import sys
import time
from typing import List, Dict, Any
import argparse
import json
import logging
from pathlib import Path
from subprocess import check_call, getoutput
import shutil
import re
import os
from functools import partial

try:
    # py 311 adds this library natively
    import tomllib as toml
except:
    # otherwise fall back to pypi package tomli
    import tomli as toml
import tomli_w as tomlw

from .swaggertosdk.SwaggerToSdkCore import (
    CONFIG_FILE,
)
from .generate_sdk import generate
from .generate_utils import (
    get_package_names,
    init_new_service,
    update_servicemetadata,
    judge_tag_preview,
    format_samples_and_tests,
    gen_dpg,
    dpg_relative_folder,
    gen_typespec,
    return_origin_path,
    check_api_version_in_subfolder,
    call_build_config,
    del_outdated_generated_files,
)
from .conf import CONF_NAME

logging.basicConfig(
    stream=sys.stdout,
    format="%(asctime)s [%(levelname)s] %(message)s",
    datefmt="%Y-%m-%d %X",
)
_LOGGER = logging.getLogger(__name__)


def is_multiapi_package(python_md_content: List[str]) -> bool:
    for line in python_md_content:
        if re.findall(r"\s*multiapi\s*:\s*true", line):
            return True
    return False


# return relative path like: network/azure-mgmt-network
def extract_sdk_folder(python_md: List[str]) -> str:
    pattern = ["$(python-sdks-folder)", "azure-mgmt-"]
    for line in python_md:
        if all(p in line for p in pattern):
            return re.findall("[a-z]+/[a-z]+-[a-z]+-[a-z]+[-a-z]*", line)[0]
    return ""


# readme: ../azure-rest-api-specs/specification/paloaltonetworks/resource-manager/readme.md or absolute path
def get_readme_python_content(readme: str) -> List[str]:
    python_readme = Path(readme).parent / "readme.python.md"
    if not python_readme.exists():
        _LOGGER.info(f"do not find python configuration: {python_readme}")
        return []

    with open(python_readme, "r") as file_in:
        return file_in.readlines()


# readme: ../azure-rest-api-specs/specification/paloaltonetworks/resource-manager/readme.md
def del_outdated_files(readme: str):
    content = get_readme_python_content(readme)
    sdk_folder = extract_sdk_folder(content)
    is_multiapi = is_multiapi_package(content)
    if sdk_folder:
        # remove tsp-location.yaml
        tsp_location = Path(f"sdk/{sdk_folder}/tsp-location.yaml")
        if tsp_location.exists():
            os.remove(str(tsp_location))
            _LOGGER.info(f"remove tsp-location.yaml: {tsp_location}")
        # remove generated_samples
        sample_folder = Path(f"sdk/{sdk_folder}/generated_samples")
        if sample_folder.exists():
            # rdbms is generated from different swagger folder;multiapi package may don't generate every time
            if "azure-mgmt-rdbms" not in str(sample_folder) and not is_multiapi:
                shutil.rmtree(sample_folder)
                _LOGGER.info(f"remove sample folder: {sample_folder}")
            else:
                _LOGGER.info(f"we don't remove sample folder for rdbms or multiapi package")
        else:
            _LOGGER.info(f"sample folder does not exist: {sample_folder}")
    else:
        _LOGGER.info(f"do not find valid sdk_folder in {python_readme}")


# look for fines in tag like:
# ``` yaml $(tag) == 'package-2023-05-01-preview-only'
# input-file:
# - Microsoft.Insights/preview/2023-05-01-preview/tenantActionGroups_API.json
# ```
def get_related_swagger(readme_content: List[str], tag: str) -> List[str]:
    result = []
    for idx in range(len(readme_content)):
        line = readme_content[idx]
        if tag in line and "```" in line and "tag" in line and "==" in line and "yaml" in line:
            idx += 1
            while idx < len(readme_content):
                if "```" in readme_content[idx]:
                    break
                if ".json" in readme_content[idx] and (
                    re.compile(r"\d{4}-\d{1,2}-\d{1,2}").findall(readme_content[idx])
                    or "Microsoft." in readme_content[idx]
                ):
                    result.append(readme_content[idx].strip("\n -"))
                idx += 1
            break
    return result


def get_last_commit_info(files: List[str]) -> str:
    result = [getoutput(f'git log -1 --pretty="format:%ai %H" {f}').strip("\n ") + " " + f for f in files]
    result.sort()
    return result[-1]


