import os
import string
import subprocess
from typing import Text, List, Tuple, Dict, Set, NoReturn

import jinja2
from loguru import logger
from sentry_sdk import capture_exception

from httprunner import exceptions, __version__
from httprunner.compat import ensure_testcase_v3_api, ensure_testcase_v3
from httprunner.loader import (
    load_folder_files,
    load_test_file,
    load_testcase,
    load_testsuite,
    load_project_meta,
)
from httprunner.parser import parse_data
from httprunner.response import uniform_validator

""" cache converted pytest files, avoid duplicate making
"""
pytest_files_made_cache_mapping: Dict[Text, Text] = {}

""" save generated pytest files to run, except referenced testcase
"""
pytest_files_run_set: Set = set()

__TEMPLATE__ = jinja2.Template(
    """# NOTICE: Generated By HttpRunner v{{ version }}
# FROM: {{ testcase_path }}
{% if imports_list %}
import os
import sys

sys.path.insert(0, os.getcwd())
{% endif %}
from httprunner import HttpRunner, Config, Step, RunRequest, RunTestCase
{% for import_str in imports_list %}
{{ import_str }}
{% endfor %}

class {{ class_name }}(HttpRunner):
    config = {{ config_chain_style }}

    teststeps = [
        {% for step_chain_style in teststeps_chain_style %}
            {{ step_chain_style }},
        {% endfor %}
    ]

if __name__ == "__main__":
    {{ class_name }}().test_start()

"""
)


def __ensure_file_name(path: Text) -> Text:
    """ ensure file name not startswith digit
        testcases/19.json => testcases/T19.json
    """
    filename = os.path.basename(path)
    if filename[0] in string.digits:
        path = os.path.join(os.path.dirname(path), f"T{filename}")

    return path


def __ensure_absolute(path: Text) -> Text:
    project_meta = load_project_meta(path)

    if os.path.isabs(path):
        absolute_path = path
    else:
        absolute_path = os.path.join(project_meta.PWD, path)

    return absolute_path


def __ensure_cwd_relative(path: Text) -> Text:
    """ convert absolute path to relative path, based on os.getcwd()

    Args:
        path: absolute path

    Returns: relative path based on os.getcwd()

    """
    if os.path.isabs(path):
        return path[len(os.getcwd()) + 1 :]
    else:
        return path


def __ensure_testcase_module(path: Text) -> NoReturn:
    """ ensure pytest files are in python module, generate __init__.py on demand
    """
    init_file = os.path.join(os.path.dirname(path), "__init__.py")
    if os.path.isfile(init_file):
        return

    with open(init_file, "w", encoding="utf-8") as f:
        f.write("# NOTICE: Generated By HttpRunner. DO NOT EDIT!\n")


def convert_testcase_path(testcase_path: Text) -> Tuple[Text, Text]:
    """convert single YAML/JSON testcase path to python file"""
    if os.path.isdir(testcase_path):
        # folder does not need to convert
        return testcase_path, ""

    testcase_path = __ensure_file_name(testcase_path)
    raw_file_name, file_suffix = os.path.splitext(os.path.basename(testcase_path))

    file_suffix = file_suffix.lower()
    if file_suffix not in [".json", ".yml", ".yaml", ".har"]:
        raise exceptions.ParamsError(
            "testcase file should have .yaml/.yml/.json suffix"
        )

    file_name = raw_file_name.replace(" ", "_").replace(".", "_").replace("-", "_")
    testcase_dir = os.path.dirname(testcase_path)
    testcase_python_path = os.path.join(testcase_dir, f"{file_name}_test.py")

    # convert title case, e.g. request_with_variables => RequestWithVariables
    name_in_title_case = file_name.title().replace("_", "")

    return testcase_python_path, name_in_title_case


def format_pytest_with_black(*python_paths: Text) -> NoReturn:
    logger.info("format pytest cases with black ...")
    try:
        subprocess.run(["black", *python_paths])
    except subprocess.CalledProcessError as ex:
        capture_exception(ex)
        logger.error(ex)


def make_config_chain_style(config: Dict) -> Text:
    config_chain_style = f'Config("{config["name"]}")'

    if config["variables"]:
        variables = config["variables"]
        config_chain_style += f".variables(**{variables})"

    if "base_url" in config:
        config_chain_style += f'.base_url("{config["base_url"]}")'

    if "verify" in config:
        config_chain_style += f'.verify({config["verify"]})'

    if "export" in config:
        config_chain_style += f'.export(*{config["export"]})'

    return config_chain_style


def make_request_chain_style(request: Dict) -> Text:
    method = request["method"].lower()
    url = request["url"]
    request_chain_style = f'.{method}("{url}")'

    if "params" in request:
        params = request["params"]
        request_chain_style += f".with_params(**{params})"

    if "headers" in request:
        headers = request["headers"]
        request_chain_style += f".with_headers(**{headers})"

