

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib check-files')

    # Run reusable workflow:
    uses: ./.github/workflows/check_required_files.yml
    with:
      pull_request_number: ${{ github.event.issue.number }}
      user: ${{ github.event.comment.user.login }}
    secrets:
      STDLIB_BOT_GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}

  # Define a command for leaving a comment with make command instructions:
  make-commands:
    # Define a display name:
    name: 'Post a comment with make command instructions'

    # Ensure initial reaction job has completed before running this job:
    needs: [ add_initial_reaction ]

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib make-commands')

    # Run reusable workflow:
    uses: ./.github/workflows/pr_commands_comment.yml
    with:
      pull_request_number: ${{ github.event.issue.number }}
    secrets:
      STDLIB_BOT_GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}

  # Define a job for updating copyright header years:
  update_copyright_years:

    # Define a display name:
    name: 'Update copyright header years'

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib update-copyright-years')

    # Run reusable workflow:
    uses: ./.github/workflows/update_pr_copyright_years.yml
    with:
      pull_request_number: ${{ github.event.issue.number }}
    secrets:
      STDLIB_BOT_GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
      STDLIB_BOT_GPG_PRIVATE_KEY: ${{ secrets.STDLIB_BOT_GPG_PRIVATE_KEY }}
      STDLIB_BOT_GPG_PASSPHRASE: ${{ secrets.STDLIB_BOT_GPG_PASSPHRASE }}

  # Define a job for auto-fixing lint errors:
  fix_lint_errors:

    # Define a display name:
    name: 'Auto-fix lint errors'

    # Ensure initial reaction job has completed before running this job:
    needs: [ add_initial_reaction ]

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib lint-autofix')

    # Run reusable workflow:
    uses: ./.github/workflows/lint_autofix.yml
    with:
      pull_request_number: ${{ github.event.issue.number }}
    secrets:
      STDLIB_BOT_GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
      STDLIB_BOT_GPG_PRIVATE_KEY: ${{ secrets.STDLIB_BOT_GPG_PRIVATE_KEY }}
      STDLIB_BOT_GPG_PASSPHRASE: ${{ secrets.STDLIB_BOT_GPG_PASSPHRASE }}

  # Define a job for merging develop branch:
  merge_develop:

    # Define a display name:
    name: 'Merge changes from develop branch into this PR'

    # Ensure initial reaction job has completed before running this job:
    needs: [ add_initial_reaction ]

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib merge')

    # Run reusable workflow:
    uses: ./.github/workflows/pr_merge_develop.yml
    with:
      pull_request_number: ${{ github.event.issue.number }}
    secrets:
      STDLIB_BOT_GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
      STDLIB_BOT_GPG_PRIVATE_KEY: ${{ secrets.STDLIB_BOT_GPG_PRIVATE_KEY }}
      STDLIB_BOT_GPG_PASSPHRASE: ${{ secrets.STDLIB_BOT_GPG_PASSPHRASE }}

  # Define a job for rebasing on develop branch:
  rebase_develop:

    # Define a display name:
    name: 'Rebase this PR on top of develop branch'

    # Ensure initial reaction job has completed before running this job:
    needs: [ add_initial_reaction ]

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib rebase')

    # Run reusable workflow:
    uses: ./.github/workflows/pr_rebase_develop.yml
    with:
      pull_request_number: ${{ github.event.issue.number }}
    secrets:
      STDLIB_BOT_GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
      STDLIB_BOT_GPG_PRIVATE_KEY: ${{ secrets.STDLIB_BOT_GPG_PRIVATE_KEY }}
      STDLIB_BOT_GPG_PASSPHRASE: ${{ secrets.STDLIB_BOT_GPG_PASSPHRASE }}

  # Define a job for printing a list of available slash commands:
  help:

    # Define a display name:
    name: 'Print a list of available slash commands'

    # Define the type of virtual host machine:
    runs-on: ubuntu-latest

    # Ensure initial reaction job has completed before running this job:
    needs: [ add_initial_reaction ]

    # Define the conditions under which the job should run:
    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/stdlib help')

    # Define the job's steps:
    steps:
      # Create a comment on the pull request informing the user of available slash commands:
      - name: 'Create a comment on the pull request informing the user of available slash commands'
        # Pin action to full length commit SHA
        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043 # v4.0.0
        with:
          # Specify the issue or pull request number:
          issue-number: ${{ github.event.issue.number }}

          # Specify the comment body:
          body: |
            @${{ github.event.comment.user.login }}, available slash commands include:

            - `/stdlib check-files` - Check for required files.
            - `/stdlib make-commands` - Print `make` commands for package changed in PR.
            - `/stdlib update-copyright-years` - Update copyright header years.
            - `/stdlib lint-autofix` - Auto-fix lint errors.
            - `/stdlib merge` - Merge changes from develop branch into this PR.
            - `/stdlib rebase` - Rebase this PR on top of develop branch.

          # GitHub token:
          token: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}

  # Define a job for removing the in-progress label:
  remove_progress_label:

    # Define a display name:
    name: 'Remove in-progress label'

    # Define the type of virtual host machine:
    runs-on: ubuntu-latest

    # Ensure all previous jobs have completed before running this job:
    needs: [ add_initial_reaction, check_files, make-commands, update_copyright_years, fix_lint_errors, merge_develop, rebase_develop, help ]

    # Define the conditions under which the job should run:
    if: |
      always() &&
      github.event.issue.pull_request &&
      startsWith(github.event.comment.body, '/stdlib')

    # Define the job's steps:
    steps:
      # Check if any previous job failed and post a comment:
      - name: 'Notify of command failure'
        if: |
          contains(needs.*.result, 'failure')
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
          script: |
            const commentBody = context.payload.comment.body.trim();
            const lines = commentBody.split( '\n' );
            const quote = lines.map( line => `> ${line}` ).join( '\n' );

            await github.rest.issues.createComment({
              'owner': context.repo.owner,
              'repo': context.repo.repo,
              'issue_number': context.issue.number,
              'body': `${quote}\n\n@${context.payload.comment.user.login}, the slash command failed to complete. Please check the workflow logs for details.\n\n[View workflow run](https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId})`
            });

      - name: Remove in-progress label
        # Run the step regardless of the outcome of previous steps:
        if: always()
        # Pin action to full length commit SHA
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
          script: |
            try {
              await github.rest.issues.removeLabel({
                'owner': context.repo.owner,
                'repo': context.repo.repo,
                'issue_number': context.issue.number,
                'name': 'bot: In Progress'
              })
            } catch ( error ) {
              console.log( 'Error removing label: %s', error.message );
            }