# input_readme: "specification/paloaltonetworks/resource-manager/readme.md"
# source: content of readme.python.md
# work directory is in root folder of azure-rest-api-specs
@return_origin_path
def choose_tag_and_update_meta(
    idx: int, source: List[str], target: List[str], input_readme: str, meta: Dict[str, Any], need_regenerate: bool
) -> int:
    os.chdir(str(Path(input_readme).parent))
    with open("readme.md", "r") as file_in:
        readme_content = file_in.readlines()

    while idx < len(source):
        if "```" in source[idx]:
            break
        if "tag:" in source[idx]:
            tag = source[idx].split("tag:")[-1].strip("\n ")
            related_files = get_related_swagger(readme_content, tag)
            if related_files:
                commit_info = get_last_commit_info(related_files)
                recorded_info = meta.get(tag, "")
                # there may be new commit after last release
                if need_regenerate or commit_info > recorded_info:
                    _LOGGER.info(f"update tag: {tag} with commit info {commit_info}")
                    meta[tag] = commit_info
                    target.append(source[idx])
                else:
                    _LOGGER.info(f"skip tag: {tag} since commit info doesn't change")
            else:
                _LOGGER.warning(f"do not find related swagger for tag: {tag}")
        else:
            target.append(source[idx])
        idx += 1
    return idx


def extract_version_info(config: Dict[str, Any]) -> str:
    autorest_version = config.get("autorest", "")
    autorest_modelerfour_version = config.get("use", [])
    return autorest_version + "".join(autorest_modelerfour_version)


def if_need_regenerate(meta: Dict[str, Any]) -> bool:
    with open(str(Path("../azure-sdk-for-python", CONFIG_FILE)), "r") as file_in:
        config = json.load(file_in)
    current_info = config["meta"]["autorest_options"]["version"] + "".join(
        sorted(config["meta"]["autorest_options"]["use"])
    )
    recorded_info = meta["autorest"] + "".join(sorted(meta["use"]))
    return recorded_info != current_info


# spec_folder: "../azure-rest-api-specs"
# input_readme: "specification/paloaltonetworks/resource-manager/readme.md"
@return_origin_path
def need_regen_for_multiapi_package(spec_folder: str, input_readme: str) -> bool:
    os.chdir(spec_folder)
    python_readme = (Path(input_readme).parent / "readme.python.md").absolute()
    if not python_readme.exists():
        _LOGGER.info(f"do not find python configuration: {python_readme}")
        return False

    with open(python_readme, "r") as file_in:
        python_md_content = file_in.readlines()
    is_multiapi = is_multiapi_package(python_md_content)
    if not is_multiapi:
        _LOGGER.info(f"do not find multiapi configuration in {python_readme}")
        return False

    after_handle = []
    for idx in range(len(python_md_content)):
        if re.findall(r"\s*clear-output-folder\s*:\s*true\s*", python_md_content[idx]):
            continue
        if re.findall(r"\s*-\s*tag\s*:", python_md_content[idx]):
            continue
        after_handle.append(python_md_content[idx])

    with open(python_readme, "w") as file_out:
        file_out.writelines(after_handle)
    return True


def main(generate_input, generate_output):
    with open(generate_input, "r") as reader:
        data = json.load(reader)

    spec_folder = data["specFolder"]
    sdk_folder = "."
    result = {}
    python_tag = data.get("python_tag")
    package_total = set()
    readme_and_tsp = data.get("relatedReadmeMdFiles", []) + data.get("relatedTypeSpecProjectFolder", [])
    run_in_pipeline = data.get("runMode") is not None
    for readme_or_tsp in readme_and_tsp:
        _LOGGER.info(f"[CODEGEN]({readme_or_tsp})codegen begin")
        try:
            code_generation_start_time = time.time()
            if "resource-manager" in readme_or_tsp:
                relative_path_readme = str(Path(spec_folder, readme_or_tsp))
                del_outdated_files(relative_path_readme)
                generate_mgmt = partial(
                    generate,
                    CONFIG_FILE,
                    sdk_folder,
                    [],
                    relative_path_readme,
                    spec_folder,
                    force_generation=True,
                    python_tag=python_tag,
                )
                config = generate_mgmt()
                if need_regen_for_multiapi_package(spec_folder, readme_or_tsp):
                    generate_mgmt()
            elif "data-plane" in readme_or_tsp:
                config = gen_dpg(readme_or_tsp, data.get("autorestConfig", ""), dpg_relative_folder(spec_folder))
            else:
                del_outdated_generated_files(str(Path(spec_folder, readme_or_tsp)))
                config = gen_typespec(
                    readme_or_tsp,
                    spec_folder,
                    data["headSha"],
                    data["repoHttpsUrl"],
                    run_in_pipeline,
                    data.get("apiVersion"),
                )
            _LOGGER.info(f"code generation cost time: {int(time.time() - code_generation_start_time)} seconds")
        except Exception as e:
            _LOGGER.error(f"fail to generate sdk for {readme_or_tsp}: {str(e)}")
            for hint_message in [
                "======================================= Whant Can I do (begin) ========================================================================",
                f"Fail to generate sdk for {readme_or_tsp}. If you are from service team, please first check if the failure happens only to Python automation, or for all SDK automations. ",
                "If it happens for all SDK automations, please double check your Swagger / Typespec, and check whether there is error in ModelValidation and LintDiff. ",
                "If it happens to Python alone, you can open an issue to https://github.com/Azure/autorest.python/issues. Please include the link of this Pull Request in the issue.",
                "======================================= Whant Can I do (end) =========================================================================",
            ]:
                _LOGGER.error(hint_message)
            if len(readme_and_tsp) == 1:
                raise e

