package build

import (
	"git.akyoto.dev/cli/q/src/build/expression"
	"git.akyoto.dev/cli/q/src/build/token"
)

// CompileFunctionCall compiles a top-level function call.
func (f *Function) CompileFunctionCall(expr *expression.Expression) error {
	funcName := expr.Children[0].Token.Text()
	parameters := expr.Children[1:]

	for i, parameter := range parameters {
		err := f.ExpressionToRegister(parameter, f.CPU.Syscall[i])

		if err != nil {
			return err
		}
	}

	if funcName == "syscall" {
		f.Assembler.Syscall()
	} else {
		f.Assembler.Call(funcName)
	}

	return nil
}

// isFunctionCall returns true if the expression is a function call.
func isFunctionCall(expr *expression.Expression) bool {
	return expr.Token.Kind == token.Operator && expr.Token.Text() == "λ"
}