#!/usr/bin/env node

var fs = require('fs');
var util = require('util');
var chalk = require('nomnom/node_modules/chalk');

var HkStockHoldings = require('..');

var today = new Date();
today.setHours(0, 0, 0);

var argv = require("nomnom")
  .script(require('../package.json').name)
  .option('code', {
    position: 0,
    help: "Stock code(s) for analysis",
    type: "string",
    list: true,
    required: true
  })
  .option('id', {
    abbr: 'i',
    help: "Filter participant by id"
  })
  .option('name', {
    abbr: 'n',
    help: "Filter participant by name"
  })
  .option('time', {
    abbr: 't',
    type: "string",
    required: true,
    default: '1d',
    help: "Period for analysis, e.g.: '1d', '2w', '3m', '1y'"
  })
  .option('startDate', {
    abbr: 's',
    help: "Start date of period"
  })
  .option('endDate', {
    abbr: 'e',
    required: true,
    default: today.toISODateString(),
    help: "End date of period"
  })
  .option('json', {
    abbr: 'j',
    flag: true,
    default: false,
    help: "Dump result as JSON"
  })
  .option('dumpBody', {
    abbr: 'B',
    flag: true,
    default: false,
    help: "Print request body"
  })
  .option('verbose', {
    abbr: 'v',
    flag: true,
    default: false,
    help: "Print processing logs"
  })
  .help(chalk.bold("Author: ") +
    chalk.underline("leesei@gmail.com") + "       "+
    chalk.bold("Licence: ") + "MIT\n")
  .parse();

function parsePeriod(argv) {
  var ret = {};
  var found = argv.time.match(/(\d+)([dwmy])/i);
  if (!found) {
    return null;
  }

  ret.endDate = new Date(argv.endDate);
  if (argv.startDate) {
    ret.startDate = new Date(argv.startDate);
  }
  else {
    // set startDate using time string
    // console.log(found);
    var modifier;
    switch (found[2]) {
    case 'd':
      modifier = 1;
      break;
    case 'w':
      modifier = 7;
      break;
    case 'm':
      modifier = 30;
      break;
    case 'y':
      modifier = 360;
      break;
    }
    ret.startDate =
      ret.endDate.getPrevDay(found[1]*modifier-1);
  }

  delete argv.startDate;
  delete argv.endDate;
  delete argv.time;
  return ret;
}

// console.log(argv);
var timePeriod = parsePeriod(argv);
if (!timePeriod) {
  console.error('Invalid time specified');
  process.exit(-1);
}

var opts = util._extend({}, argv);
opts.timePeriod = timePeriod;
if (argv.verbose) {
  console.log(opts);
}

// callback function, parameters depends on scraper
callback = function (err, results) {
  if (err) {
    console.error("scrape error:", err);
    return;
  }

  if (argv.json) {
    var f = fs.openSync(results.code+'.json', 'w');
    fs.writeSync(f, JSON.stringify(results, null, 2));
    return;
  }

  results.series.map(function (record, i) {
    console.info("=======  [%d] %s (%s) =======", i, record.name, record.id);
    results.period.map(function (date, index) {
      console.info("%s: %d shares (%d%%)", date,
        record.shares[index], record.percent[index]);
    });
    console.info("   Average: %d shares (%d%%)", record.sharesAvg, record.percentAvg);
    console.info();
  });
};

var stockHoldings = HkStockHoldings(opts, callback);