# Copyright 2019 The Kubeflow Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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 click
import json
from typing import List, Optional

import kfp_server_api
from kfp.deprecated.cli.output import print_output, OutputFormat


@click.group()
def pipeline():
    """Manage pipeline resources."""
    pass


@pipeline.command()
@click.option("-p", "--pipeline-name", help="Name of the pipeline.")
@click.option("-d", "--description", help="Description for the pipeline.")
@click.argument("package-file")
@click.pass_context
def upload(ctx: click.Context,
           pipeline_name: str,
           package_file: str,
           description: str = None):
    """Upload a KFP pipeline."""
    client = ctx.obj["client"]
    output_format = ctx.obj["output"]
    if not pipeline_name:
        pipeline_name = package_file.split(".")[0]

    pipeline = client.upload_pipeline(package_file, pipeline_name, description)
    _display_pipeline(pipeline, output_format)


@pipeline.command()
@click.option("-p", "--pipeline-id", help="ID of the pipeline", required=False)
@click.option("-n", "--pipeline-name", help="Name of pipeline", required=False)
@click.option(
    "-v",
    "--pipeline-version",
    help="Name of the pipeline version",
    required=True)
@click.argument("package-file")
@click.pass_context
def upload_version(ctx: click.Context,
                   package_file: str,
                   pipeline_version: str,
                   pipeline_id: Optional[str] = None,
                   pipeline_name: Optional[str] = None):
    """Upload a version of the KFP pipeline."""
    client = ctx.obj["client"]
    output_format = ctx.obj["output"]
    if bool(pipeline_id) == bool(pipeline_name):
        raise ValueError("Need to supply 'pipeline-name' or 'pipeline-id'")
    if pipeline_name is not None:
        pipeline_id = client.get_pipeline_id(name=pipeline_name)
        if pipeline_id is None:
            raise ValueError("Can't find a pipeline with name: %s" %
                             pipeline_name)
    version = client.pipeline_uploads.upload_pipeline_version(
        package_file, name=pipeline_version, pipelineid=pipeline_id)
    _display_pipeline_version(version, output_format)


@pipeline.command()
@click.option(
    '--page-token', default='', help="Token for starting of the page.")
@click.option(
    '-m', '--max-size', default=100, help="Max size of the listed pipelines.")
@click.option(
    '--sort-by',
    default="created_at desc",
    help="Can be '[field_name]', '[field_name] desc'. For example, 'name desc'."
)
@click.option(
    '--filter',
    help=(
        "filter: A url-encoded, JSON-serialized Filter protocol buffer "
        "(see [filter.proto](https://github.com/kubeflow/pipelines/blob/master/backend/api/filter.proto))."
    ))
@click.pass_context
def list(ctx: click.Context, page_token: str, max_size: int, sort_by: str,
         filter: str):
    """List uploaded KFP pipelines."""
    client = ctx.obj["client"]
    output_format = ctx.obj["output"]

    response = client.list_pipelines(
        page_token=page_token,
        page_size=max_size,
        sort_by=sort_by,
        filter=filter)
    if response.pipelines:
        _print_pipelines(response.pipelines, output_format)
    else:
        if output_format == OutputFormat.json.name:
            msg = json.dumps([])
        else:
            msg = "No pipelines found"
        click.echo(msg)


@pipeline.command()
@click.argument("pipeline-id")
@click.option(
    '--page-token', default='', help="Token for starting of the page.")
@click.option(
    '-m',
    '--max-size',
    default=100,
    help="Max size of the listed pipeline versions.")
@click.option(
    '--sort-by',
    default="created_at desc",
    help="Can be '[field_name]', '[field_name] desc'. For example, 'name desc'."
)
@click.option(
    '--filter',
    help=(
        "filter: A url-encoded, JSON-serialized Filter protocol buffer "
        "(see [filter.proto](https://github.com/kubeflow/pipelines/blob/master/backend/api/filter.proto))."
    ))
@click.pass_context
def list_versions(ctx: click.Context, pipeline_id: str, page_token: str,
                  max_size: int, sort_by: str, filter: str):
    """List versions of an uploaded KFP pipeline."""
    client = ctx.obj["client"]
    output_format = ctx.obj["output"]

    response = client.list_pipeline_versions(
        pipeline_id,
        page_token=page_token,
        page_size=max_size,
        sort_by=sort_by,
        filter=filter)
    if response.versions:
        _print_pipeline_versions(response.versions, output_format)
    else:
        if output_format == OutputFormat.json.name:
            msg = json.dumps([])
        else:
            msg = "No pipeline or version found"
        click.echo(msg)


@pipeline.command()
@click.argument("version-id")
@click.pass_context
def delete_version(ctx: click.Context, version_id: str):
    """Delete pipeline version.