    if "cookies" in request:
        cookies = request["cookies"]
        request_chain_style += f".with_cookies(**{cookies})"

    if "data" in request:
        data = request["data"]
        if isinstance(data, Text):
            data = f'"{data}"'
        request_chain_style += f".with_data({data})"

    if "json" in request:
        req_json = request["json"]
        request_chain_style += f".with_json({req_json})"

    if "timeout" in request:
        timeout = request["timeout"]
        request_chain_style += f".set_timeout({timeout})"

    if "verify" in request:
        verify = request["verify"]
        request_chain_style += f".set_verify({verify})"

    if "allow_redirects" in request:
        allow_redirects = request["allow_redirects"]
        request_chain_style += f".set_allow_redirects({allow_redirects})"

    if "upload" in request:
        upload = request["upload"]
        request_chain_style += f".upload(**{upload})"

    return request_chain_style


def make_teststep_chain_style(teststep: Dict) -> Text:
    if teststep.get("request"):
        step_info = f'RunRequest("{teststep["name"]}")'
    elif teststep.get("testcase"):
        step_info = f'RunTestCase("{teststep["name"]}")'
    else:
        raise exceptions.TestCaseFormatError(f"Invalid teststep: {teststep}")

    if "variables" in teststep:
        variables = teststep["variables"]
        step_info += f".with_variables(**{variables})"

    if teststep.get("request"):
        step_info += make_request_chain_style(teststep["request"])
    elif teststep.get("testcase"):
        testcase = teststep["testcase"]
        call_ref_testcase = f".call({testcase})"
        step_info += call_ref_testcase

    if "extract" in teststep:
        # request step
        step_info += ".extract()"
        for extract_name, extract_path in teststep["extract"].items():
            step_info += f'.with_jmespath("{extract_path}", "{extract_name}")'

    if "export" in teststep:
        # reference testcase step
        export: List[Text] = teststep["export"]
        step_info += f".export(*{export})"

    if "validate" in teststep:
        step_info += ".validate()"

        for v in teststep["validate"]:
            validator = uniform_validator(v)
            assert_method = validator["assert"]
            check = validator["check"]
            if '"' in check:
                # e.g. body."user-agent" => 'body."user-agent"'
                check = f"'{check}'"
            else:
                check = f'"{check}"'
            expect = validator["expect"]
            if isinstance(expect, Text):
                expect = f'"{expect}"'
            step_info += f".assert_{assert_method}({check}, {expect})"

    return f"Step({step_info})"


def make_testcase(testcase: Dict, dir_path: Text = None) -> Text:
    """convert valid testcase dict to pytest file path"""
    # ensure compatibility with testcase format v2
    testcase = ensure_testcase_v3(testcase)

    # validate testcase format
    load_testcase(testcase)

    testcase_path = __ensure_absolute(testcase["config"]["path"])
    logger.info(f"start to make testcase: {testcase_path}")

    testcase_python_path, testcase_cls_name = convert_testcase_path(testcase_path)
    if dir_path:
        testcase_python_path = os.path.join(
            dir_path, os.path.basename(testcase_python_path)
        )

    global pytest_files_made_cache_mapping
    if testcase_python_path in pytest_files_made_cache_mapping:
        return testcase_python_path

    config = testcase["config"]
    config["path"] = __ensure_cwd_relative(testcase_python_path)

    # parse config variables
    config.setdefault("variables", {})
    if isinstance(config["variables"], Text):
        # get variables by function, e.g. ${get_variables()}
        project_meta = load_project_meta(testcase_path)
        config["variables"] = parse_data(
            config["variables"], {}, project_meta.functions
        )

    # prepare reference testcase
    imports_list = []
    teststeps = testcase["teststeps"]
    for teststep in teststeps:
        if not teststep.get("testcase"):
            continue

        # make ref testcase pytest file
        ref_testcase_path = __ensure_absolute(teststep["testcase"])
        test_content = load_test_file(ref_testcase_path)
        test_content.setdefault("config", {})["path"] = ref_testcase_path
        ref_testcase_python_path = make_testcase(test_content)

        # prepare ref testcase class name
        ref_testcase_cls_name = pytest_files_made_cache_mapping[
            ref_testcase_python_path
        ]
        teststep["testcase"] = ref_testcase_cls_name

