document.write("<script language=javascript src='../scripts/idvalidator/gb2260.js'></script>");

function idvalidator() {
	var param = {
		error : {
			longnumber : '长数字存在精度问题，请使用字符串传值！ long number is not allowed, because the precision of the number in javascript.'
		}
	};
	var util = {
		checkarg : function(id) {
			var argtype = (typeof id);

			switch (argtype) {
			case 'number':
				// long number not allowed
				id = id.tostring();
				if (id.length > 15) {
					this.error(param.error.longnumber);
					return false;
				}
				break;
			case 'string':
				break;
			default:
				return false;
			}
			id = id.touppercase();
			var code = null;
			if (id.length === 18) {
				// 18位
				code = {
					body : id.slice(0, 17),
					checkbit : id.slice(-1),
					type : 18
				};
			} else if (id.length === 15) {
				// 15位
				code = {
					body : id,
					type : 15
				};
			} else {
				return false;
			}
			return code;
		}
		// 地址码检查
		,
		checkaddr : function(addr, gb2260) {
			var addrinfo = this.getaddrinfo(addr, gb2260);
			return (addrinfo === false ? false : true);
		}
		// 取得地址码信息
		,
		getaddrinfo : function(addr, gb2260) {
			gb2260 = gb2260 || null;
			// 查询gb/t2260,没有引入gb2260时略过
			if (gb2260 === null) {
				return addr;
			}
			if (!gb2260.hasownproperty(addr)) {
				// 考虑标准不全的情况，搜索不到时向上搜索
				var tmpaddr;
				tmpaddr = addr.slice(0, 4) + '00';
				if (!gb2260.hasownproperty(tmpaddr)) {
					tmpaddr = addr.slice(0, 2) + '0000';
					if (!gb2260.hasownproperty(tmpaddr)) {
						return false;
					} else {
						return gb2260[tmpaddr] + '未知地区';
					}
				} else {
					return gb2260[tmpaddr] + '未知地区';
				}
			} else {
				return gb2260[addr];
			}
		}
		// 生日码检查
		,
		checkbirth : function(birth) {
			var year, month, day;
			if (birth.length == 8) {
				year = parseint(birth.slice(0, 4), 10);
				month = parseint(birth.slice(4, 6), 10);
				day = parseint(birth.slice(-2), 10);
			} else if (birth.length == 6) {
				year = parseint('19' + birth.slice(0, 2), 10);
				month = parseint(birth.slice(2, 4), 10);
				day = parseint(birth.slice(-2), 10);
			} else {
				return false;
			}
			// todo 是否需要判断年份
			/*
			 * if( year<1800 ){ return false; }
			 */
			// todo 按月份检测
			if (month > 12 || month === 0 || day > 31 || day === 0) {
				return false;
			}

			return true;
		}
		// 顺序码检查
		,
		checkorder : function(order) {
			// 暂无需检测

			return true;
		}
		// 加权
		,
		weight : function(t) {
			return math.pow(2, t - 1) % 11;
		}
		// 随机整数
		,
		rand : function(max, min) {
			min = min || 1;
			return math.round(math.random() * (max - min)) + min;
		}
		// 数字补位
		,
		str_pad : function(str, len, chr, right) {
			str = str.tostring();
			len = len || 2;
			chr = chr || '0';
			right = right || false;
			if (str.length >= len) {
				return str;
			} else {
				for (var i = 0, j = len - str.length; i < j; i++) {
					if (right) {
						str = str + chr;
					} else {
						str = chr + str;
					}
				}
				return str;
			}
		}
		// 抛错
		,
		error : function(msg) {
			var e = new error();
			e.message = 'idvalidator: ' + msg;
			throw e;
		}
	};
	var _idvalidator = function(gb2260) {
		if (typeof gb2260 !== "undefined") {
			this.gb2260 = gb2260;
		}
		// 建立cache
		this.cache = {};
	};
	_idvalidator.prototype = {
		isvalid : function(id) {
			var gb2260 = this.gb2260 || null;
			var code = util.checkarg(id);
			if (code === false) {
				return false;
			}
			// 查询cache
			if (this.cache.hasownproperty(id)
					&& typeof this.cache[id].valid !== 'undefined') {
				return this.cache[id].valid;
			} else {
				if (!this.cache.hasownproperty(id)) {
					this.cache[id] = {};
				}
			}

			var addr = code.body.slice(0, 6);
			var birth = (code.type === 18 ? code.body.slice(6, 14) : code.body
					.slice(6, 12));
			var order = code.body.slice(-3);

			if (!(util.checkaddr(addr, gb2260) && util.checkbirth(birth) && util
					.checkorder(order))) {
				this.cache[id].valid = false;
				return false;
			}