    Args:
      version_id: id of the pipeline version.

    Returns:
      Object. If the method is called asynchronously, returns the request thread.

    Throws:
      Exception if pipeline version is not found.
    """
    client = ctx.obj["client"]
    return client.delete_pipeline_version(version_id)


@pipeline.command()
@click.argument("pipeline-id")
@click.pass_context
def get(ctx: click.Context, pipeline_id: str):
    """Get detailed information about an uploaded KFP pipeline."""
    client = ctx.obj["client"]
    output_format = ctx.obj["output"]

    pipeline = client.get_pipeline(pipeline_id)
    _display_pipeline(pipeline, output_format)


@pipeline.command()
@click.argument("pipeline-id")
@click.pass_context
def delete(ctx: click.Context, pipeline_id: str):
    """Delete an uploaded KFP pipeline."""
    client = ctx.obj["client"]

    client.delete_pipeline(pipeline_id)
    click.echo(f"{pipeline_id} is deleted")


def _print_pipelines(pipelines: List[kfp_server_api.ApiPipeline],
                     output_format: OutputFormat):
    headers = ["Pipeline ID", "Name", "Uploaded at"]
    data = [[pipeline.id, pipeline.name,
             pipeline.created_at.isoformat()] for pipeline in pipelines]
    print_output(data, headers, output_format, table_format="grid")


def _print_pipeline_versions(versions: List[kfp_server_api.ApiPipelineVersion],
                             output_format: OutputFormat):
    headers = ["Version ID", "Version name", "Uploaded at", "Pipeline ID"]
    data = [[
        version.id, version.name,
        version.created_at.isoformat(),
        next(rr
             for rr in version.resource_references
             if rr.key.type == kfp_server_api.ApiResourceType.PIPELINE).key.id
    ]
            for version in versions]
    print_output(data, headers, output_format, table_format="grid")


def _display_pipeline(pipeline: kfp_server_api.ApiPipeline,
                      output_format: OutputFormat):
    # Pipeline information
    table = [["Pipeline ID", pipeline.id], ["Name", pipeline.name],
             ["Description", pipeline.description],
             ["Uploaded at", pipeline.created_at.isoformat()],
             ["Version ID", pipeline.default_version.id]]

    # Pipeline parameter details
    headers = ["Parameter Name", "Default Value"]
    data = []
    if pipeline.parameters is not None:
        data = [[param.name, param.value] for param in pipeline.parameters]

    if output_format == OutputFormat.table.name:
        print_output([], ["Pipeline Details"], output_format)
        print_output(table, [], output_format, table_format="plain")
        print_output(data, headers, output_format, table_format="grid")
    elif output_format == OutputFormat.json.name:
        output = dict()
        output["Pipeline Details"] = dict(table)
        params = []
        for item in data:
            params.append(dict(zip(headers, item)))
        output["Pipeline Parameters"] = params
        print_output(output, [], output_format)


def _display_pipeline_version(version: kfp_server_api.ApiPipelineVersion,
                              output_format: OutputFormat):
    pipeline_id = next(
        rr for rr in version.resource_references
        if rr.key.type == kfp_server_api.ApiResourceType.PIPELINE).key.id
    table = [["Pipeline ID", pipeline_id], ["Version name", version.name],
             ["Uploaded at", version.created_at.isoformat()],
             ["Version ID", version.id]]

    if output_format == OutputFormat.table.name:
        print_output([], ["Pipeline Version Details"], output_format)
        print_output(table, [], output_format, table_format="plain")
    elif output_format == OutputFormat.json.name:
        print_output(dict(table), [], output_format)
