package core

import (
	"git.akyoto.dev/cli/q/src/build/arch/x64"
	"git.akyoto.dev/cli/q/src/build/asm"
	"git.akyoto.dev/cli/q/src/build/cpu"
	"git.akyoto.dev/cli/q/src/build/fs"
	"git.akyoto.dev/cli/q/src/build/token"
)

// Function represents the smallest unit of code.
type Function struct {
	Name string
	File *fs.File
	Body token.List
	State
}

// NewFunction creates a new function.
func NewFunction(name string, file *fs.File, body token.List) *Function {
	return &Function{
		Name: name,
		File: file,
		Body: body,
		State: State{
			Assembler: asm.Assembler{
				Instructions: make([]asm.Instruction, 0, 32),
			},
			cpu: cpu.CPU{
				All:     x64.AllRegisters,
				Input:   x64.CallRegisters,
				General: x64.GeneralRegisters,
				Syscall: x64.SyscallRegisters,
				Output:  x64.ReturnValueRegisters,
			},
			scopes: []*Scope{
				{variables: map[string]*Variable{}},
			},
			finished: make(chan struct{}),
		},
	}
}

// String returns the function name.
func (f *Function) String() string {
	return f.Name
}

// Wait will block until the compilation finishes.
func (f *Function) Wait() {
	<-f.finished
}