			// 15位不含校验码，到此已结束
			if (code.type === 15) {
				this.cache[id].valid = true;
				return true;
			}

			/* 校验位部分 */

			// 位置加权
			var posweight = [];
			for (var i = 18; i > 1; i--) {
				var wei = util.weight(i);
				posweight[i] = wei;
			}

			// 累加body部分与位置加权的积
			var bodysum = 0;
			var bodyarr = code.body.split('');
			for (var j = 0; j < bodyarr.length; j++) {
				bodysum += (parseint(bodyarr[j], 10) * posweight[18 - j]);
			}

			// 得出校验码
			var checkbit = 12 - (bodysum % 11);
			if (checkbit == 10) {
				checkbit = 'x';
			} else if (checkbit > 10) {
				checkbit = checkbit % 11;
			}
			checkbit = (typeof checkbit === 'number' ? checkbit.tostring()
					: checkbit);

			// 检查校验码
			if (checkbit !== code.checkbit) {
				this.cache[id].valid = false;
				return false;
			} else {
				this.cache[id].valid = true;
				return true;
			}

		}

		// 分析详细信息
		,
		getinfo : function(id) {
			var gb2260 = this.gb2260 || null;
			// 号码必须有效
			if (this.isvalid(id) === false) {
				return false;
			}
			// todo 复用此部分
			var code = util.checkarg(id);

			// 查询cache
			// 到此时通过isvalid已经有了cache记录
			if (typeof this.cache[id].info !== 'undefined') {
				return this.cache[id].info;
			}

			var addr = code.body.slice(0, 6);
			var birth = (code.type === 18 ? code.body.slice(6, 14) : code.body
					.slice(6, 12));
			var order = code.body.slice(-3);

			var info = {};
			info.addrcode = addr;
			if (gb2260 !== null) {
				info.addr = util.getaddrinfo(addr, gb2260);
			}
			info.birth = (code.type === 18 ? (([ birth.slice(0, 4),
					birth.slice(4, 6), birth.slice(-2) ]).join('-')) : ([
					'19' + birth.slice(0, 2), birth.slice(2, 4),
					birth.slice(-2) ]).join('-'));
			info.sex = (order % 2 === 0 ? 0 : 1);
			info.length = code.type;
			if (code.type === 18) {
				info.checkbit = code.checkbit;
			}

			// 记录cache
			this.cache[id].info = info;

			return info;
		}

		// 仿造一个号
		,
		makeid : function(isfifteen) {
			var gb2260 = this.gb2260 || null;

			// 地址码
			var addr = null;
			if (gb2260 !== null) {
				var loopcnt = 0;
				while (addr === null) {
					// 防止死循环
					if (loopcnt > 10) {
						addr = 110101;
						break;
					}
					var prov = util.str_pad(util.rand(50), 2, '0');
					var city = util.str_pad(util.rand(20), 2, '0');
					var area = util.str_pad(util.rand(20), 2, '0');
					var addrtest = [ prov, city, area ].join('');
					if (gb2260[addrtest]) {
						addr = addrtest;
						break;
					}
				}
			} else {
				addr = 110101;
			}

			// 出生年
			var yr = util.str_pad(util.rand(99, 50), 2, '0');
			var mo = util.str_pad(util.rand(12, 1), 2, '0');
			var da = util.str_pad(util.rand(28, 1), 2, '0');
			if (isfifteen) {
				return addr + yr + mo + da
						+ util.str_pad(util.rand(999, 1), 3, '1');
			}

			yr = '19' + yr;
			var body = addr + yr + mo + da
					+ util.str_pad(util.rand(999, 1), 3, '1');

			// 位置加权
			var posweight = [];
			for (var i = 18; i > 1; i--) {
				var wei = util.weight(i);
				posweight[i] = wei;
			}

			// 累加body部分与位置加权的积
			var bodysum = 0;
			var bodyarr = body.split('');
			for (var j = 0; j < bodyarr.length; j++) {
				bodysum += (parseint(bodyarr[j], 10) * posweight[18 - j]);
			}

			// 得出校验码
			var checkbit = 12 - (bodysum % 11);
			if (checkbit == 10) {
				checkbit = 'x';
			} else if (checkbit > 10) {
				checkbit = checkbit % 11;
			}
			checkbit = (typeof checkbit === 'number' ? checkbit.tostring()
					: checkbit);

			return (body + checkbit);
		}

	};// _idvalidator
	gb2260 = gb2260 == null ? "" : gb2260;
	return new _idvalidator(gb2260);
}