#!/usr/bin/env python

# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
# SPDX-License-Identifier: Apache-2.0

import argparse
import inspect
import os
import re
import sys
from io import StringIO
from pathlib import Path
from typing import Dict, List, Optional, Tuple

import yaml
from idf_ci_utils import IDF_PATH, get_pytest_cases, get_ttfw_cases

YES = u'\u2713'
NO = u'\u2717'

# | Supported Target | ... |
# | ---------------- | --- |
SUPPORTED_TARGETS_TABLE_REGEX = re.compile(
    r'^\|\s*Supported Targets.+$\n^\|(?:\s*|-).+$\n?', re.MULTILINE
)

USUAL_TO_FORMAL = {
    'esp32': 'ESP32',
    'esp32s2': 'ESP32-S2',
    'esp32s3': 'ESP32-S3',
    'esp32c3': 'ESP32-C3',
    'esp32h2': 'ESP32-H2',
    'esp32c2': 'ESP32-C2',
    'esp32c6': 'ESP32-C6',
    'linux': 'Linux',
}

FORMAL_TO_USUAL = {
    'ESP32': 'esp32',
    'ESP32-S2': 'esp32s2',
    'ESP32-S3': 'esp32s3',
    'ESP32-C3': 'esp32c3',
    'ESP32-H2': 'esp32h2',
    'ESP32-C2': 'esp32c2',
    'ESP32-C6': 'esp32c6',
    'Linux': 'linux',
}


def doublequote(s: str) -> str:
    if s.startswith('"') and s.endswith('"'):
        return s

    return f'"{s}"'


def check_readme(
    paths: List[str],
    exclude_dirs: Optional[List[str]] = None,
    extra_default_build_targets: Optional[List[str]] = None,
) -> None:
    from idf_build_apps import App, find_apps
    from idf_build_apps.constants import SUPPORTED_TARGETS

    def get_readme_path(_app: App) -> Optional[str]:
        _readme_path = os.path.join(_app.app_dir, 'README.md')

        if not os.path.isfile(_readme_path):
            _readme_path = os.path.join(_app.app_dir, '..', 'README.md')

            if not os.path.isfile(_readme_path):
                _readme_path = None  # type: ignore

        return _readme_path

    def _generate_new_support_table_str(_app: App) -> str:
        # extra space here
        table_headers = [
            f'{USUAL_TO_FORMAL[target]}' for target in _app.supported_targets
        ]
        table_headers = ['Supported Targets'] + table_headers

        res = '| ' + ' | '.join(table_headers) + ' |\n'
        res += '| ' + ' | '.join(['-' * len(item) for item in table_headers]) + ' |'

        return res

    def _parse_existing_support_table_str(_app: App) -> Tuple[Optional[str], List[str]]:
        _readme_path = get_readme_path(_app)
        if not _readme_path:
            return None, SUPPORTED_TARGETS

        with open(_readme_path) as _fr:
            _readme_str = _fr.read()

        support_string = SUPPORTED_TARGETS_TABLE_REGEX.findall(_readme_str)
        if not support_string:
            return None, SUPPORTED_TARGETS

        # old style
        parts = [
            part.strip()
            for part in support_string[0].split('\n', 1)[0].split('|')
            if part.strip()
        ]
        return support_string[0].strip(), [FORMAL_TO_USUAL[part] for part in parts[1:]]

    def check_enable_build(_app: App, _old_supported_targets: List[str]) -> bool:
        if _app.supported_targets == sorted(_old_supported_targets):
            return True

        _readme_path = get_readme_path(_app)
        if_clause = f'IDF_TARGET in [{", ".join([doublequote(target) for target in sorted(_old_supported_targets)])}]'

        print(
            inspect.cleandoc(
                f'''
            {_app.app_dir}:
            - enable build targets according to the manifest file: {_app.supported_targets}
            - enable build targets according to the old Supported Targets table under readme "{_readme_path}": {_old_supported_targets}

            If you want to disable some targets, please use the following snippet:

