"""
@Project: BeautifulReport
@Author: Raymond Mocobk
@Data: 2019/03/20
@File: __init__.py.py
@License: MIT
"""

import os
import sys
from io import StringIO as StringIO
import time
import json
import unittest
import platform
import base64
from distutils.sysconfig import get_python_lib
import traceback
from functools import wraps

__all__ = ['BeautifulReport']

HTML_IMG_TEMPLATE = """
    <a href="data:image/png;base64, {}">
    <img src="data:image/png;base64, {}" width="800px" height="500px"/>
    </a>
    <br></br>
"""
origin_stdout = sys.stdout


def output2console(s):
    """将stdout内容输出到console"""
    tmp_stdout = sys.stdout
    sys.stdout = origin_stdout
    print(s, end='')
    sys.stdout = tmp_stdout


class OutputRedirector(object):
    """ Wrapper to redirect stdout or stderr """

    def __init__(self, fp):
        self.fp = fp

    def write(self, s):
        self.fp.write(s)
        output2console(s)

    def writelines(self, lines):
        self.fp.writelines(lines)

    def flush(self):
        self.fp.flush()


stdout_redirector = OutputRedirector(sys.stdout)
stderr_redirector = OutputRedirector(sys.stderr)

SYSSTR = platform.system()
SITE_PAKAGE_PATH = get_python_lib()


class PATH:
    """ all file PATH meta """
    template_path = os.path.join(os.path.dirname(__file__), 'template')
    config_tmp_path = os.path.join(template_path, 'template.html')


class MakeResultJson:
    """ make html table tags """

    def __init__(self, datas: tuple):
        """
        init self object
        :param datas: 拿到所有返回数据结构
        """
        self.datas = datas
        self.result_schema = {}

    def __setitem__(self, key, value):
        """
        
        :param key: self[key]
        :param value: value
        :return:
        """
        self[key] = value

    def __repr__(self) -> str:
        """
            返回对象的html结构体
        :rtype: dict
        :return: self的repr对象, 返回一个构造完成的tr表单
        """
        keys = (
            'className',
            'methodName',
            'description',
            'spendTime',
            'status',
            'log',
        )
        for key, data in zip(keys, self.datas):
            self.result_schema.setdefault(key, data)
        return json.dumps(self.result_schema)


class ReportTestResult(unittest.TestResult):
    """ override"""

    def __init__(self, suite, stream=sys.stdout):
        """ pass """
        super(ReportTestResult, self).__init__()
        self.begin_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
        self.start_time = 0
        self.stream = stream
        self.end_time = 0
        self.failure_count = 0
        self.error_count = 0
        self.success_count = 0
        self.skipped = 0
        self.verbosity = 1
        self.success_case_info = []
        self.skipped_case_info = []
        self.failures_case_info = []
        self.errors_case_info = []
        self.all_case_counter = 0
        self.suite = suite
        self.status = ''
        self.result_list = []
        self.case_log = ''
        self.default_report_name = '自动化测试报告'
        self.sys_stdout = None
        self.sys_stderr = None
        self.outputBuffer = StringIO()
        self.fields = {
            "testPass": 0,
            "testResult": [],
            "testName": "",
            "testAll": 0,
            "testFail": 0,
            "beginTime": "",
            "totalTime": "",
            "testSkip": 0
        }

    @property
    def success_counter(self) -> int:
        """ set success counter """
        return self.success_count

    @success_counter.setter
    def success_counter(self, value) -> None:
        """
            success_counter函数的setter方法, 用于改变成功的case数量
        :param value: 当前传递进来的成功次数的int数值
        :return:
        """
        self.success_count = value

    def startTest(self, test) -> None:
        """
            当测试用例测试即将运行时调用
        :return:
        """
        unittest.TestResult.startTest(self, test)
        stdout_redirector.fp = self.outputBuffer
        stderr_redirector.fp = self.outputBuffer
        self.sys_stdout = sys.stdout
        self.sys_stdout = sys.stderr
        sys.stdout = stdout_redirector
        sys.stderr = stderr_redirector
        self.start_time = time.time()

    def stopTest(self, test) -> None:
        """
            当测试用力执行完成后进行调用
        :return:
        """
        self.end_time = '{0:.3} s'.format((time.time() - self.start_time))
        self.result_list.append(self.get_all_result_info_tuple(test))
        self.complete_output()

