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

use ProVM\Alias\Database\Query;
use ProVM\Concept\Database\Query\Update as UpdateInterface;

abstract class Update extends Query implements UpdateInterface
{
    public function table(string $table): UpdateInterface
    {
        return $this->setTable($table);
    }
    public function set(array $value_pairs): UpdateInterface
    {
        return $this->setValues($value_pairs);
    }
    public function where(array $conditions): UpdateInterface
    {
        return $this->setConditions($conditions);
    }

    protected string $table;
    public function setTable(string $table): UpdateInterface
    {
        $this->table = $table;
        return $this;
    }
    public function getTable(): string
    {
        return $this->table;
    }
    protected array $values;
    public function setValues(array $values): UpdateInterface
    {
        foreach ($values as $value) {
            $column = $value['column'] ?? $value[0];
            $val = $value['value'] ?? $value[1];
            $this->addValue($column, $val);
        }
        return $this;
    }
    public function addValue(string $column, int|string $value): UpdateInterface
    {
        if (!is_numeric($value)) {
            $value = "'{$value}'";
        }
        $this->values []= "`{$column}` = {$value}";
        return $this;
    }
    public function getValues(): array
    {
        return $this->values;
    }
    public function getValueString(): string
    {
        return implode(', ', $this->getValues());
    }
    protected array $conditions;
    public function setConditions(array $conditions): UpdateInterface
    {
        foreach ($conditions as $condition) {
            $this->addCondition($condition);
        }
        return $this;
    }
    public function addCondition(string $expression): UpdateInterface
    {
        $this->conditions []= $expression;
        return $this;
    }
    public function getConditions(): array
    {
        return $this->conditions;
    }
    public function getConditionString(): string
    {
        return implode(' ', $this->getConditions());
    }

    public function build(): string
    {
        return implode(' ', [
            'UPDATE',
            $this->getTable(),
            'SET',
            $this->getValueString(),
            'WHERE',
            $this->getConditionString()
        ]);
    }
}