const fs = require('fs');
const generatePdf = require('./pdf-generator');
const generateHtml = require('./html-generator');

function getExamples(data, scopeAuth, apiRoute) {
  const examples = {
    success: [],
    exceptions: []
  };

  data.forEach(function(item) {
    const method = item.originalRequest.method;
    const headers = [];
    const auth = [];
    const variables = [];
    const queryes = [];
    item.originalRequest.header.forEach(headeritem => {
      const header_obj = {
        key: headeritem.key,
        value: headeritem.value
      };
      headers.push(header_obj);
    });

    if(item.originalRequest.auth) {
      const auth_type = item.originalRequest.auth.type;
      item.originalRequest.auth[auth_type].forEach(authitem=> {
        const auth_obj = {
          key: authitem.key,
          value: authitem.value,
          type: authitem.type
        };
        auth.push(auth_obj);
      });
    }
    else {
      if (scopeAuth !== null) {
        const auth_type = scopeAuth.type;
        scopeAuth[auth_type].forEach(authitem=> {
          const auth_obj = {
            key: authitem.key,
            value: authitem.value,
            type: authitem.type
          };
          req_auth.push(auth_obj);
        });
      }
    }

    let body = "";
    let mode = "";
    let options = "";
    if(item.originalRequest.body) {
      body = item.originalRequest.body[item.originalRequest.body.mode];
      mode = item.originalRequest.body.mode;
      if (item.originalRequest.body.options) {
        options = item.originalRequest.body.options[item.originalRequest.body.mode];
      }
    }

    const url = item.originalRequest.url.raw.replace("{{api_url}}", apiRoute);
    if (item.originalRequest.url.variable) {
      item.originalRequest.url.variable.forEach(item=> {
        variables.push(item);
      });
    }
    if (item.originalRequest.url.query) {
      item.originalRequest.url.query.forEach(item=> {
        queryes.push(item);
      });
    }

    const result = {
      name: item.name,
      request: {
        header: headers,
        auth: auth,
        method: method,
        body: body,
        bodyMode: mode,
        bodyOptions: options, 
        url: url,
        variables: variables,
        queryes: queryes,
        desc: item.originalRequest.description || ""
      },
      response: {
        status: item.status,
        code: item.code,
        language: item._postman_previewlanguage,
        headers: item.header,
        cookies: item.cookie,
        body: item.body
      }
    };
    if (item.code === 200) {
      examples.success.push(result);
    }
    else {
      examples.exceptions.push(result);
    }
  });
  return examples;
}

function parseData(data, scopeAuth, apiRoute) {
  const req_name = data.name;
  const req_method = data.request.method;
  const req_headers = [];
  const req_auth = [];
  const variables = [];
  const queryes = [];
  
  let examples;
  if (data.response && data.response.length > 0) {
    examples = getExamples(data.response, scopeAuth, apiRoute);
  }

  data.request.header.forEach(headeritem => {
    const header_obj = {
      key: headeritem.key,
      value: headeritem.value
    };
    if (header_obj.key !== 'Authorization') {
      req_headers.push(header_obj);
    }
  });

  if(data.request.auth) {
    const auth_type = data.request.auth.type;
    data.request.auth[auth_type].forEach(authitem=> {
      const auth_obj = {
        key: authitem.key,
        value: authitem.value,
        type: authitem.type
      };
      req_auth.push(auth_obj);
    });
  }
  else {
    if (scopeAuth !== null) {
      const auth_type = scopeAuth.type;
      scopeAuth[auth_type].forEach(authitem=> {
        const auth_obj = {
          key: authitem.key,
          value: authitem.value,
          type: authitem.type
        };
        req_auth.push(auth_obj);
      });
    }
  }

  let req_body = "";
  let req_mode = "";
  let req_options = "";
  if(data.request.body) {
    req_body = data.request.body[data.request.body.mode];
    req_mode = data.request.body.mode;
    if (data.request.body.options) {
      req_options = data.request.body.options[data.request.body.mode];
    }
  }

  const reqUrl = data.request.url.raw.replace("{{api_url}}", apiRoute);
  if (reqUrl.includes('public')) {
    req_headers.push({key: 'Authorization (optional)', value: 'Bearer |token|'});
  }
  if (reqUrl.includes('user')) {
    req_headers.push({key: 'Authorization (required)', value: 'Bearer |token|'});
  }
  if (reqUrl.includes('admin')) {
    req_headers.push({key: 'Authorization (required)', value: 'Bearer |token|'});
  }

  if (data.request.url.variable) {
    data.request.url.variable.forEach(item=> {
      variables.push(item);
    });
  }
  if (data.request.url.query) {
    data.request.url.query.forEach(item=> {
      queryes.push(item);
    });
  }

  return {
    name: req_name,
    header: req_headers,
    auth: req_auth,
    method: req_method,
    body: req_body,
    bodyMode: req_mode,
    bodyOptions: req_options, 
    url: reqUrl,
    variables: variables,
    queryes: queryes,
    desc: data.request.description || "",
    examples: examples || {success: [],exceptions: []}
  };
}

module.exports = function filereader(filepath, outputPath, apiRoute) {
  fs.readFile(filepath, 'utf-8', (err, data) => {
    if(err) {
      console.log(err);
    }
    const jsonData = JSON.parse(data);
    const collection_name = jsonData.info.name;
    const resultData = {};
    jsonData.item.forEach(scope => {
      if(scope.item) {
        let auth = null;
        if (scope.auth && scope.auth.length > 0) {
          auth = scope.auth;
        }
        resultData[scope.name] = {};
        scope.item.forEach(subscope => {
          if(subscope.item) {
            resultData[scope.name][subscope.name] = {};
            resultData[scope.name][subscope.name].apis = [];
            subscope.item.forEach(reqitem => {
              resultData[scope.name][subscope.name].apis.push(parseData(reqitem, auth, apiRoute));
            });
          }
          else {
            if(!resultData[scope.name].apis) {
              resultData[scope.name].apis = [];
            }
            resultData[scope.name].apis.push(parseData(subscope, auth, apiRoute));
          }
        });
      }                                                       
    });
		
    generatePdf(generateHtml(collection_name, resultData, outputPath),`${collection_name}.pdf`, outputPath);
  });
};