#!/usr/bin/env python3
#
# Copyright 2021 The Bazel Authors. 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.
# 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.
# pylint: disable=invalid-name
# pylint: disable=line-too-long
# pylint: disable=missing-function-docstring
"""An interactive script to add modules into a Bazel registry.

What this script can do:
  - Initialize the Bazel Registry.
  - Generate/update the metadata.json for a module.
  - Add specified MODULE.bazel
  - Generate MODULE.bazel file with given module information
    - module name
    - version
    - compatibility level
    - dependencies
  - Generate the source.json file with given source information
    - The archive url
    - patch files
  - Add specified BUILD file for non-Bazel project by turning it into a patch.
  - Add specified presubmit.yml file.
  - Generate presubmit.yml file by given build & test targets.

"""

import argparse
import os
import sys
import time

from registry import Module
from registry import RegistryClient
from registry import log

import bcr_validation


YELLOW = "\x1b[33m"
RESET = "\x1b[0m"


def yes_or_no(question, default):
    if default:
        question += " [Y/n]: "
    else:
        question += " [y/N]: "

    var = None
    while var is None:
        user_input = ask_input(question).strip().lower()
        if user_input == "y":
            var = True
        elif user_input == "n":
            var = False
        elif not user_input:
            var = default
        else:
            print("Invalid selection: {}".format(user_input))
    return var


def ask_input(msg):
    return input(f"{YELLOW}ACTION: {RESET}{msg}")


def from_user_input():
    name = ask_input("Please enter the module name: ")
    version = ask_input("Please enter the module version: ")
    compatibility = ask_input("Please enter the compatibility level [default is 0]: ") or "0"
    module = Module(name, version, compatibility)

    url = ask_input("Please enter the URL of the source archive: ")
    strip_prefix = ask_input("Please enter the strip_prefix value of the archive [default None]: ") or None
    module.set_source(url, strip_prefix)

    if yes_or_no("Do you want to add patch files?", False):
        patches = ask_input("Please enter patch file paths, separated by `,`: ")
        for patch in patches.strip().split(","):
            module.add_patch(patch.strip())
        patch_strip = (
            ask_input("Please enter the patch strip number [Default is 1, compatible with git generated " "patches]: ")
            or "1"
        )
        module.set_patch_strip(int(patch_strip.strip()))

    if yes_or_no("Do you want to add a BUILD file?", False):
        build_file = ask_input("Please enter the path of the BUILD file to be added: ")
        module.set_build_file(build_file.strip())

    if yes_or_no("Do you want to specify a MODULE.bazel file?", False):
        path = ask_input("Please enter the MODULE.bazel file path: ").strip()
        module.set_module_dot_bazel(path)
    else:
        if yes_or_no("Do you want to specify dependencies for this module?", False):
            deps = ask_input("Please enter dependencies in the form of <name>@<version>, separated by `,`: ")
            for dep in deps.strip().split(","):
                name, version = dep.split("@")
                module.add_dep(name, version)

    presubmit_url = "https://github.com/bazelbuild/bazel-central-registry/tree/main/docs#presubmit"
    if yes_or_no(f"Do you want to specify an existing presubmit.yml file? (See {presubmit_url})", False):
        path = ask_input("Please enter the presubmit.yml file path: ").strip()
        module.set_presubmit_yml(path)
    else:
        first = True
        while not module.build_targets:
            if not first:
                print("Build targets cannot be empty, please re-enter!")
            first = False
            build_targets = ask_input(
                "Please enter a list of build targets you want to expose to downstream users, separated by `,`: "
            )
            for target in build_targets.strip().split(","):
                if target:
                    module.add_build_target(target)

        if yes_or_no("Do you have a test module in your source archive?", True):
            module.test_module_path = ask_input("Please enter the test module path in your source archive: ")
            first = True
            while not (module.test_module_build_targets or module.test_module_test_targets):
                if not first:
                    print("Build targets and test targets cannot both be empty, please re-enter!")
                first = False
                build_targets = ask_input(
                    "Please enter a list of build targets for the test module, separated by `,`: "
                )
                for target in build_targets.strip().split(","):
                    if target:
                        module.add_test_module_build_target(target)
                test_targets = ask_input("Please enter a list of test targets for the test module, separated by `,`: ")
                for target in test_targets.strip().split(","):
                    if target:
                        module.add_test_module_test_target(target)
    return module


def get_maintainers_from_input():
    maintainers = []
    prefix = "a"
    explain = (
        " (See https://github.com/bazelbuild/bazel-central-registry/tree/main"
        "/docs/bcr-policies.md#become-a-module-maintainer)"
    )
    while yes_or_no(f"Do you want to add {prefix} maintainer for this module?{explain}", False):
        maintainer = {}
        name = ask_input("Please enter maintainer name: ")
        maintainer["name"] = name
        email = ask_input("Please enter the maintainer's email address: ")
        maintainer["email"] = email
        username = ask_input("(Optional) Please enter the maintainer's github username: ")
        if username:
            maintainer["github"] = username
        maintainers.append(maintainer)
        prefix = "another"
        explain = ""
    return maintainers


def main(argv=None):
    if argv is None:
        argv = sys.argv[1:]

    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--registry",
        type=str,
        default=".",
        help="Specify the root path of the registry (default: the current working directory).",
    )
    parser.add_argument(
        "--input",
        type=str,
        help="Take module information from a json file, which can be generated from previous input.",
    )

    args = parser.parse_args(argv)

    if args.input:
        log(f"Getting module information from {args.input}...")
        module = Module()
        module.from_json(args.input)
    else:
        log("Getting module information from user input...")
        module = from_user_input()
        timestamp = time.strftime("%Y%m%d-%H%M%S")
        log(f"Saving module information to {module.name}.{timestamp}.json")
        log(f"You can use it via --input={module.name}.{timestamp}.json")
        module.dump(f"{module.name}.{timestamp}.json")

    client = RegistryClient(args.registry)

    if not client.contains(module.name):
        log(f"{module.name} is a new Bazel module...")
        homepage = ask_input("Please enter the homepage url for this module: ").strip()
        maintainers = get_maintainers_from_input()
        source_repository = ""
        if module.url.startswith("https://github.com/"):
            parts = module.url.split("/")
            source_repository = "github:" + parts[3] + "/" + parts[4]
        client.init_module(module.name, maintainers, homepage, source_repository)

    client.add(module, override=True)
    log(f"{module.name} {module.version} is added into the registry.")

    log(f"Running ./tools/bcr_validation.py --check={module.name}@{module.version} --fix")
    bcr_validation.main([f"--check={module.name}@{module.version}", "--fix"])


if __name__ == "__main__":
    # Under 'bazel run' we want to run within the source folder instead of the execroot.
    if os.getenv("BUILD_WORKSPACE_DIRECTORY"):
        os.chdir(os.getenv("BUILD_WORKSPACE_DIRECTORY"))
    sys.exit(main())