# All files / csv2json/bin csvtojson.js

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     function csvtojson() {
      var Converter = require("../libs/core/Converter.js");
      var fs = require("fs");
      var options = require("./options.json");
      var cmds = options.commands;
      var opts = options.options;
      var exps = options.examples;
      var pkg = require("../package.json");
      /**
       *{
        "cmd": "parse", command to run
        "options": {}, options to passe to the command
        "inputStream": process.stdin // input stream for the command. default is stdin. can be a file read stream.
      };
       *
       */
      var parsedCmd;

      function _showHelp(errno) {
        var key;
        errno = typeof errno === "number" ? errno : 0;
        console.log("csvtojson: Convert csv to JSON format");
        console.log("version:", pkg.version);
        console.log("Usage: csvtojson [<command>] [<options>] filepath\n");
        console.log("Commands: ");
        for (key in cmds) {
          if (cmds.hasOwnProperty(key)) {
            console.log("\t%s: %s", key, cmds[key]);
          }
        }
        console.log("Options: ");
        for (key in opts) {
          if (opts.hasOwnProperty(key)) {
            console.log("\t%s: %s", key, opts[key].desc);
          }
        }
        console.log("Examples: ");
        for (var i = 0; i < exps.length; i++) {
          console.log("\t%s", exps[i]);
        }
        process.exit(errno);
      }

      function parse() {
        var is = parsedCmd.inputStream;
        parsedCmd.options.constructResult = false;
        if (parsedCmd.options.toArrayString === undefined) {
          parsedCmd.options.toArrayString = true;
        }
        if (parsedCmd.options.maxRowLength === undefined) {
          parsedCmd.options.maxRowLength = 10240;
        }
        if (is === process.stdin && is.isTTY) {
          console.log("Please specify csv file path or pipe the csv data through.\n");
          _showHelp(1);
        }
        if (parsedCmd.options.delimiter === "\\t" ){
          parsedCmd.options.delimiter="\t";
        }
        var conv = new Converter(parsedCmd.options);
        conv.on("error", function (err, pos) {
          if (!parsedCmd.options.quiet) {
            console.error("csvtojson got an error: ", err);
            if (pos) {
              console.error("The error happens at following line: ");
              console.log(pos);
            }
          }
          process.exit(1);
        });
        is.pipe(conv).pipe(process.stdout);
        // is.pipe(conv);
      }

      function run(cmd, options) {
        if (cmd === "parse") {
          parse();
        } else if (cmd === "version") {
          console.log(pkg.version);
        } else {
          console.log("unknown command %s.", cmd);
          _showHelp(1);
        }
      }

      function commandParser() {
        var parsedCmd = {
          "cmd": "parse",
          "options": {},
          "inputStream": process.stdin
        };

        function parseObject(val, optional) {
          try {
            return JSON.parse(val);
          } catch (e) {
            if (optional) {
              return val;
            } else {
              console.error(e);
              process.exit(1);
            }
          }
        }

        function parseBool(str, optName) {
          str = str.toLowerCase();
          if (str === "true" || str === "y") {
            return true;
          } else if (str === "false" || str === "n") {
            return false;
          }
          console.log("Unknown boolean value %s for parameter %s.", str, optName);
          _showHelp(1);
        }
        process.argv.slice(2).forEach(function (item) {
          if (item.indexOf("--") > -1) {
            var itemArr = item.split("=");
            var optName = itemArr[0];
            var key, val, type;
            if (!opts[optName]) {
              console.log("Option %s not supported.", optName);
              _showHelp(1);
            }
            key = optName.replace('--', '');
            val = itemArr[1] || '';
            type = opts[optName].type;
            if (type === "string") {
              parsedCmd.options[key] = val.toString();
            } else if (type === "boolean") {
              parsedCmd.options[key] = parseBool(val, optName);
            } else if (type === "number") {
              parsedCmd.options[key] = parseFloat(val);
            } else if (type === "object") {
              parsedCmd.options[key] = parseObject(val, false);
            } else if (type === "~object") {
              parsedCmd.options[key] = parseObject(val, true);
            } else {
              throw ({
                name: "UnimplementedException",
                message: "Option type parsing not implemented. See bin/options.json"
              });
            }
          } else if (cmds[item]) {
            parsedCmd.cmd = item;
          } else if (fs.existsSync(item)) {
            parsedCmd.inputStream = fs.createReadStream(item);
          } else {
            console.log("unknown parameter %s.", item);
          }
        });
        return parsedCmd;
      }
      process.stdin.setEncoding('utf8');
      parsedCmd = commandParser();
      run(parsedCmd.cmd, parsedCmd.options);
    }
    module.exports = csvtojson;
    if (!module.parent) {
      csvtojson();
    }