        # folder_name: "sdk/containerservice"; package_name: "azure-mgmt-containerservice"
        package_names = get_package_names(sdk_folder)
        spec_word = "readmeMd" if "readme.md" in readme_or_tsp else "typespecProject"
        for folder_name, package_name in package_names:
            if package_name in package_total:
                continue

            _LOGGER.info(
                f"[CODEGEN]({readme_or_tsp})codegen end and new package '{folder_name}/{package_name}' generated"
            )
            try:
                package_total.add(package_name)
                sdk_code_path = str(Path(sdk_folder, folder_name, package_name))
                if package_name not in result:
                    package_entry = {}
                    package_entry["packageName"] = package_name
                    package_entry["path"] = [folder_name]
                    package_entry[spec_word] = [readme_or_tsp]
                    package_entry["tagIsStable"] = not judge_tag_preview(sdk_code_path, package_name)
                    readme_python_content = get_readme_python_content(str(Path(spec_folder) / readme_or_tsp))
                    package_entry["isMultiapi"] = is_multiapi_package(readme_python_content)
                    package_entry["targetReleaseDate"] = data.get("targetReleaseDate", "")
                    package_entry["allowInvalidNextVersion"] = data.get("allowInvalidNextVersion", False)
                    result[package_name] = package_entry
                else:
                    result[package_name]["path"].append(folder_name)
                    result[package_name][spec_word].append(readme_or_tsp)

                # Generate some necessary file for new service
                init_new_service(package_name, folder_name)
                format_samples_and_tests(sdk_code_path)

                # Update metadata
                try:
                    update_servicemetadata(
                        sdk_folder,
                        data,
                        config,
                        folder_name,
                        package_name,
                        spec_folder,
                        readme_or_tsp,
                    )
                except Exception as e:
                    _LOGGER.error(f"fail to update meta: {str(e)}")

                # Setup package locally
                check_call(
                    f"pip install --ignore-requires-python -e {sdk_code_path}",
                    shell=True,
                )

                # check whether multiapi package has only one api-version in per subfolder
                check_api_version_in_subfolder(sdk_code_path)

                # could be removed in the short future
                result[package_name]["afterMultiapiCombiner"] = False
            except Exception as e:
                _LOGGER.error(f"fail to setup package: {str(e)}")

    # remove duplicates
    try:
        for value in result.values():
            value["path"] = list(set(value["path"]))
            if value.get("typespecProject"):
                value["typespecProject"] = list(set(value["typespecProject"]))
            if value.get("readmeMd"):
                value["readmeMd"] = list(set(value["readmeMd"]))
    except Exception as e:
        _LOGGER.error(f"fail to remove duplicates: {str(e)}")

    if len(result) == 0 and len(readme_and_tsp) > 1:
        raise Exception("No package is generated, please check the log for details")

    with open(generate_output, "w") as writer:
        json.dump(result, writer)


def generate_main():
    """Main method"""

    parser = argparse.ArgumentParser(
        description="Build SDK using Autorest, offline version.",
        formatter_class=argparse.RawTextHelpFormatter,
    )
    parser.add_argument("generate_input", help="Generate input file path")
    parser.add_argument("generate_output", help="Generate output file path")
    parser.add_argument(
        "-v",
        "--verbose",
        dest="verbose",
        action="store_true",
        help="Verbosity in INFO mode",
    )
    parser.add_argument("--debug", dest="debug", action="store_true", help="Verbosity in DEBUG mode")
    parser.add_argument(
        "-c",
        "--codegen",
        dest="debug",
        action="store_true",
        help="Verbosity in DEBUG mode",
    )

    args = parser.parse_args()
    main_logger = logging.getLogger()
    logging.basicConfig()
    main_logger.setLevel(logging.DEBUG if args.verbose or args.debug else logging.INFO)

    main(args.generate_input, args.generate_output)


if __name__ == "__main__":
    generate_main()