(function(){

function openEffortEntry(taskId, cb) {
  getFrame('Submit').location.href = '/usr/submit/Effort.asp?cmd=submit&tid=' + taskId;
  setTimeout(cb, 1000);
}

function fillEffort(taskId, date, log, cb) {
  openEffortEntry(taskId, function() {
    var DRDate = toDRDate(date);
    var docAll = getFrame('Submit').document.all;
    var startEl = docAll.Start;
    startEl.previousElementSibling.checked = true;
    docAll.End.value = DRDate;
    startEl.value = DRDate;
    docAll.W1004.value = log.hours;
    docAll.A1004.value = log.desc;
    cb();
  });
}

function submitEffort(taskId, date, log, cb) {
  fillEffort(taskId, date, log, function() {
    getFrame('Submit').document.all.SubmitForm.submit();
    setTimeout(cb, 1000);
  });
}

function submitNextEffort(dateEntries) {
  var first = dateEntries[0];
  if (first) {
    var log = first.entries.shift();
    var next = function() {
      submitNextEffort(dateEntries);
    };
    if (log) {
      submitEffort(getTaskId(), first.date, log, next);
    } else {
      dateEntries.shift();
      next();
    }
  } else {
    console.log('finished');
  }
}

function getLogEntries(log, options) {
  if (options.groupIssues) {
    return [{
      desc: reduceLogDesc(log, options.showParent),
      hours: reduceLogHours(log)
    }];
  } else {
    return log.map(function(entry) {
      return {
        desc: getLogEntryIssue(entry, options.showParent),
        hours: entry.hours
      }
    });
  }
}

function displayTimesheet(data, options) {
  var html = '<label title="Group by date"><input type=checkbox name=group> Group</label> \u00A0 <label title="Show story instead of a sub-task"><input type=checkbox name=parent>Show parent</label>';
  html += '<table border=1 style="margin:0 auto 10px auto">';
  html += '<tr><th><input type=checkbox name=toggleAll checked></th><th>Date</th><th>Tasks</th><th>Hours</th></tr>';
  var dates = Object.keys(data);
  dates.sort();
  var allEntries = dates.map(function(date) {
    return {
      date: date,
      entries: getLogEntries(data[date], options)
    };
  });
  allEntries.forEach(function(dateEntries) {
    var date = dateEntries.date;
    dateEntries.entries.forEach(function(entry, i) {
      html += '<tr><td><input type=checkbox checked data-date="' + date + '" data-entrynum=' + i + '></td><td>' + toDRDate(date) + '</td><td>' +
              entry.desc + '</td><td>' + entry.hours + '</td></tr>\n';
    });
  });
  html += '</table><span class="dr_close" style="text-decoration:underline;margin-right:10px">close</span><input type="button" value=Submit>';
  var doc = getFrame('Submit').document;
  var body = doc.body;
  var timeSheetCt = doc.createElement('div');
  timeSheetCt.style.margin = '0 0 20px';
  timeSheetCt.style.textAlign = 'center';
  timeSheetCt.innerHTML = html;
  // toggle checkboxes
  var toggleCheckbox = timeSheetCt.querySelector('th input[name=toggleAll]');
  var groupCheckbox  = timeSheetCt.querySelector('input[name=group]');
  var parentCheckbox = timeSheetCt.querySelector('input[name=parent]');
  toggleCheckbox.onchange = function() {
    toArr(timeSheetCt.querySelectorAll('td input')).forEach(function(node) {
      node.checked = toggleCheckbox.checked;
    });
  };
  function close() {
    timeSheetCt.parentNode.removeChild(timeSheetCt);
  }
  function syncOptions(node, key) {
    node.checked = options[key];
    node.onchange = function() {
      options[key] = node.checked;
      close();
      displayTimesheet(data, options);
    };
  }
  syncOptions(groupCheckbox, 'groupIssues');
  syncOptions(parentCheckbox, 'showParent');

  // remove button
  timeSheetCt.querySelector('.dr_close').onclick = close;
  // submit button
  timeSheetCt.querySelector('input[value="Submit"]').onclick = function() {
    var toRemove = {};
    toArr(timeSheetCt.querySelectorAll('input[data-date]:not(:checked)')).forEach(function(node) {
      var date = node.dataset.date;
      toRemove[date] = toRemove[date] || [];
      toRemove[date].push(node.dataset.entrynum);
    });
    allEntries.forEach(function(dateEntries) {
      var remove = toRemove[dateEntries.date];
      if (remove) {
        dateEntries.entries = dateEntries.entries.filter(function(entry, i) {
          return remove.indexOf('' + i) === -1;
        });
      }
    })
    submitNextEffort(allEntries);
  };
  body.insertBefore(timeSheetCt, body.firstChild);
}

var getFrame;
var getTaskId;
function main(global) {
  var frames = {};

  (function getFrames(window) {
    toArr(window.frames).forEach(function(win) {
      if (win.name) {
        frames[win.name] = win;
      }
      getFrames(win);
    });
  })(global);

  getFrame = function(name) {
    return frames[name];
  };

  var DRTaskId = localStorage.DRTaskId;
  var pageTaskId = getFrame('Submit').location.href.match(/Effort\.asp\?cmd=submit&tid=(\d+)/);
  pageTaskId = pageTaskId && pageTaskId[1];

  if (DRTaskId && pageTaskId && DRTaskId !== pageTaskId) {
    alert('Task id mismatch, using ' + pageTaskId);
    DRTaskId = pageTaskId;
  } else if (!DRTaskId) {
    if (pageTaskId) {
      DRTaskId = pageTaskId;
    } else {
      DRTaskId = prompt('Enter DR task id');
    }
    if (!DRTaskId) {
      alert('failed');
      return;
    }
  }
  localStorage.DRTaskId = DRTaskId;

  getTaskId = function() {
    return DRTaskId;
  };

  var data = prompt('Paste data from JIRA timesheet');
  if (data) {
    try {
      displayTimesheet(JSON.parse(data), {
        groupIssues: false,
        showParent: true
      });
    } catch(e) {
      console.error(e);
    }
  }
}

function toArr(obj) {
  return Array.prototype.slice.call(obj);
}

function toDRDate(date) {
  return date.slice(0, 2) + '.' + date.slice(2, 4) + '.' + date.slice(4);
}

function reduceLogHours(log) {
  return log.reduce(function(total, log) {
    return total + log.hours;
  }, 0);
}

function reduceLogDesc(log, parent) {
  return log.reduce(function(desc, log) {
    return (desc ? desc + ' ' : '') + getLogEntryIssue(log, parent);
  }, '');
}

function getLogEntryIssue(entry, parent) {
  return parent && entry.parentIssue || entry.issueId;
}

main(this);

})();