package sqlite

import (
	"source.gleipnir.technology/Gleipnir/jet/v2/internal/jet"
)

// CAST function converts an expr (of any type) into later specified datatype.
func CAST(expr Expression) *cast {
	return &cast{
		expr: expr,
	}
}

type cast struct {
	expr Expression
}

// AS casts expressions to castType
func (c *cast) AS(castType string) Expression {
	return jet.AtomicCustomExpression(Token("CAST("), c.expr, Token("AS "+castType+")"))
}

// AS_TEXT cast expression to TEXT type
func (c *cast) AS_TEXT() StringExpression {
	return StringExp(c.AS("TEXT"))
}

// AS_NUMERIC cast expression to NUMERIC type
func (c *cast) AS_NUMERIC() FloatExpression {
	return FloatExp(c.AS("NUMERIC"))
}

// AS_INTEGER cast expression to INTEGER type
func (c *cast) AS_INTEGER() IntegerExpression {
	return IntExp(c.AS("INTEGER"))
}

// AS_REAL cast expression to REAL type
func (c *cast) AS_REAL() FloatExpression {
	return FloatExp(c.AS("REAL"))
}

// AS_BLOB cast expression to BLOB type
func (c *cast) AS_BLOB() BlobExpression {
	return BlobExp(c.AS("BLOB"))
}