import dbt.utils
import dbt.deprecations
import dbt.exceptions

from dbt.config import UnsetProfileConfig
from dbt.config.renderer import DbtProjectYamlRenderer
from dbt.context.target import generate_target_context
from dbt.deps.base import downloads_directory
from dbt.deps.resolver import resolve_packages

from dbt.logger import GLOBAL_LOGGER as logger
from dbt.clients import system

from dbt.task.base import BaseTask


class DepsTask(BaseTask):
    ConfigType = UnsetProfileConfig

    def __init__(self, args, config: UnsetProfileConfig):
        super().__init__(args=args, config=config)

    def track_package_install(
        self, package_name: str, source_type: str, version: str
    ) -> None:
        # Hub packages do not need to be hashed, as they are public
        # Use the string 'local' for local package versions
        if source_type == 'local':
            version = 'local'
        elif source_type != 'hub':
            package_name = dbt.utils.md5(package_name)
            version = dbt.utils.md5(version)

        dbt.tracking.track_package_install(
            self.config,
            self.config.args,
            {
                "name": package_name,
                "source": source_type,
                "version": version
            }
        )

    def run(self):
        system.make_directory(self.config.modules_path)
        packages = self.config.packages.packages
        if not packages:
            logger.info('Warning: No packages were found in packages.yml')
            return

        with downloads_directory():
            final_deps = resolve_packages(packages, self.config)

            renderer = DbtProjectYamlRenderer(generate_target_context(
                self.config, self.config.cli_vars
            ))

            for package in final_deps:
                logger.info('Installing {}', package)
                package.install(self.config, renderer)
                logger.info('  Installed from {}\n',
                            package.nice_version_name())

                self.track_package_install(
                    package_name=package.name,
                    source_type=package.source_type(),
                    version=package.get_version())