# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

from __future__ import print_function
import argparse
import yaml
import os

class WardenConfiguration():
    REPOSITORY_SETS = {
        # 0 = groupId
        'java': { 
            'TestUrl': 'https://oss.sonatype.org/content/repositories/releases/[0]/{package_id}/{package_version}/{package_id}-{package_version}.pom',
            'TestUrlTransformationFunction': lambda input_string: input_string.replace('.','/'),
            'URL': 'https://search.maven.org/artifact/[0]/{package_id}',
            'UrlTransformationFunction': lambda input_string: input_string,
            'Text': 'Maven',
        },
        'python': { 
            'URL': 'https://pypi.org/project/{package_id}',
            'Text': 'PyPI'
        },
        'js': { 
            'URL': 'https://www.npmjs.com/package/{package_id}',
            'Text': 'NPM'
        },
        'net': { 
            'URL': 'https://www.nuget.org/packages/{package_id}/',
            'Text': '![{package_id}](https://img.shields.io/nuget/vpre/{package_id}.svg)'
        }
    }

    def __init__(self):
        parser = argparse.ArgumentParser(description ='''\
        Scan an azure-sdk repo and ensure that readmes are present and have appropriate content. 
        This check is done by convention, which is why there is the --scan-language option exists. 
        For normal/CI usage, a .docsettings file should be present in the repository root, to allow
        for visible configuration of all the options.
        ''')

        parser.add_argument(
            '-d',
            '--scan-directory',
            dest = 'scan_directory',
            help = 'The directory on a repo that this tool should be scanning.',
            required = True)
        parser.add_argument(
            '-u',
            '--repo-root',
            dest = 'repo_root',
            help = 'The root of the repo',
            required = False)
        parser.add_argument(
            '-c',
            '--config-location',
            dest = 'config_location',
            required = False,
            help = '''
                  If provided, will replace the repo native .docsettings file 
                  with a .docsettings file found at the location provided by this input.
                  ''')
        parser.add_argument(
            '-p',
            '--package-output',
            dest = 'package_output_location',
            required = False,
            help = '''
                  If provided, will replace the root packages.md file output location 
                  with the location provided by this input.
                  ''')
        parser.add_argument(
            '-l',
            '--scan-language',
            dest = 'scan_language',
            required = False,
            help = 'The language contained within the target directory. Overrides .docsettings contents.')
        parser.add_argument(
            '-r',
            '--root-check-enabled',
            dest = 'root_check_enabled',
            required = False,
            help = 'Enable or disable checking for a readme at the root of the repository. Defaults true. Overrides .docsettings contents.')
        parser.add_argument(
            '-s',
            '--pipeline-stage',
            choices=['release', 'pr', 'ci'],
            dest = 'pipeline_stage',
            required = False,
            help = 'Specify the stage of the pipeline. Used to provide conditional functionality depending on the stage of the pipeline')
        parser.add_argument(
            '-t',
            '--target',
            choices=['all','readme','changelog'],
            dest = 'target',
            required = False,
            help = 'The file name to scan for; "`readme` or `changelog`" or specify `all` to scan for both. Will default to `readme`')
        parser.add_argument(
            '-o',
            '--verbose-output',
            action="store_true",
            dest = 'verbose_output',
            required = False,
            help = 'Enable or disable verbose output. Defaults false. Overrides .docsettings contents.')
        parser.add_argument(
            'command',
            help = ('The warden command to run.'))

        args = parser.parse_args()

        self.command = args.command
        self.target_directory = args.scan_directory
        self.repo_root = args.repo_root or self.target_directory
        self.yml_location = args.config_location or os.path.join(self.repo_root, '.docsettings.yml')
        self.package_index_output_location = args.package_output_location or os.path.join(self.repo_root, 'packages.md')
        self.target = args.target or 'default'
        self.target_files = []

        with open(self.yml_location, 'r') as f:
            try:
                doc = yaml.safe_load(f)
            except err:
                print('Unable to parse .docsettings. Check the location of the file.')

