<?php

namespace Ulmus\Repository;

use Ulmus\{Common\EntityResolver, Query, Common};

trait QueryBuildingTrait
{
    public function truncate(? string $table = null, ? string $alias = null, ? string $schema = null) : self
    {
        $schema = $schema ?: $this->entityResolver->schemaName();

        $this->queryBuilder->truncate($this->escapeTable($table ?: $this->entityResolver->tableName()), $this->escapeIdentifier($alias ?: $this->alias), $this->escapedDatabase(), $schema ? $this->escapeSchema($schema) : null);

        return $this;
    }

    public function select(array|string|\Stringable $fields, bool $distinct = false) : self
    {
        $this->queryBuilder->select($fields, $distinct);

        return $this;
    }

    public function distinct(array|string|\Stringable $fields) : self
    {
        $this->queryBuilder->select($fields);
        $this->queryBuilder->getFragment(Query\Select::class)->distinct = true;

        return $this;
    }

    public function insert(array $fieldlist, string $table, string $alias, ? string $schema, bool $replace = false) : self
    {
        $this->queryBuilder->insert($fieldlist, $this->escapeTable($table), $this->escapeIdentifier($alias), $this->escapedDatabase(), $schema, $replace);

        return $this;
    }

    public function values(array $dataset) : self
    {
        $this->queryBuilder->values($dataset);
        return $this;
    }

    public function update(string $table, string $alias, ? string $schema) : self
    {
        $this->queryBuilder->update($this->escapeTable($table), $alias ? $this->escapeIdentifier($alias) : null, $this->escapedDatabase(), $schema);

        return $this;
    }

    public function set(array $dataset) : self
    {
        $keys = array_keys($dataset);
        $escapedFields = array_combine($keys, array_map([ $this, 'escapeField' ], $keys));

        $this->queryBuilder->set($dataset, $escapedFields);

        return $this;
    }

    public function delete(...$args) : self
    {
        $this->queryBuilder->delete();

        return $this;
    }

    public function from(string $table, ? string $alias, ? string $schema) : self
    {
        $this->queryBuilder->from($this->escapeTable($table), $alias ? $this->escapeIdentifier($alias) : null, $this->escapedDatabase(), $schema ? $this->escapeSchema($schema) : null);

        return $this;
    }

    public function join(string $type, $table, string|\Stringable $field, mixed $value, ? string $alias = null, ? callable $callback = null) : self
    {
        $join = $this->queryBuilder->withJoin($type, $this->escapeTable($table), $field, $value, false, $alias ? $this->escapeIdentifier($alias) : null);

        if ( $callback ) {
            $callback($join);
        }

        return $this;
    }

    public function outerJoin(string $type, $table, string|\Stringable $field, mixed $value, ? string $alias = null, ? callable $callback = null) : self
    {
        $join = $this->queryBuilder->withJoin($type, $this->escapeTable($table), $field, $value, true, $alias ? $this->escapeIdentifier($alias) : null);

        if ( $callback ) {
            $callback($join);
        }

        return $this;
    }

    public function match() : self
    {

    }

    public function notMatch() : self
    {

    }

    public function between() : self
    {

    }

    public function notBetween() : self
    {

    }

    public function groupBy(string|\Stringable $field) : self
    {
        $this->queryBuilder->groupBy($field);

        return $this;
    }

    public function groups(array $groups) : self
    {
        foreach($groups as $field ) {
            $this->groupBy($field);
        }

        return $this;
    }

    public function orderBy(string|\Stringable $field, null|string|\Stringable $direction = null) : self
    {
        $this->queryBuilder->orderBy($field, $direction);

        return $this;
    }

    # @UNTESTED
    public function randomizeOrder() : self
    {
        $this->queryBuilder->orderBy(Common\Sql::function('RAND', Common\Sql::identifier('CURDATE()+0')));

        return $this;
    }

    public function orders(array $orderList) : self
    {
        foreach($orderList as $field => $direction) {
            if (is_numeric($field)) {
                $this->orderBy($direction);
            }
            else {
                # Associative array with direction
                $this->orderBy($field, $direction);
            }
        }

        return $this;
    }

    public function limit(int $value) : self
    {
        $this->queryBuilder->limit($value);

        return $this;
    }

    public function offset(int $value) : self
    {
        $this->queryBuilder->offset($value);

        return $this;
    }

    public function getSqlQuery(bool $flush = true) : string
    {
        $result = $this->queryBuilder->render();

        $flush and $this->queryBuilder->reset();

        return $result;
    }


    public function resetQuery() : self
    {
        $this->queryBuilder->reset();

        return $this;
    }

    protected function insertSqlQuery(array $dataset, bool $replace = false) : self
    {
        if ( null === $insert = $this->queryBuilder->getFragment(Query\Insert::class) ) {
            $this->insert(array_map([ $this, 'escapeField' ] , array_keys($dataset)), $this->entityResolver->tableName(), $this->alias, $this->entityResolver->schemaName(), $replace);
        }
        else {
            $insert->replace = $replace;
        }

        $this->values($dataset);

        return $this;
    }

    protected function updateSqlQuery(array $dataset) : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Update::class) ) {
            $this->update($this->entityResolver->tableName(), $this->alias, $this->entityResolver->schemaName());
        }

        $this->set($dataset);

        return $this;
    }

    protected function selectSqlQuery() : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Select::class) ) {
            $fields = $this->entityResolver->fieldList(EntityResolver::KEY_COLUMN_NAME, true);
            $this->select($this->entityClass::fields(array_map(fn($f) => $f->object->name ?? $f->name, $fields)));
        }

        if ( null === $this->queryBuilder->getFragment(Query\From::class) ) {
            $this->from($this->entityResolver->tableName(), $this->alias, $this->entityResolver->schemaName());
        }

        return $this;
    }

    protected function deleteSqlQuery() : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Delete::class) ) {
            $this->delete();
        }

        if ( null === $this->queryBuilder->getFragment(Query\From::class) ) {
            $this->from($this->entityResolver->tableName(), null, $this->entityResolver->schemaName());
        }

        return $this;
    }

    public function createSqlQuery() : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Create::class) ) {
            $this->queryBuilder->create($this->adapter->adapter(), $this->escapeFieldList($this->entityResolver->fieldList(EntityResolver::KEY_ENTITY_NAME, true)), $this->escapeTable($this->entityResolver->tableName()), $this->entityResolver->schemaName());
        }

        return $this;
    }

    public function alterSqlQuery(array $fields) : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Alter::class) ) {
            $this->queryBuilder->alter($this->adapter->adapter(), $fields, $this->escapeTable($this->entityResolver->tableName()), $this->entityResolver->schemaName());
        }

        return $this;
    }

    public function showDatabasesSqlQuery() : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Show::class) ) {
            $this->queryBuilder->showDatabases();
        }

        return $this;
    }

    public function showTablesSqlQuery() : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Show::class) ) {
            $this->queryBuilder->showTables();
        }

        return $this;
    }

    public function showColumnsSqlQuery(string $table) : self
    {
        if ( null === $this->queryBuilder->getFragment(Query\Show::class) ) {
            $this->queryBuilder->showColumns($table);
        }

        return $this;
    }
}