    def complete_output(self):
        """
        Disconnect output redirection and return buffer.
        Safe to call multiple times.
        """
        if self.sys_stdout:
            sys.stdout = self.sys_stdout
            sys.stderr = self.sys_stdout
            self.sys_stdout = None
            self.sys_stdout = None
        return self.outputBuffer.getvalue()

    def stopTestRun(self, title=None) -> dict:
        """
            所有测试执行完成后, 执行该方法
        :param title:
        :return:
        """
        self.fields['testPass'] = self.success_counter
        for item in self.result_list:
            item = json.loads(str(MakeResultJson(item)))
            self.fields.get('testResult').append(item)
        self.fields['testAll'] = len(self.result_list)
        self.fields['testName'] = title if title else self.default_report_name
        self.fields['testFail'] = self.failure_count
        self.fields['beginTime'] = self.begin_time
        end_time = int(time.time())
        start_time = int(time.mktime(time.strptime(self.begin_time, '%Y-%m-%d %H:%M:%S')))
        self.fields['totalTime'] = str(end_time - start_time) + 's'
        self.fields['testError'] = self.error_count
        self.fields['testSkip'] = self.skipped
        return self.fields

    def get_all_result_info_tuple(self, test) -> tuple:
        """
            接受test 相关信息, 并拼接成一个完成的tuple结构返回
        :param test:
        :return:
        """
        return tuple([*self.get_testcase_property(test), self.end_time, self.status, self.case_log])

    @staticmethod
    def error_or_failure_text(err) -> str:
        """
            获取sys.exc_info()的参数并返回字符串类型的数据, 去掉t6 error
        :param err:
        :return:
        """
        return traceback.format_exception(*err)

    def addSuccess(self, test) -> None:
        """
            pass
        :param test:
        :return:
        """
        logs = []
        output = self.complete_output()
        logs.append(output)
        if self.verbosity > 1:
            sys.stderr.write('ok ')
            sys.stderr.write(str(test))
            sys.stderr.write('\n')
        else:
            sys.stderr.write('.')
        self.success_counter += 1
        self.status = '成功'
        self.case_log = output.split('\n')
        self._mirrorOutput = True  # print(class_name, method_name, method_doc)

    def addError(self, test, err):
        """
            add Some Error Result and infos
        :param test:
        :param err:
        :return:
        """
        logs = []
        output = self.complete_output()
        logs.append(output)
        logs.extend(self.error_or_failure_text(err))
        # output traceback info
        sys.stderr.write(''.join(traceback.format_exception(*err)) + '\n')
        self.failure_count += 1
        self.add_test_type('错误', logs)
        if self.verbosity > 1:
            sys.stderr.write('E  ')
            sys.stderr.write(str(test))
            sys.stderr.write('\n')
        else:
            sys.stderr.write('E')

        self._mirrorOutput = True

    def addFailure(self, test, err):
        """
            add Some Failures Result and infos
        :param test:
        :param err:
        :return:
        """
        logs = []
        output = self.complete_output()
        logs.append(output)
        logs.extend(self.error_or_failure_text(err))
        self.failure_count += 1
        self.add_test_type('失败', logs)
        if self.verbosity > 1:
            sys.stderr.write('F  ')
            sys.stderr.write(str(test))
            sys.stderr.write('\n')
        else:
            sys.stderr.write('F')

        self._mirrorOutput = True

    def addSkip(self, test, reason) -> None:
        """
            获取全部的跳过的case信息
        :param test:
        :param reason:
        :return: None
        """
        logs = [reason]
        self.complete_output()
        self.skipped += 1
        self.add_test_type('跳过', logs)

        if self.verbosity > 1:
            sys.stderr.write('S  ')
            sys.stderr.write(str(test))
            sys.stderr.write('\n')
        else:
            sys.stderr.write('S')
        self._mirrorOutput = True

    def add_test_type(self, status: str, case_log: list) -> None:
        """
            abstruct add test type and return tuple
        :param status:
        :param case_log:
        :return:
        """
        self.status = status
        self.case_log = case_log

