"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
function omit(row, fields) {
    var data = tslib_1.__assign({}, row);
    fields.forEach(function (field) {
        delete data[field];
    });
    return data;
}
/**
 * 展开数组字段
 * @param rows - 数据
 * @param options - 配置
 */
function flatten(rows, options) {
    var fields = options.fields, _a = options.as, as = _a === void 0 ? [] : _a, index = options.index;
    var targets = rows.map(function (row) { return fields.map(function (field) { return row[field]; }); });
    //  [
    //    [[1,2,3], [2,3,4]]
    //  ]
    var newRows = rows.map(function (row) { return omit(row, fields); });
    var keys = fields.map(function (item, index) { return as[index] || item; });
    var result = [];
    var idx = 1;
    targets.forEach(function (items, rowIndex) {
        // [[1,2,3], [2,3,4]]
        var max = Math.max.apply(Math, tslib_1.__spread(items.map(function (item) { return item.length; })));
        var _loop_1 = function (i) {
            var row = tslib_1.__assign({}, newRows[rowIndex]);
            keys.forEach(function (key, j) {
                var item = items[j];
                var length = item.length;
                row[key] = i >= length ? null : item[i];
                if (index)
                    row[index] = idx + i;
            });
            result.push(row);
        };
        for (var i = 0; i < max; i++) {
            _loop_1(i);
        }
        idx += max;
    });
    return result;
}
exports.flatten = flatten;