            # Please combine this with the original one
            #
            # Notes:
            # - please keep in mind to avoid duplicated folders as yaml keys
            # - please use parentheses to group conditions, the "or" and "and" operators could only accept two operands
            {_app.app_dir}:
              enable:
                - if: {if_clause}
                  temporary: true
                  reason: <why only enable build jobs for these targets>

            '''
            )
        )

        return False

    apps = sorted(
        find_apps(
            paths,
            'all',
            recursive=True,
            exclude_list=exclude_dirs or [],
            manifest_files=[
                str(p) for p in Path(IDF_PATH).glob('**/.build-test-rules.yml')
            ],
            default_build_targets=SUPPORTED_TARGETS + extra_default_build_targets,
        )
    )
    exit_code = 0

    checked_app_dirs = set()
    for app in apps:
        if app.app_dir not in checked_app_dirs:
            checked_app_dirs.add(app.app_dir)
        else:
            continue

        replace_str, old_supported_targets = _parse_existing_support_table_str(app)
        success = check_enable_build(app, old_supported_targets)
        if not success:
            print(f'check_enable_build failed for app: {app}')
            print('-' * 80)
            exit_code = 1

        readme_path = get_readme_path(app)
        # no readme, create a new file
        if not readme_path:
            with open(os.path.join(app.app_dir, 'README.md'), 'w') as fw:
                fw.write(_generate_new_support_table_str(app) + '\n')
            print(f'Added new README file: {os.path.join(app.app_dir, "README.md")}')
            print('-' * 80)
            exit_code = 1
        # has old table, but different string
        elif replace_str and replace_str != _generate_new_support_table_str(app):
            with open(readme_path) as fr:
                readme_str = fr.read()

            with open(readme_path, 'w') as fw:
                fw.write(
                    readme_str.replace(
                        replace_str, _generate_new_support_table_str(app)
                    )
                )
                print(f'Modified README file: {readme_path}')
            print('-' * 80)
            exit_code = 1
        # does not have old table
        elif not replace_str:
            with open(readme_path) as fr:
                readme_str = fr.read()

            with open(readme_path, 'w') as fw:
                fw.write(
                    _generate_new_support_table_str(app) + '\n\n' + readme_str
                )  # extra new line

            print(f'Modified README file: {readme_path}')
            print('-' * 80)
            exit_code = 1

    sys.exit(exit_code)


def check_test_scripts(
    paths: List[str],
    exclude_dirs: Optional[List[str]] = None,
    bypass_check_test_targets: Optional[List[str]] = None,
) -> None:
    from idf_build_apps import App, find_apps

    # takes long time, run only in CI
    # dict:
    # {
    #      app_dir: {
    #          'script_path': 'path/to/script',
    #          'targets': ['esp32', 'esp32s2', 'esp32s3', 'esp32c3', 'esp32h2', 'esp32c2', 'linux'],
    #      }
    # }
    def check_enable_test(
        _app: App,
        _pytest_app_dir_targets_dict: Dict[str, Dict[str, str]],
        _ttfw_app_dir_targets_dict: Dict[str, Dict[str, str]],
    ) -> bool:
        if _app.app_dir in _pytest_app_dir_targets_dict:
            test_script_path = _pytest_app_dir_targets_dict[_app.app_dir]['script_path']
            actual_verified_targets = sorted(
                set(_pytest_app_dir_targets_dict[_app.app_dir]['targets'])
            )
        elif _app.app_dir in _ttfw_app_dir_targets_dict:
            test_script_path = _ttfw_app_dir_targets_dict[_app.app_dir]['script_path']
            actual_verified_targets = sorted(
                set(_ttfw_app_dir_targets_dict[_app.app_dir]['targets'])
            )
        else:
            return True  # no test case

        if (
            _app.app_dir in _pytest_app_dir_targets_dict
            and _app.app_dir in _ttfw_app_dir_targets_dict
        ):
            print(
                f'''
            Both pytest and ttfw test cases are found for {_app.app_dir},
            please remove one of them.
            pytest script: {_pytest_app_dir_targets_dict[_app.app_dir]['script_path']}
            ttfw script: {_ttfw_app_dir_targets_dict[_app.app_dir]['script_path']}
            '''
            )
            return False

