<?php
namespace ProVM\Alias\Database\Query;

use ProVM\Alias\Database\Query;
use ProVM\Concept\Database\Query\Insert as InsertInterface;
use ProVM\Concept\Database\Query\Select;

abstract class Insert extends Query implements InsertInterface
{
    public function into(string $table): InsertInterface
    {
        return $this->setTable($table);
    }
    public function columns(array $columns): InsertInterface
    {
        return $this->setColumns($columns);
    }
    public function values(array $values): InsertInterface
    {
        return $this->setValues($values);
    }
    public function select(Select $select): InsertInterface
    {
        return $this->setSelect($select);
    }

    protected string $table;
    public function setTable(string $table): InsertInterface
    {
        $this->table = $table;
        return $this;
    }
    public function getTable(): string
    {
        return $this->table;
    }
    protected array $columns;
    public function setColumns(array $columns): InsertInterface
    {
        foreach ($columns as $column) {
            $this->addColumn($column);
        }
        return $this;
    }
    public function addColumn(string $column): InsertInterface
    {
        $this->columns []= $column;
        return $this;
    }
    public function getColumns(): array
    {
        return $this->columns;
    }
    public function getColumnString(): string
    {
        return implode(', ', $this->getColumns());
    }
    protected array $values;
    public function setValues(array $values): InsertInterface
    {
        foreach ($values as $value) {
            $this->addValue($value);
        }
        return $this;
    }
    public function addValue(int|string $value): InsertInterface
    {
        if (!is_numeric($value)) {
            $value = "'{$value}'";
        }
        $this->values []= $value;
        return $this;
    }
    public function getValues(): array
    {
        return $this->values;
    }
    public function getValueString(): string
    {
        return implode(', ', $this->getValues());
    }
    protected Select $select;
    public function setSelect(Select $select): InsertInterface
    {
        $this->select = $select;
        return $this;
    }
    public function getSelect(): Select
    {
        return $this->select;
    }

    public function build(): string
    {
        $query = ["INSERT INTO"];
        $query []= $this->getTable();
        if (isset($this->columns)) {
            $query []= "({$this->getColumnString()})";
        }
        if (isset($this->select)) {
            $query []= "{$this->getSelect()}";
            return implode(' ', $query);
        }
        $query []= 'VALUES';
        $query []= "({$this->getValueString()})";
        return implode(' ', $query);
    }
}