        try:
            self.omitted_paths = doc['omitted_paths'] or []
        except:
            self.omitted_paths = []

        try:
            self.package_indexing_exclusion_list = doc['package_indexing_exclusion_list'] or []
        except:
            self.package_indexing_exclusion_list = []

        try:
            self.package_indexing_traversal_stops = doc['package_indexing_traversal_stops'] or []
        except: 
            self.package_indexing_traversal_stops = []

        try:
            self.required_readme_sections = doc['required_readme_sections'] or []
        except:
            self.required_readme_sections = []

        self.pipeline_stage = args.pipeline_stage or ''

        try:
            self.known_content_issues = doc['known_content_issues'] or []
        except:
            self.known_content_issues = []

        try:
            self.known_presence_issues = doc['known_presence_issues'] or []
        except:
            self.known_presence_issues = []

        try:
            self.scan_language = args.scan_language or doc['language']
        except:
            print('.docsettings has no selected language, neither has the --scan-language parameter been populated. Exiting.')
            exit(1)

        if self.target == 'changelog':
            self.target_files = ['history.rst', 'history.md'] if self.scan_language == 'python' else ['changelog.md']
        elif self.target == 'readme':
            self.target_files = ['readme.rst', 'readme.md'] if self.scan_language == 'python' else ['readme.md']

        try:
            settings_file_root_check = doc['root_check_enabled']
        except:
            settings_file_root_check = False
        self.root_check_enabled = args.root_check_enabled or settings_file_root_check or True

        try:
            settings_file_verbose_output = doc['verbose_output']
        except:
            settings_file_verbose_output = False
        self.verbose_output = args.verbose_output or settings_file_verbose_output or False

    # strips the directory up till the repo root. Allows us to easily think about 
    # relative paths instead of absolute on disk
    def get_output_path(self, input_path):
        return input_path.replace(os.path.normpath(self.repo_root), '')

    def get_known_presence_issues(self):
        known_issue_paths = []
        for exception_tuple in self.known_presence_issues:
            if any(exception_tuple[0].lower().endswith(target_file) for target_file in self.target_files):
                known_issue_paths.append(os.path.normpath(os.path.join(self.repo_root, os.path.dirname(exception_tuple[0]))))
            elif any(target_file.startswith('readme') for target_file in self.target_files):
                known_issue_paths.append(os.path.normpath(os.path.join(self.repo_root, exception_tuple[0])))
        return known_issue_paths

    def get_known_content_issues(self):
        known_issue_paths = []
        for exception_tuple in self.known_content_issues:
            if any(exception_tuple[0].lower().endswith(target_file) for target_file in self.target_files):
                known_issue_paths.append(os.path.normpath(os.path.join(self.repo_root, exception_tuple[0])))
        return known_issue_paths

    def get_package_indexing_traversal_stops(self):
        return [os.path.normpath(os.path.join(self.repo_root, traversal_stop)) for traversal_stop in self.package_indexing_traversal_stops]

    def get_repository_details(self):
        return WardenConfiguration.REPOSITORY_SETS[self.scan_language]

    def dump(self):
        current_config = {
            'command': self.command,
            'target_directory': self.target_directory,
            'repo_root': self.repo_root,
            'yml_location': self.yml_location,
            'omitted_paths': self.omitted_paths,
            'package_indexing_exclusion_list': self.package_indexing_exclusion_list,
            'package_indexing_traversal_stops': self.package_indexing_traversal_stops,
            'scan_language': self.scan_language,
            'root_check_enabled': self.root_check_enabled,
            'verbose_output': self.verbose_output,
            'target_files' : self.target_files,
            'required_readme_sections': self.required_readme_sections,
            'known_content_issues': self.known_content_issues,
            'known_presence_issues': self.known_presence_issues
        }

        print("Warden configuration this run:")
        for key in current_config:
            print('{0}: {1}'.format(key, current_config[key]))

        return current_config