        actual_extra_tested_targets = set(actual_verified_targets) - set(
            _app.verified_targets
        )
        if actual_extra_tested_targets - set(bypass_check_test_targets or []):
            print(
                inspect.cleandoc(
                    f'''
                {_app.app_dir}:
                - enable test targets according to the manifest file: {_app.verified_targets}
                - enable test targets according to the test scripts: {actual_verified_targets}

                test scripts enabled targets should be a subset of the manifest file declared ones.
                Please check the test script: {test_script_path}.

                '''
                )
            )
            return False

        if actual_verified_targets == _app.verified_targets:
            return True
        elif actual_verified_targets == sorted(_app.verified_targets + bypass_check_test_targets or []):
            print(f'WARNING: bypass test script check on {_app.app_dir} for targets {bypass_check_test_targets} ')
            return True

        if_clause = f'IDF_TARGET in [{", ".join([doublequote(target) for target in sorted(set(_app.verified_targets) - set(actual_verified_targets))])}]'

        print(
            inspect.cleandoc(
                f'''
            {_app.app_dir}:
            - enable test targets according to the manifest file: {_app.verified_targets}
            - enable test targets according to the test scripts: {actual_verified_targets}

            the test scripts enabled test targets should be the same with the manifest file enabled ones. Please check
            the test script manually: {test_script_path}.

            If you want to enable test targets in the pytest test scripts, please add `@pytest.mark.MISSING_TARGET`
            marker above the test case function.

            If you want to enable test targets in the ttfw test scripts, please add/extend the keyword `targets` in
            the ttfw decorator, e.g. `@ttfw_idf.idf_example_test(..., target=['esp32', 'MISSING_TARGET'])`

            If you want to disable the test targets in the manifest file, please modify your manifest file with
            the following code snippet:

            # Please combine this with the original one
            #
            # Notes:
            # - please keep in mind to avoid duplicated folders as yaml keys
            # - please use parentheses to group conditions, the "or" and "and" operators could only accept two operands
            {_app.app_dir}:
              disable_test:
                - if: {if_clause}
                  temporary: true
                  reason: <why you disable this test>

            '''
            )
        )
        return False

    apps = sorted(
        find_apps(
            paths,
            'all',
            recursive=True,
            exclude_list=exclude_dirs or [],
            manifest_files=[
                str(p) for p in Path(IDF_PATH).glob('**/.build-test-rules.yml')
            ],
        )
    )
    exit_code = 0

    pytest_cases = get_pytest_cases(paths)
    ttfw_cases = get_ttfw_cases(paths)

    pytest_app_dir_targets_dict = {}
    ttfw_app_dir_targets_dict = {}
    for case in pytest_cases:
        for pytest_app in case.apps:
            app_dir = os.path.relpath(pytest_app.path, IDF_PATH)
            if app_dir not in pytest_app_dir_targets_dict:
                pytest_app_dir_targets_dict[app_dir] = {
                    'script_path': case.path,
                    'targets': [pytest_app.target],
                }
            else:
                pytest_app_dir_targets_dict[app_dir]['targets'].append(
                    pytest_app.target
                )

    for case in ttfw_cases:
        app_dir = case.case_info['app_dir']
        if app_dir not in ttfw_app_dir_targets_dict:
            ttfw_app_dir_targets_dict[app_dir] = {
                'script_path': case.case_info['script_path'],
                'targets': [case.case_info['target'].lower()],
            }
        else:
            ttfw_app_dir_targets_dict[app_dir]['targets'].append(
                case.case_info['target'].lower()
            )

    checked_app_dirs = set()
    for app in apps:
        if app.app_dir not in checked_app_dirs:
            checked_app_dirs.add(app.app_dir)
        else:
            continue