        # prepare import ref testcase
        ref_testcase_python_path = ref_testcase_python_path[len(os.getcwd()) + 1 :]
        ref_module_name, _ = os.path.splitext(ref_testcase_python_path)
        ref_module_name = ref_module_name.replace(os.sep, ".")
        imports_list.append(
            f"from {ref_module_name} import TestCase{ref_testcase_cls_name} as {ref_testcase_cls_name}"
        )

    data = {
        "version": __version__,
        "testcase_path": __ensure_cwd_relative(testcase_path),
        "class_name": f"TestCase{testcase_cls_name}",
        "imports_list": imports_list,
        "config_chain_style": make_config_chain_style(config),
        "teststeps_chain_style": [
            make_teststep_chain_style(step) for step in teststeps
        ],
    }
    content = __TEMPLATE__.render(data)

    with open(testcase_python_path, "w", encoding="utf-8") as f:
        f.write(content)

    pytest_files_made_cache_mapping[testcase_python_path] = testcase_cls_name
    __ensure_testcase_module(testcase_python_path)

    logger.info(f"generated testcase: {testcase_python_path}")

    return testcase_python_path


def make_testsuite(testsuite: Dict) -> NoReturn:
    """convert valid testsuite dict to pytest folder with testcases"""
    # validate testsuite format
    load_testsuite(testsuite)

    testsuite_config = testsuite["config"]
    testsuite_path = testsuite_config["path"]

    testsuite_variables = testsuite_config.get("variables", {})
    if isinstance(testsuite_variables, Text):
        # get variables by function, e.g. ${get_variables()}
        project_meta = load_project_meta(testsuite_path)
        testsuite_variables = parse_data(
            testsuite_variables, {}, project_meta.functions
        )

    logger.info(f"start to make testsuite: {testsuite_path}")

    # create directory with testsuite file name, put its testcases under this directory
    testsuite_dir = os.path.join(
        os.path.dirname(testsuite_path),
        os.path.basename(testsuite_path).replace(".", "_"),
    )
    os.makedirs(testsuite_dir, exist_ok=True)

    for testcase in testsuite["testcases"]:
        # get referenced testcase content
        testcase_file = testcase["testcase"]
        testcase_path = __ensure_absolute(testcase_file)
        testcase_dict = load_test_file(testcase_path)
        testcase_dict.setdefault("config", {})
        testcase_dict["config"]["path"] = testcase_path

        # override testcase name
        testcase_dict["config"]["name"] = testcase["name"]
        # override base_url
        base_url = testsuite_config.get("base_url") or testcase.get("base_url")
        if base_url:
            testcase_dict["config"]["base_url"] = base_url
        # override verify
        if "verify" in testsuite_config:
            testcase_dict["config"]["verify"] = testsuite_config["verify"]
        # override variables
        testcase_dict["config"].setdefault("variables", {})
        testcase_dict["config"]["variables"].update(testcase.get("variables", {}))
        testcase_dict["config"]["variables"].update(testsuite_variables)

        # make testcase
        testcase_pytest_path = make_testcase(testcase_dict, testsuite_dir)
        pytest_files_run_set.add(testcase_pytest_path)


def __make(tests_path: Text) -> NoReturn:
    """ make testcase(s) with testcase/testsuite/folder absolute path
        generated pytest file path will be cached in pytest_files_made_cache_mapping

    Args:
        tests_path: should be in absolute path

    """
    test_files = []
    if os.path.isdir(tests_path):
        files_list = load_folder_files(tests_path)
        test_files.extend(files_list)
    elif os.path.isfile(tests_path):
        test_files.append(tests_path)
    else:
        raise exceptions.TestcaseNotFound(f"Invalid tests path: {tests_path}")

    for test_file in test_files:
        if test_file.lower().endswith("_test.py"):
            pytest_files_run_set.add(test_file)
            continue

        try:
            test_content = load_test_file(test_file)
        except (exceptions.FileNotFound, exceptions.FileFormatError) as ex:
            logger.warning(ex)
            continue

        # api in v2 format, convert to v3 testcase
        if "request" in test_content:
            test_content = ensure_testcase_v3_api(test_content)

        if not (isinstance(test_content, Dict) and "config" in test_content):
            raise exceptions.FileFormatError("Invalid testcase/testsuite v2/v3 format!")

        test_content.setdefault("config", {})["path"] = test_file

        # testcase
        if "teststeps" in test_content:
            try:
                testcase_pytest_path = make_testcase(test_content)
                pytest_files_run_set.add(testcase_pytest_path)
            except exceptions.TestCaseFormatError:
                continue

        # testsuite
        elif "testcases" in test_content:
            try:
                make_testsuite(test_content)
            except exceptions.TestSuiteFormatError:
                continue

        # invalid format
        else:
            logger.warning(f"skip invalid testcase/testsuite file: {test_file}")


def main_make(tests_paths: List[Text]) -> List[Text]:
    if not tests_paths:
        return []

    for tests_path in tests_paths:
        if not os.path.isabs(tests_path):
            tests_path = os.path.join(os.getcwd(), tests_path)

        __make(tests_path)

    # format pytest files
    pytest_files_format_list = pytest_files_made_cache_mapping.keys()
    format_pytest_with_black(*pytest_files_format_list)

    return list(pytest_files_run_set)


def init_make_parser(subparsers):
    """ make testcases: parse command line options and run commands.
    """
    parser = subparsers.add_parser(
        "make", help="Convert YAML/JSON testcases to pytest cases.",
    )
    parser.add_argument(
        "testcase_path", nargs="*", help="Specify YAML/JSON testcase file/folder path"
    )

    return parser