package dbx

import (
	"fmt"

	"github.com/go-jet/jet/v2/mysql"
)

// ExprValues converts a list of values to a list of Expression values using
// function f to transform the values (mysql.String for strings, mysql.Uint64, etc).
func ExprValues[T any](values []T, f func(T) Expression) []Expression {
	expressions := make([]Expression, len(values))
	for i, v := range values {
		expressions[i] = f(v)
	}
	return expressions
}

// ExprStringers converts a list of fmt.Stringers to a list of Expression values.
func ExprStringers(values []fmt.Stringer) []Expression {
	expressions := make([]Expression, len(values))
	for i, v := range values {
		expressions[i] = mysql.String(v.String())
	}
	return expressions
}

// StringKSUIDExpr returns a Jet expression for a string-encoded KSUID column.
func StringKSUIDExpr(id StringKSUID) Expression {
	if id.IsNil() {
		return mysql.StringExp(mysql.NULL)
	}
	return mysql.String(id.String())
}

// BinaryKSUIDExpr returns a Jet expression for a binary-encoded KSUID column.
func BinaryKSUIDExpr(id BinaryKSUID) Expression {
	if id.IsNil() {
		return mysql.StringExp(mysql.NULL)
	}
	return mysql.String(string(id.Bytes()))
}