package handler

import (
	"exam_registration/internal/model"
	"exam_registration/internal/service"
	"exam_registration/pkg/response"
	"github.com/gin-gonic/gin"
	"strconv"
)

type ExamHandler struct {
	examService *service.ExamService
}

func NewExamHandler() *ExamHandler {
	return &ExamHandler{
		examService: &service.ExamService{},
	}
}

// CreateExam 创建考试
func (h *ExamHandler) CreateExam(c *gin.Context) {
	var exam model.Exam
	if err := c.ShouldBindJSON(&exam); err != nil {
		response.Error(c, response.BAD_REQUEST, "参数错误")
		return
	}

	userID, _ := c.Get("user_id")
	exam.CreatorID = userID.(uint64)

	if err := h.examService.CreateExam(&exam); err != nil {
		response.Error(c, response.ERROR, err.Error())
		return
	}

	response.Success(c, exam)
}

// GetExamByID 获取考试详情
func (h *ExamHandler) GetExamByID(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)

	exam, err := h.examService.GetExamByID(id)
	if err != nil {
		response.Error(c, response.ERROR, err.Error())
		return
	}

	response.Success(c, exam)
}

// GetExamList 获取考试列表
func (h *ExamHandler) GetExamList(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))

	exams, total, err := h.examService.GetExamList(page, pageSize)
	if err != nil {
		response.Error(c, response.ERROR, err.Error())
		return
	}

	response.Success(c, gin.H{
		"list":     exams,
		"total":    total,
		"page":     page,
		"pageSize": pageSize,
	})
}

// UpdateExam 更新考试
func (h *ExamHandler) UpdateExam(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)

	var updates map[string]interface{}
	if err := c.ShouldBindJSON(&updates); err != nil {
		response.Error(c, response.BAD_REQUEST, "参数错误")
		return
	}

	if err := h.examService.UpdateExam(id, updates); err != nil {
		response.Error(c, response.ERROR, err.Error())
		return
	}

	response.Success(c, nil)
}

// DeleteExam 删除考试
func (h *ExamHandler) DeleteExam(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)

	if err := h.examService.DeleteExam(id); err != nil {
		response.Error(c, response.ERROR, err.Error())
		return
	}

	response.Success(c, nil)
}