package handler

import (
	"github.com/gin-gonic/gin"

	"with_you/internal/pkg/response"
	"with_you/internal/repository"
	"with_you/internal/service"
)

type EmptyClassroomHandler struct {
	classroomSyncService service.EmptyClassroomSyncService
	classroomRepo        repository.EmptyClassroomRepository
}

func NewEmptyClassroomHandler(
	classroomSyncService service.EmptyClassroomSyncService,
	classroomRepo repository.EmptyClassroomRepository,
) *EmptyClassroomHandler {
	return &EmptyClassroomHandler{
		classroomSyncService: classroomSyncService,
		classroomRepo:        classroomRepo,
	}
}

type syncEmptyClassroomsRequest struct {
	Username   string `json:"username" binding:"required"`
	Password   string `json:"password" binding:"required"`
	Semester   string `json:"semester"`
	WeekStart  string `json:"week_start"`
	WeekEnd    string `json:"week_end"`
	CampusCode string `json:"campus_code"`
}

func (h *EmptyClassroomHandler) SyncEmptyClassrooms(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		response.Unauthorized(c, "")
		return
	}

	var req syncEmptyClassroomsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "invalid request: "+err.Error())
		return
	}

	result, err := h.classroomSyncService.SyncUserEmptyClassrooms(c.Request.Context(), userID, &service.SyncEmptyClassroomsRequest{
		Username:   req.Username,
		Password:   req.Password,
		Semester:   req.Semester,
		WeekStart:  req.WeekStart,
		WeekEnd:    req.WeekEnd,
		CampusCode: req.CampusCode,
	})
	if err != nil {
		response.HandleError(c, err, "failed to sync empty classrooms")
		return
	}

	if !result.Success {
		response.Success(c, result)
		return
	}
	response.SuccessWithMessage(c, result.Message, result)
}

func (h *EmptyClassroomHandler) ListEmptyClassrooms(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		response.Unauthorized(c, "")
		return
	}
	semester := c.Query("semester")
	if semester == "" {
		response.BadRequest(c, "semester is required")
		return
	}

	classrooms, err := h.classroomRepo.ListByUserAndSemester(userID, semester)
	if err != nil {
		response.HandleError(c, err, "failed to list empty classrooms")
		return
	}

	response.Success(c, gin.H{"classrooms": classrooms})
}