const { isJson5, json_parse, handleJson, joinPath, safeArray } = require('./utils');
const constants = require('../client/constants/variable.js');
const _ = require('underscore');
const URL = require('url');
const utils = require('./power-string.js').utils;
const HTTP_METHOD = constants.HTTP_METHOD;
const axios = require('axios');
const qs = require('qs');

const isNode = typeof global == 'object' && global.global === global;
const ContentTypeMap = {
  'application/json': 'json',
  'application/xml': 'xml',
  other: 'text',
  'application/html': 'html'
};

async function httpRequestByNode(options) {
  function handleRes(response) {
    if (!response || typeof response !== 'object') {
      return {
        res: {
          status: 500,
          body: isNode
            ? '请求出错, 内网服务器自动化测试无法访问到，请检查是否为内网服务器！'
            : '请求出错'
        }
      };
    }
    return {
      res: {
        header: response.headers,
        status: response.status,
        body: response.data
      }
    };
  }

  function handleData() {
    let contentTypeItem;
    if (!options) return;
    if (typeof options.headers === 'object' && options.headers) {
      Object.keys(options.headers).forEach(key => {
        if (/content-type/i.test(key)) {
          if (options.headers[key]) {
            contentTypeItem = options.headers[key]
              .split(';')[0]
              .trim()
              .toLowerCase();
          }
        }
        if (!options.headers[key]) delete options.headers[key];
      });

      if (
        contentTypeItem === 'application/x-www-form-urlencoded' &&
        typeof options.data === 'object' &&
        options.data
      ) {
        options.data = qs.stringify(options.data);
      }
    }
  }

  try {
    handleData(options);
    let response = await axios({
      method: options.method,
      url: options.url,
      headers: options.headers,
      timeout: 5000,
      data: options.data
    });
    return handleRes(response);
  } catch (err) {
    if (err.response === undefined) {
      handleRes({
        headers: {},
        status: null,
        data: err.message
      });
    }
    return handleRes(err.response);
  }
}

function handleContentType(headers) {
  if (!headers || typeof headers !== 'object') return ContentTypeMap.other;
  let contentTypeItem = 'other';
  try {
    Object.keys(headers).forEach(key => {
      if (/content-type/i.test(key)) {
        contentTypeItem = headers[key]
          .split(';')[0]
          .trim()
          .toLowerCase();
      }
    });
    return ContentTypeMap[contentTypeItem] ? ContentTypeMap[contentTypeItem] : ContentTypeMap.other;
  } catch (err) {
    return ContentTypeMap.other;
  }
}

function checkRequestBodyIsRaw(method, reqBodyType) {
  if (
    reqBodyType &&
    reqBodyType !== 'file' &&
    reqBodyType !== 'form' &&
    HTTP_METHOD[method].request_body
  ) {
    return reqBodyType;
  }
  return false;
}

function checkNameIsExistInArray(name, arr) {
  let isRepeat = false;
  for (let i = 0; i < arr.length; i++) {
    let item = arr[i];
    if (item.name === name) {
      isRepeat = true;
      break;
    }
  }
  return isRepeat;
}

function handleCurrDomain(domains, case_env) {
  let currDomain = _.find(domains, item => item.name === case_env);
  
  if (!currDomain) {
    currDomain = domains[0];
  }
  return currDomain;
}

function sandboxByNode(sandbox = {}, script) {
  const vm = require('vm');
  script = new vm.Script(script);
  const context = new vm.createContext(sandbox);
  script.runInContext(context, {
    timeout: 3000
  });
  return sandbox;
}

async function sandbox(context = {}, script) {
  if (isNode) {
    try {
      context.context = context;
      context.console = console;
      context.Promise = Promise;
      context.setTimeout = setTimeout;
      context = sandboxByNode(context, script);
    } catch (err) {
      err.message = `Script: ${script}
      message: ${err.message}`;
      throw err;
    }
  } else {
    context = sandboxByBrowser(context, script);
  }
  if (context.promise && typeof context.promise === 'object' && context.promise.then) {
    try {
      await context.promise;
    } catch (err) {
      err.message = `Script: ${script}
      message: ${err.message}`;
      throw err;
    }
  }
  return context;
}

function sandboxByBrowser(context = {}, script) {
  if (!script || typeof script !== 'string') {
    return context;
  }
  let beginScript = '';
  for (var i in context) {
    beginScript += `var ${i} = context.${i};`;
  }
  try {
    eval(beginScript + script);
  } catch (err) {
    let message = `Script:
                   ----CodeBegin----:
                   ${beginScript}
                   ${script}
                   ----CodeEnd----
                  `;
    err.message = `Script: ${message}
    message: ${err.message}`;
    
    throw err;
  }
  return context;
}

async function crossRequest(defaultOptions, preScript, afterScript) {
  let options = Object.assign({}, defaultOptions);
  let urlObj = URL.parse(options.url, true),
    query = {};
  query = Object.assign(query, urlObj.query);
  let context = {
    get href() {
      return urlObj.href;
    },
    set href(val){
      throw new Error('context.href 不能被赋值')
    },
    get hostname() {
      return urlObj.hostname;
    },
    set hostname(val){
      throw new Error('context.hostname 不能被赋值')
    },