        success = check_enable_test(
            app, pytest_app_dir_targets_dict, ttfw_app_dir_targets_dict
        )
        if not success:
            print(f'check_enable_test failed for app: {app}')
            print('-' * 80)
            exit_code = 1
            continue

    sys.exit(exit_code)


def sort_yaml(files: List[str]) -> None:
    from ruamel.yaml import YAML, CommentedMap

    yaml = YAML()
    yaml.indent(mapping=2, sequence=4, offset=2)
    yaml.width = 4096  # avoid wrap lines

    exit_code = 0
    for f in files:
        with open(f) as fr:
            file_s = fr.read()
            fr.seek(0)
            file_d: CommentedMap = yaml.load(fr)

        sorted_yaml = CommentedMap(dict(sorted(file_d.items())))
        file_d.copy_attributes(sorted_yaml)

        with StringIO() as s:
            yaml.dump(sorted_yaml, s)

            string = s.getvalue()
            if string != file_s:
                with open(f, 'w') as fw:
                    fw.write(string)
                print(
                    f'Sorted yaml file {f}. Please take a look. sometimes the format is a bit messy'
                )
                exit_code = 1

    sys.exit(exit_code)


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='ESP-IDF apps build/test checker')
    action = parser.add_subparsers(dest='action')

    _check_readme = action.add_parser('check-readmes')
    _check_readme.add_argument('paths', nargs='+', help='check under paths')
    _check_readme.add_argument(
        '-c',
        '--config',
        default=os.path.join(IDF_PATH, '.gitlab', 'ci', 'default-build-test-rules.yml'),
        help='default build test rules config file',
    )

    _check_test_scripts = action.add_parser('check-test-scripts')
    _check_test_scripts.add_argument('paths', nargs='+', help='check under paths')
    _check_test_scripts.add_argument(
        '-c',
        '--config',
        default=os.path.join(IDF_PATH, '.gitlab', 'ci', 'default-build-test-rules.yml'),
        help='default build test rules config file',
    )

    _sort_yaml = action.add_parser('sort-yaml')
    _sort_yaml.add_argument('files', nargs='+', help='all specified yaml files')

    arg = parser.parse_args()

    # Since this script is executed from the pre-commit hook environment, make sure IDF_PATH is set
    os.environ['IDF_PATH'] = os.path.realpath(
        os.path.join(os.path.dirname(__file__), '..', '..')
    )

    if arg.action == 'sort-yaml':
        sort_yaml(arg.files)
    else:
        check_dirs = set()

        # check if *_caps.h files changed
        check_all = False
        soc_caps_header_files = list(
            (Path(IDF_PATH) / 'components' / 'soc').glob('**/*_caps.h')
        )
        for p in arg.paths:
            if Path(p).resolve() in soc_caps_header_files:
                check_all = True
                break

            if os.path.isfile(p):
                check_dirs.add(os.path.dirname(p))
            else:
                check_dirs.add(p)

        if check_all:
            check_dirs = {IDF_PATH}
            _exclude_dirs = [os.path.join(IDF_PATH, 'tools', 'unit-test-app'),
                             os.path.join(IDF_PATH, 'tools', 'test_build_system', 'build_test_app')]
        else:
            _exclude_dirs = []

        extra_default_build_targets: List[str] = []
        bypass_check_test_targets: List[str] = []
        if arg.config:
            with open(arg.config) as fr:
                configs = yaml.safe_load(fr)

            if configs:
                extra_default_build_targets = (
                    configs.get('extra_default_build_targets') or []
                )
                bypass_check_test_targets = (
                    configs.get('bypass_check_test_targets') or []
                )

        if arg.action == 'check-readmes':
            check_readme(
                list(check_dirs),
                exclude_dirs=_exclude_dirs,
                extra_default_build_targets=extra_default_build_targets,
            )
        elif arg.action == 'check-test-scripts':
            check_test_scripts(
                list(check_dirs),
                exclude_dirs=_exclude_dirs,
                bypass_check_test_targets=bypass_check_test_targets,
            )