    @staticmethod
    def get_testcase_property(test) -> tuple:
        """
            接受一个test, 并返回一个test的class_name, method_name, method_doc属性
        :param test:
        :return: (class_name, method_name, method_doc) -> tuple
        """
        class_name = test.__class__.__qualname__
        method_name = test.__dict__['_testMethodName']
        method_doc = test.__dict__['_testMethodDoc']
        return class_name, method_name, method_doc


class BeautifulReport(ReportTestResult, PATH):
    img_path = 'img/' if platform.system() != 'Windows' else 'img\\'

    def __init__(self, suites):
        super(BeautifulReport, self).__init__(suites)
        self.suites = suites
        self.report_dir = None
        self.title = '自动化测试报告'
        self.filename = 'report.html'

    def report(self, description, filename: str = None, report_dir='.', log_path=None, theme='theme_default'):
        """
            生成测试报告,并放在当前运行路径下
        :param report_dir: 生成report的文件存储路径
        :param filename: 生成文件的filename
        :param description: 生成文件的注释
        :param theme: 报告主题名 theme_default theme_cyan theme_candy theme_memories
        :return:
        """
        if log_path:
            import warnings
            message = ('"log_path" is deprecated, please replace with "report_dir"\n'
                       "e.g. result.report(filename='测试报告_demo', description='测试报告', report_dir='report')")
            warnings.warn(message)

        if filename:
            self.filename = filename if filename.endswith('.html') else filename + '.html'

        if description:
            self.title = description

        self.report_dir = os.path.abspath(report_dir)
        os.makedirs(self.report_dir, exist_ok=True)
        self.suites.run(result=self)
        self.stopTestRun(self.title)
        self.output_report(theme)
        text = '\n测试已全部完成, 可打开 {} 查看报告'.format(os.path.join(self.report_dir, self.filename))
        print(text)

    def output_report(self, theme):
        """
            生成测试报告到指定路径下
        :return:
        """

        def render_template(params: dict, template: str):
            for name, value in params.items():
                name = '${' + name + '}'
                template = template.replace(name, value)
            return template

        template_path = self.config_tmp_path
        with open(os.path.join(self.template_path, theme + '.json'), 'r') as theme:
            render_params = {
                **json.load(theme),
                'resultData': json.dumps(self.fields, ensure_ascii=False, indent=4)
            }

        override_path = os.path.abspath(self.report_dir) if \
            os.path.abspath(self.report_dir).endswith('/') else \
            os.path.abspath(self.report_dir) + '/'

        with open(template_path, 'rb') as file:
            body = file.read().decode('utf-8')
        with open(override_path + self.filename, 'w', encoding='utf-8', newline='\n') as write_file:
            html = render_template(render_params, body)
            write_file.write(html)

    @staticmethod
    def img2base(img_path: str, file_name: str) -> str:
        """
            接受传递进函数的filename 并找到文件转换为base64格式
        :param img_path: 通过文件名及默认路径找到的img绝对路径
        :param file_name: 用户在装饰器中传递进来的问价匿名
        :return:
        """
        pattern = '/' if platform != 'Windows' else '\\'

        with open(img_path + pattern + file_name, 'rb') as file:
            data = file.read()
        return base64.b64encode(data).decode()

    def add_test_img(*pargs):
        """
            接受若干个图片元素, 并展示在测试报告中
        :param pargs:
        :return:
        """

        def _wrap(func):
            @wraps(func)
            def __wrap(*args, **kwargs):
                img_path = os.path.abspath('{}'.format(BeautifulReport.img_path))
                try:
                    result = func(*args, **kwargs)
                except Exception:
                    if 'save_img' in dir(args[0]):
                        save_img = getattr(args[0], 'save_img')
                        save_img(func.__name__)
                        data = BeautifulReport.img2base(img_path, pargs[0] + '.png')
                        print(HTML_IMG_TEMPLATE.format(data, data))
                    sys.exit(0)
                print('<br></br>')

                if len(pargs) > 1:
                    for parg in pargs:
                        print(parg + ':')
                        data = BeautifulReport.img2base(img_path, parg + '.png')
                        print(HTML_IMG_TEMPLATE.format(data, data))
                    return result
                if not os.path.exists(img_path + pargs[0] + '.png'):
                    return result
                data = BeautifulReport.img2base(img_path, pargs[0] + '.png')
                print(HTML_IMG_TEMPLATE.format(data, data))
                return result

            return __wrap

        return _wrap
