"""
Logic for uploading to s3 based on supplied template file and s3 bucket
"""

# Copyright 2012-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.
import json
import logging
import os
from typing import List, Optional

import boto3
import click
import docker

from samcli.commands.package.exceptions import PackageFailedError
from samcli.lib.intrinsic_resolver.intrinsics_symbol_table import IntrinsicsSymbolTable
from samcli.lib.package.artifact_exporter import Template
from samcli.lib.package.code_signer import CodeSigner
from samcli.lib.package.ecr_uploader import ECRUploader
from samcli.lib.package.s3_uploader import S3Uploader
from samcli.lib.package.uploaders import Uploaders
from samcli.lib.providers.provider import ResourceIdentifier, Stack, get_resource_full_path_by_id
from samcli.lib.providers.sam_stack_provider import SamLocalStackProvider
from samcli.lib.utils.boto_utils import get_boto_config_with_user_agent
from samcli.lib.utils.preview_runtimes import PREVIEW_RUNTIMES
from samcli.lib.utils.resources import AWS_LAMBDA_FUNCTION, AWS_SERVERLESS_FUNCTION
from samcli.yamlhelper import yaml_dump

LOG = logging.getLogger(__name__)


class PackageContext:
    MSG_PACKAGED_TEMPLATE_WRITTEN = (
        "\nSuccessfully packaged artifacts and wrote output template "
        "to file {output_file_name}."
        "\n"
        "Execute the following command to deploy the packaged template"
        "\n"
        "sam deploy --template-file {output_file_path} "
        "--stack-name <YOUR STACK NAME>"
        "\n"
    )

    uploaders: Uploaders

    def __init__(
        self,
        template_file,
        s3_bucket,
        image_repository,
        image_repositories,
        s3_prefix,
        kms_key_id,
        output_template_file,
        use_json,
        force_upload,
        no_progressbar,
        metadata,
        region,
        profile,
        on_deploy=False,
        signing_profiles=None,
    ):
        self.template_file = template_file
        self.s3_bucket = s3_bucket
        self.image_repository = image_repository
        self.image_repositories = image_repositories
        self.s3_prefix = s3_prefix
        self.kms_key_id = kms_key_id
        self.output_template_file = output_template_file
        self.use_json = use_json
        self.force_upload = force_upload
        self.no_progressbar = no_progressbar
        self.metadata = metadata
        self.region = region
        self.profile = profile
        self.on_deploy = on_deploy
        self.code_signer = None
        self.signing_profiles = signing_profiles
        self._global_parameter_overrides = {IntrinsicsSymbolTable.AWS_REGION: region} if region else {}

    def __enter__(self):
        return self

    def __exit__(self, *args):
        pass

    def run(self):
        """
        Execute packaging based on the argument provided by customers and samconfig.toml.
        """
        stacks, _ = SamLocalStackProvider.get_stacks(
            self.template_file,
            global_parameter_overrides=self._global_parameter_overrides,
        )
        self._warn_preview_runtime(stacks)
        self.image_repositories = self.image_repositories if self.image_repositories is not None else {}
        updated_repo = {}
        for image_repo_func_id, image_repo_uri in self.image_repositories.items():
            repo_full_path = get_resource_full_path_by_id(stacks, ResourceIdentifier(image_repo_func_id))
            if repo_full_path:
                updated_repo[repo_full_path] = image_repo_uri
        self.image_repositories = updated_repo
        region_name = self.region if self.region else None

        s3_client = boto3.client(
            "s3",
            config=get_boto_config_with_user_agent(signature_version="s3v4", region_name=region_name),
        )
        ecr_client = boto3.client("ecr", config=get_boto_config_with_user_agent(region_name=region_name))

        docker_client = docker.from_env()

        s3_uploader = S3Uploader(
            s3_client, self.s3_bucket, self.s3_prefix, self.kms_key_id, self.force_upload, self.no_progressbar
        )
        # attach the given metadata to the artifacts to be uploaded
        s3_uploader.artifact_metadata = self.metadata
        ecr_uploader = ECRUploader(
            docker_client, ecr_client, self.image_repository, self.image_repositories, self.no_progressbar
        )

        self.uploaders = Uploaders(s3_uploader, ecr_uploader)

        code_signer_client = boto3.client("signer", config=get_boto_config_with_user_agent(region_name=region_name))
        self.code_signer = CodeSigner(code_signer_client, self.signing_profiles)

        try:
            exported_str = self._export(self.template_file, self.use_json)

            self.write_output(self.output_template_file, exported_str)

            if self.output_template_file and not self.on_deploy:
                msg = self.MSG_PACKAGED_TEMPLATE_WRITTEN.format(
                    output_file_name=self.output_template_file,
                    output_file_path=os.path.abspath(self.output_template_file),
                )
                click.echo(msg)
        except OSError as ex:
            raise PackageFailedError(template_file=self.template_file, ex=str(ex)) from ex

    def _export(self, template_path, use_json):
        template = Template(
            template_path,
            os.getcwd(),
            self.uploaders,
            self.code_signer,
            normalize_template=True,
            normalize_parameters=True,
        )
        exported_template = template.export()

        if use_json:
            exported_str = json.dumps(exported_template, indent=4, ensure_ascii=False)
        else:
            exported_str = yaml_dump(exported_template)

        return exported_str

    @staticmethod
    def _warn_preview_runtime(stacks: List[Stack]) -> None:
        for stack in stacks:
            for _, resource_dict in stack.resources.items():
                if resource_dict.get("Type") not in [AWS_SERVERLESS_FUNCTION, AWS_LAMBDA_FUNCTION]:
                    continue
                if resource_dict.get("Properties", {}).get("Runtime", "") in PREVIEW_RUNTIMES:
                    click.secho(
                        "Warning: This stack contains one or more Lambda functions using a runtime which is not "
                        "yet generally available. This runtime should not be used for production applications. "
                        "For more information on supported runtimes, see "
                        "https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html.",
                        fg="yellow",
                    )
                return

    @staticmethod
    def write_output(output_file_name: Optional[str], data: str) -> None:
        if output_file_name is None:
            click.echo(data)
            return

        with open(output_file_name, "w") as fp:
            fp.write(data)
