# ==================================================================================================================== #
# Authors:                                                                                                             #
#   Patrick Lehmann                                                                                                    #
#   Unai Martinez-Corral                                                                                               #
#                                                                                                                      #
# ==================================================================================================================== #
# Copyright 2020-2022 The pyTooling 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.                                                                                       #
#                                                                                                                      #
# SPDX-License-Identifier: Apache-2.0                                                                                  #
# ==================================================================================================================== #
name: Coverage Collection

on:
  workflow_call:
    inputs:
      python_version:
        description: 'Python version.'
        required: false
        default: '3.10'
        type: string
      requirements:
        description: 'Python dependencies to be installed through pip.'
        required: false
        default: '-r tests/requirements.txt'
        type: string
      unittest_directory:
        description: 'Path to the directory containing unit tests.'
        required: false
        default: 'tests/unit'
        type: string
      coverage_config:
        description: 'Path to the .coveragerc file. Use pyproject.toml by default.'
        required: false
        default: 'pyproject.toml'
        type: string
      artifact:
        description: 'Name of the coverage artifact.'
        required: true
        type: string
    secrets:
      codacy_token:
        description: 'Token to push result to codacy.'
        required: true

jobs:

  Coverage:
    name: 📈 Collect Coverage Data using Python ${{ inputs.python_version }}
    runs-on: ubuntu-latest

    steps:
      - name: ⏬ Checkout repository
        uses: actions/checkout@v3

      - name: 🐍 Setup Python ${{ inputs.python_version }}
        uses: actions/setup-python@v4
        with:
          python-version: ${{ inputs.python_version }}

      - name: 🗂 Install dependencies
        run: |
          python -m pip install -U pip
          python -m pip install tomli
          python -m pip install ${{ inputs.requirements }}

      - name: 🔁 Extract configurations from pyproject.toml
        id: getVariables
        shell: python
        run: |
          from os import environ
          from pathlib import Path
          from tomli   import load as tomli_load

          htmlDirectory = 'htmlcov'
          xmlFile = './coverage.xml'
          coverageRC = "${{ inputs.coverage_config }}".strip()

          # Read output paths from 'pyproject.toml' file
          if coverageRC == "pyproject.toml":
              pyProjectFile =  Path("pyproject.toml")
              if pyProjectFile.exists():
                  with pyProjectFile.open("rb") as file:
                      pyProjectSettings = tomli_load(file)

                  htmlDirectory = pyProjectSettings["tool"]["coverage"]["html"]["directory"]
                  xmlFile       = pyProjectSettings["tool"]["coverage"]["xml"]["output"]
              else:
                  print(f"File '{pyProjectFile}' not found and no ' .coveragerc' file specified.")

          # Read output paths from '.coveragerc' file
          elif len(coverageRC) > 0:
              coverageRCFile = Path(coverageRC)
              if coverageRCFile.exists():
                  with coverageRCFile.open("rb") as file:
                      coverageRCSettings = tomli_load(file)

                  htmlDirectory = coverageRCSettings["html"]["directory"]
                  xmlFile       = coverageRCSettings["xml"]["output"]
              else:
                  print(f"File '{coverageRCFile}' not found.")

          with open(environ['GITHUB_OUTPUT'], 'a', encoding='utf-8') as gho:
              gho.write(f"""\
          coverage_report_html_directory={htmlDirectory}
          coverage_report_xml={xmlFile}
          """)
          print(f"DEBUG:\n  html={htmlDirectory}\n  xml={xmlFile}")

      - name: Collect coverage
        continue-on-error: true
        run: |
          [ 'x${{ inputs.coverage_config }}' != 'x' ] && PYCOV_ARGS='--cov-config=${{ inputs.coverage_config }}' || unset PYCOV_ARGS
          python -m pytest -rA --cov=. $PYCOV_ARGS ${{ inputs.unittest_directory }} --color=yes

      - name: Convert to cobertura format
        run: coverage xml

      - name: Convert to HTML format
        run: |
          coverage html -d ${{ steps.getVariables.outputs.coverage_report_html_directory }}
          rm ${{ steps.getVariables.outputs.coverage_report_html_directory }}/.gitignore

      - name: 📤 Upload 'Coverage Report' artifact
        continue-on-error: true
        uses: actions/upload-artifact@v3
        with:
          name: ${{ inputs.artifact }}
          path: ${{ steps.getVariables.outputs.coverage_report_html_directory }}
          if-no-files-found: error
          retention-days: 1

      - name: 📊 Publish coverage at CodeCov
        continue-on-error: true
        uses: codecov/codecov-action@v1
        with:
          file: ${{ steps.getVariables.outputs.coverage_report_xml }}
          flags: unittests
          env_vars: PYTHON

      - name: 📉 Publish coverage at Codacy
        continue-on-error: true
        uses: codacy/codacy-coverage-reporter-action@master
        with:
          project-token: ${{ secrets.codacy_token }}
          coverage-reports: ${{ steps.getVariables.outputs.coverage_report_xml }}