// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
import { Data } from '../data';
import { Field } from '../schema';
import { Column } from '../column';
import { Vector } from '../vector';
import { DataType } from '../type';
import { Chunked } from '../vector/chunked';
const isArray = Array.isArray;
/** @ignore */
export const selectArgs = (Ctor, vals) => _selectArgs(Ctor, vals, [], 0);
/** @ignore */
export const selectColumnArgs = (args) => {
    const [fields, values] = _selectFieldArgs(args, [[], []]);
    return values.map((x, i) => x instanceof Column ? Column.new(x.field.clone(fields[i]), x) :
        x instanceof Vector ? Column.new(fields[i], x) :
            Column.new(fields[i], []));
};
/** @ignore */
export const selectFieldArgs = (args) => _selectFieldArgs(args, [[], []]);
/** @ignore */
export const selectChunkArgs = (Ctor, vals) => _selectChunkArgs(Ctor, vals, [], 0);
/** @ignore */
export const selectVectorChildrenArgs = (Ctor, vals) => _selectVectorChildrenArgs(Ctor, vals, [], 0);
/** @ignore */
export const selectColumnChildrenArgs = (Ctor, vals) => _selectColumnChildrenArgs(Ctor, vals, [], 0);
/** @ignore */
function _selectArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (isArray(value = vals[i])) {
            j = _selectArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof Ctor) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
function _selectChunkArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (isArray(value = vals[i])) {
            j = _selectChunkArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof Chunked) {
            j = _selectChunkArgs(Ctor, value.chunks, res, j).length;
        }
        else if (value instanceof Ctor) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
function _selectVectorChildrenArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (isArray(value = vals[i])) {
            j = _selectVectorChildrenArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof Ctor) {
            j = _selectArgs(Vector, value.schema.fields.map((_, i) => value.getChildAt(i)), res, j).length;
        }
        else if (value instanceof Vector) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
function _selectColumnChildrenArgs(Ctor, vals, res, idx) {
    let value, j = idx;
    let i = -1, n = vals.length;
    while (++i < n) {
        if (isArray(value = vals[i])) {
            j = _selectColumnChildrenArgs(Ctor, value, res, j).length;
        }
        else if (value instanceof Ctor) {
            j = _selectArgs(Column, value.schema.fields.map((f, i) => Column.new(f, value.getChildAt(i))), res, j).length;
        }
        else if (value instanceof Column) {
            res[j++] = value;
        }
    }
    return res;
}
/** @ignore */
const toKeysAndValues = (xs, [k, v], i) => (xs[0][i] = k, xs[1][i] = v, xs);
/** @ignore */
function _selectFieldArgs(vals, ret) {
    let keys, n;
    switch (n = vals.length) {
        case 0: return ret;
        case 1:
            keys = ret[0];
            if (!(vals[0])) {
                return ret;
            }
            if (isArray(vals[0])) {
                return _selectFieldArgs(vals[0], ret);
            }
            if (!(vals[0] instanceof Data || vals[0] instanceof Vector || vals[0] instanceof DataType)) {
                [keys, vals] = Object.entries(vals[0]).reduce(toKeysAndValues, ret);
            }
            break;
        default:
            !isArray(keys = vals[n - 1])
                ? (vals = isArray(vals[0]) ? vals[0] : vals, keys = [])
                : (vals = isArray(vals[0]) ? vals[0] : vals.slice(0, n - 1));
    }
    let fieldIndex = -1;
    let valueIndex = -1;
    let idx = -1, len = vals.length;
    let field;
    let val;
    let [fields, values] = ret;
    while (++idx < len) {
        val = vals[idx];
        if (val instanceof Column && (values[++valueIndex] = val)) {
            fields[++fieldIndex] = val.field.clone(keys[idx], val.type, true);
        }
        else {
            ({ [idx]: field = idx } = keys);
            if (val instanceof DataType && (values[++valueIndex] = val)) {
                fields[++fieldIndex] = Field.new(field, val, true);
            }
            else if (val && val.type && (values[++valueIndex] = val)) {
                val instanceof Data && (values[valueIndex] = val = Vector.new(val));
                fields[++fieldIndex] = Field.new(field, val.type, true);
            }
        }
    }
    return ret;
}

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