package sync

import (
	"fmt"
	"plugin"

	"srs.epita.fr/fic-server/libfic"
)

var hooks = &CheckHooks{}

type CheckFlagChoiceHook func(*fic.FlagChoice) []error
type CheckFlagKeyHook func(*fic.FlagKey, string) []error
type CheckFlagKeyWithChoicesHook func(*fic.FlagKey, string, []*fic.FlagChoice) []error
type CheckFlagLabelHook func(*fic.FlagLabel) []error
type CheckFlagMCQHook func(*fic.MCQ, []*fic.MCQ_entry) []error
type CheckFileHook func(*fic.EFile) []error
type CheckHintHook func(*fic.EHint) []error

type CheckHooks struct {
	flagChoiceHooks         []CheckFlagChoiceHook
	flagKeyHooks            []CheckFlagKeyHook
	flagKeyWithChoicesHooks []CheckFlagKeyWithChoicesHook
	flagLabelHooks          []CheckFlagLabelHook
	flagMCQHooks            []CheckFlagMCQHook
	fileHooks               []CheckFileHook
	hintHooks               []CheckHintHook
}

func (h *CheckHooks) RegisterFlagChoiceHook(f CheckFlagChoiceHook) {
	h.flagChoiceHooks = append(h.flagChoiceHooks, f)
}

func (h *CheckHooks) RegisterFlagKeyHook(f CheckFlagKeyHook) {
	h.flagKeyHooks = append(h.flagKeyHooks, f)
}

func (h *CheckHooks) RegisterFlagKeyWithChoicesHook(f CheckFlagKeyWithChoicesHook) {
	h.flagKeyWithChoicesHooks = append(h.flagKeyWithChoicesHooks, f)
}

func (h *CheckHooks) RegisterFlagLabelHook(f CheckFlagLabelHook) {
	h.flagLabelHooks = append(h.flagLabelHooks, f)
}

func (h *CheckHooks) RegisterFlagMCQHook(f CheckFlagMCQHook) {
	h.flagMCQHooks = append(h.flagMCQHooks, f)
}

func (h *CheckHooks) RegisterFileHook(f CheckFileHook) {
	h.fileHooks = append(h.fileHooks, f)
}

func (h *CheckHooks) RegisterHintHook(f CheckHintHook) {
	h.hintHooks = append(h.hintHooks, f)
}

func LoadChecksPlugin(fname string) error {
	p, err := plugin.Open(fname)
	if err != nil {
		return err
	}

	register, err := p.Lookup("RegisterChecksHooks")
	if err != nil {
		return err
	}

	register.(func(*CheckHooks))(hooks)

	return nil
}

type CheckPluginList []string

func (l *CheckPluginList) String() string {
	return fmt.Sprintf("%v", *l)
}

func (l *CheckPluginList) Set(value string) error {
	*l = append(*l, value)
	return nil
}