import json
import os
import subprocess
import textwrap

from cpl_cli.configuration.venv_helper_service import VenvHelper
from cpl_core.configuration.configuration_abc import ConfigurationABC
from cpl_core.console.console import Console
from cpl_core.console.foreground_color_enum import ForegroundColorEnum
from cpl_core.environment.application_environment_abc import ApplicationEnvironmentABC
from cpl_core.utils.pip import Pip
from cpl_cli.cli_settings import CLISettings
from cpl_cli.command_abc import CommandABC
from cpl_cli.configuration import BuildSettings
from cpl_cli.configuration.project_settings import ProjectSettings
from cpl_cli.configuration.settings_helper import SettingsHelper


class UpdateService(CommandABC):

    def __init__(self,
                 config: ConfigurationABC,
                 env: ApplicationEnvironmentABC,
                 build_settings: BuildSettings,
                 project_settings: ProjectSettings,
                 cli_settings: CLISettings):
        """
        Service for the CLI command update
        :param config:
        :param env:
        :param build_settings:
        :param project_settings:
        :param cli_settings:
        """
        CommandABC.__init__(self)

        self._config = config
        self._env = env
        self._build_settings = build_settings
        self._project_settings = project_settings
        self._cli_settings = cli_settings
        self._is_simulation = False

        self._project_file = f'{self._project_settings.name}.json'

    @property
    def help_message(self) -> str:
        return textwrap.dedent("""\
        Updates the CPL and project dependencies.
        Usage: cpl update
        """)

    def _collect_project_dependencies(self) -> list[tuple]:
        """
        Collects project dependencies
        :return:
        """
        dependencies = []
        for package in self._project_settings.dependencies:
            name = package
            if '==' in package:
                name = package.split('==')[0]

            dependencies.append((package, name))

        return dependencies

    def _update_project_dependencies(self, dependencies):
        """
        Updates project dependencies
        :return:
        """
        for package, name in dependencies:
            Pip.install(
                name,
                '--upgrade',
                '--upgrade-strategy',
                'eager',
                source=self._cli_settings.pip_path if 'cpl-' in name else None,
                stdout=subprocess.DEVNULL,
                stderr=subprocess.DEVNULL
            )

            new_package = Pip.get_package(name)
            if new_package is None:
                Console.error(f'Update for package {package} failed')
                continue

            self._project_json_update_dependency(package, new_package)

    def _check_project_dependencies(self):
        """
        Checks project dependencies for updates
        :return:
        """
        dependencies = Console.spinner(
            'Collecting installed dependencies', self._collect_project_dependencies,
            text_foreground_color=ForegroundColorEnum.green,
            spinner_foreground_color=ForegroundColorEnum.cyan
        )

        Console.spinner(
            'Updating installed dependencies', self._update_project_dependencies, dependencies,
            text_foreground_color=ForegroundColorEnum.green,
            spinner_foreground_color=ForegroundColorEnum.cyan
        )

        Console.write_line(f'Found {len(self._project_settings.dependencies)} dependencies.')

    @staticmethod
    def _check_outdated():
        """
        Checks for outdated packages in project
        :return:
        """
        table_str: bytes = Console.spinner(
            'Analyzing for available package updates', Pip.get_outdated,
            text_foreground_color=ForegroundColorEnum.green,
            spinner_foreground_color=ForegroundColorEnum.cyan
        )

        table = str(table_str, 'utf-8').split('\n')
        if len(table) > 1 and table[0] != '':
            Console.write_line('\tAvailable updates for packages:')
            for row in table:
                Console.write_line(f'\t{row}')

            Console.set_foreground_color(ForegroundColorEnum.yellow)
            Console.write_line(f'\tUpdate with {Pip.get_executable()} -m pip install --upgrade <package>')
            Console.set_foreground_color(ForegroundColorEnum.default)

    def _project_json_update_dependency(self, old_package: str, new_package: str):
        """
        Writes new package version to project.json
        :param old_package:
        :param new_package:
        :return:
        """
        if self._is_simulation:
            return

        if old_package in self._project_settings.dependencies:
            index = self._project_settings.dependencies.index(old_package)
            if '/' in new_package:
                new_package = new_package.split('/')[0]

            if '\r' in new_package:
                new_package = new_package.replace('\r', '')

            self._project_settings.dependencies[index] = new_package

        config = {
            ProjectSettings.__name__: SettingsHelper.get_project_settings_dict(self._project_settings),
            BuildSettings.__name__: SettingsHelper.get_build_settings_dict(self._build_settings)
        }

        with open(os.path.join(self._env.working_directory, self._project_file), 'w') as project:
            project.write(json.dumps(config, indent=2))
            project.close()

    def execute(self, args: list[str]):
        """
        Entry point of command
        :param args:
        :return:
        """
        if 'simulate' in args:
            args.remove('simulate')
            Console.write_line('Running in simulation mode:')
            self._is_simulation = True

        VenvHelper.init_venv(False, self._env, self._project_settings)

        self._check_project_dependencies()
        self._check_outdated()
        Pip.reset_executable()