    get caseId() {
      return options.caseId;
    },

    set caseId(val){
      throw new Error('context.caseId 不能被赋值')
    },

    method: options.method,
    pathname: urlObj.pathname,
    query: query,
    requestHeader: options.headers || {},
    requestBody: options.data,
    promise: false
  };

  context.utils = Object.freeze({
    _: _,
    base64: utils.base64,
    md5: utils.md5,
    sha1: utils.sha1,
    sha224: utils.sha224,
    sha256: utils.sha256,
    sha384: utils.sha384,
    sha512: utils.sha512,
    unbase64: utils.unbase64,
    axios: axios
  })

  if (preScript) {
    context = await sandbox(context, preScript);
    defaultOptions.url = options.url = URL.format({
      protocol: urlObj.protocol,
      host: urlObj.host,
      query: context.query,
      pathname: context.pathname
    });
    defaultOptions.headers = options.headers = context.requestHeader;
    defaultOptions.data = options.data = context.requestBody;
  }

  let data;

  if (isNode) {
    data = await httpRequestByNode(options);
    data.req = options;
  } else {
    data = await new Promise((resolve, reject) => {
      options.error = options.success = function(res, header, data) {
        let message = '';
        if (res && typeof res === 'string') {
          res = json_parse(data.res.body);
          data.res.body = res;
        }
        if (!isNode) message = '请求异常，请检查 chrome network 错误信息...';
        if (isNaN(data.res.status)) {
          reject({
            body: res || message,
            header,
            message
          });
        }
        resolve(data);
      };
      window.crossRequest(options);
    });
  }

  if (afterScript) {
    context.responseData = data.res.body;
    context.responseHeader = data.res.header;
    context.responseStatus = data.res.status;
    context.runTime = data.runTime;
    context = await sandbox(context, afterScript);
    data.res.body = context.responseData;
    data.res.header = context.responseHeader;
    data.res.status = context.responseStatus;
    data.runTime = context.runTime;
  }
  return data;
}

function handleParams(interfaceData, handleValue, requestParams) {
  function paramsToObjectWithEnable(arr) {
    const obj = {};
    safeArray(arr).forEach(item => {
      if (item && item.name && (item.enable || item.required === '1')) {
        obj[item.name] = handleValue(item.value);
        if (requestParams) {
          requestParams[item.name] = obj[item.name];
        }
      }
    });
    return obj;
  }

  function paramsToObjectUnWithEnable(arr) {
    const obj = {};
    safeArray(arr).forEach(item => {
      if (item && item.name) {
        obj[item.name] = handleValue(item.value);
        if (requestParams) {
          requestParams[item.name] = obj[item.name];
        }
      }
    });
    return obj;
  }

  let { case_env, path, env, _id } = interfaceData;
  let currDomain,
    requestBody,
    requestOptions = {};

  interfaceData.req_params = interfaceData.req_params || [];
  interfaceData.req_params.forEach(item => {
    let val = handleValue(item.value);
    if (requestParams) {
      requestParams[item.name] = val;
    }
    path = path.replace(`:${item.name}`, val || `:${item.name}`);
    path = path.replace(`{${item.name}}`, val || `{${item.name}}`);
  });

  currDomain = handleCurrDomain(env, case_env);
  const urlObj = URL.parse(joinPath(currDomain.domain, path), true);
  const url = URL.format({
    protocol: urlObj.protocol || 'http',
    host: urlObj.host,
    pathname: urlObj.pathname,
    query: Object.assign(urlObj.query, paramsToObjectWithEnable(interfaceData.req_query))
  });


  requestOptions = {
    url,
    caseId: _id,
    method: interfaceData.method,
    headers: paramsToObjectUnWithEnable(interfaceData.req_headers),
    timeout: 82400000
  };

  if (HTTP_METHOD[interfaceData.method].request_body) {
    if (interfaceData.req_body_type === 'form') {
      requestBody = paramsToObjectWithEnable(
        safeArray(interfaceData.req_body_form).filter(item => {
          return item.type == 'text';
        })
      );
    } else if (interfaceData.req_body_type === 'json') {
      let reqBody = isJson5(interfaceData.req_body_other);
      if (reqBody === false) {
        requestBody = interfaceData.req_body_other;
      } else {
        if (requestParams) {
          requestParams = Object.assign(requestParams, reqBody);
        }
        requestBody = handleJson(reqBody, handleValue);
      }
    } else {
      requestBody = interfaceData.req_body_other;
    }
    requestOptions.data = requestBody;
    if (interfaceData.req_body_type === 'form') {
      requestOptions.files = paramsToObjectWithEnable(
        safeArray(interfaceData.req_body_form).filter(item => {
          return item.type == 'file';
        })
      );
    } else if (interfaceData.req_body_type === 'file') {
      requestOptions.file = 'single-file';
    }
  }

  return requestOptions;
}

exports.checkRequestBodyIsRaw = checkRequestBodyIsRaw;
exports.handleParams = handleParams;
exports.handleContentType = handleContentType;
exports.crossRequest = crossRequest;
exports.handleCurrDomain = handleCurrDomain;
exports.checkNameIsExistInArray = checkNameIsExistInArray;