package handlers

import (
	"Yimaru-Backend/internal/domain"

	"github.com/gofiber/fiber/v2"
)

func (h *Handler) canManageLMSPractices(c *fiber.Ctx) bool {
	rn := string(c.Locals("role").(domain.Role))
	return h.rbacSvc.HasPermission(rn, "practices.create") || h.rbacSvc.HasPermission(rn, "practices.update")
}

func (h *Handler) canManageLessons(c *fiber.Ctx) bool {
	rn := string(c.Locals("role").(domain.Role))
	return h.rbacSvc.HasPermission(rn, "lessons.create") || h.rbacSvc.HasPermission(rn, "lessons.update")
}

func (h *Handler) canManageExamPrepPractices(c *fiber.Ctx) bool {
	rn := string(c.Locals("role").(domain.Role))
	return h.rbacSvc.HasPermission(rn, "exam_prep.practices.create") || h.rbacSvc.HasPermission(rn, "exam_prep.practices.update")
}

// forbidIfLinkedPracticeDraftForSubscriber returns 404 for draft LMS/exam-prep shells when the caller cannot manage content.
func (h *Handler) forbidIfLinkedPracticeDraftForSubscriber(c *fiber.Ctx, questionSetID int64) error {
	if lp, ok, err := h.practiceSvc.TryGetByQuestionSetID(c.Context(), questionSetID); err != nil {
		return err
	} else if ok && !lp.VisibleToLearners() && !h.canManageLMSPractices(c) {
		return fiber.NewError(fiber.StatusNotFound, "Practice not found")
	}

	if ep, ok, err := h.examPrepSvc.TryGetExamPrepPracticeByQuestionSetID(c.Context(), questionSetID); err != nil {
		return err
	} else if ok && !ep.VisibleToLearners() && !h.canManageExamPrepPractices(c) {
		return fiber.NewError(fiber.StatusNotFound, "Practice not found")
	}

	return nil
}

// forbidCompletingDraftPractice blocks completion when an LMS/exam-prep shell is still in draft (learners/students path).
func (h *Handler) forbidCompletingDraftPractice(c *fiber.Ctx, questionSetID int64) error {
	if lp, ok, err := h.practiceSvc.TryGetByQuestionSetID(c.Context(), questionSetID); err != nil {
		return err
	} else if ok && !lp.VisibleToLearners() {
		return fiber.NewError(fiber.StatusForbidden, "Only published practices can be completed")
	}

	if ep, ok, err := h.examPrepSvc.TryGetExamPrepPracticeByQuestionSetID(c.Context(), questionSetID); err != nil {
		return err
	} else if ok && !ep.VisibleToLearners() {
		return fiber.NewError(fiber.StatusForbidden, "Only published practices can be completed")
	}

	return nil
}