var KeyCombo = require('./key-combo');


function Locale(name) {
  this.localeName     = name;
  this.pressedKeys    = [];
  this._appliedMacros = [];
  this._keyMap        = {};
  this._killKeyCodes  = [];
  this._macros        = [];
}

Locale.prototype.bindKeyCode = function(keyCode, keyNames) {
  if (typeof keyNames === 'string') {
    keyNames = [keyNames];
  }

  this._keyMap[keyCode] = keyNames;
};

Locale.prototype.bindMacro = function(keyComboStr, keyNames) {
  if (typeof keyNames === 'string') {
    keyNames = [ keyNames ];
  }

  var handler = null;
  if (typeof keyNames === 'function') {
    handler = keyNames;
    keyNames = null;
  }

  var macro = {
    keyCombo : new KeyCombo(keyComboStr),
    keyNames : keyNames,
    handler  : handler
  };

  this._macros.push(macro);
};

Locale.prototype.getKeyCodes = function(keyName) {
  var keyCodes = [];
  for (var keyCode in this._keyMap) {
    var index = this._keyMap[keyCode].indexOf(keyName);
    if (index > -1) { keyCodes.push(keyCode|0); }
  }
  return keyCodes;
};

Locale.prototype.getKeyNames = function(keyCode) {
  return this._keyMap[keyCode] || [];
};

Locale.prototype.setKillKey = function(keyCode) {
  if (typeof keyCode === 'string') {
    var keyCodes = this.getKeyCodes(keyCode);
    for (var i = 0; i < keyCodes.length; i += 1) {
      this.setKillKey(keyCodes[i]);
    }
    return;
  }

  this._killKeyCodes.push(keyCode);
};

Locale.prototype.pressKey = function(keyCode) {
  if (typeof keyCode === 'string') {
    var keyCodes = this.getKeyCodes(keyCode);
    for (var i = 0; i < keyCodes.length; i += 1) {
      this.pressKey(keyCodes[i]);
    }
    return;
  }

  var keyNames = this.getKeyNames(keyCode);
  for (var i = 0; i < keyNames.length; i += 1) {
    if (this.pressedKeys.indexOf(keyNames[i]) === -1) {
      this.pressedKeys.push(keyNames[i]);
    }
  }

  this._applyMacros();
};

Locale.prototype.releaseKey = function(keyCode) {
  if (typeof keyCode === 'string') {
    var keyCodes = this.getKeyCodes(keyCode);
    for (var i = 0; i < keyCodes.length; i += 1) {
      this.releaseKey(keyCodes[i]);
    }
  }

  else {
    var keyNames         = this.getKeyNames(keyCode);
    var killKeyCodeIndex = this._killKeyCodes.indexOf(keyCode);
    
    if (killKeyCodeIndex > -1) {
      this.pressedKeys.length = 0;
    } else {
      for (var i = 0; i < keyNames.length; i += 1) {
        var index = this.pressedKeys.indexOf(keyNames[i]);
        if (index > -1) {
          this.pressedKeys.splice(index, 1);
        }
      }
    }

    this._clearMacros();
  }
};

Locale.prototype._applyMacros = function() {
  var macros = this._macros.slice(0);
  for (var i = 0; i < macros.length; i += 1) {
    var macro = macros[i];
    if (macro.keyCombo.check(this.pressedKeys)) {
      if (macro.handler) {
        macro.keyNames = macro.handler(this.pressedKeys);
      }
      for (var j = 0; j < macro.keyNames.length; j += 1) {
        if (this.pressedKeys.indexOf(macro.keyNames[j]) === -1) {
          this.pressedKeys.push(macro.keyNames[j]);
        }
      }
      this._appliedMacros.push(macro);
    }
  }
};

Locale.prototype._clearMacros = function() {
  for (var i = 0; i < this._appliedMacros.length; i += 1) {
    var macro = this._appliedMacros[i];
    if (!macro.keyCombo.check(this.pressedKeys)) {
      for (var j = 0; j < macro.keyNames.length; j += 1) {
        var index = this.pressedKeys.indexOf(macro.keyNames[j]);
        if (index > -1) {
          this.pressedKeys.splice(index, 1);
        }
      }
      if (macro.handler) {
        macro.keyNames = null;
      }
      this._appliedMacros.splice(i, 1);
      i -= 1;
    }
  }
};


module.exports = Locale;