package controllers

import (
	"encoding/json"
	"fmt"
	"net/http"
	"strconv"
	"time"

	"learnsteam/cslms-api/internal/models"
	"learnsteam/cslms-api/internal/services"

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
	"gorm.io/datatypes"
)

type QuizController interface {
	List(*gin.Context)
	Find(*gin.Context)
	Create(*gin.Context)
	Update(*gin.Context)
	Delete(*gin.Context)
}

type quizController struct {
	service services.QuizService
}

func NewQuizController(service services.QuizService) QuizController {
	return &quizController{
		service: service,
	}
}

// Quiz List
//
// @Summary     퀴즈 목록 가져오기
// @Description 퀴즈 목록을 가져옵니다.
// @Tags        퀴즈
//
// @Accept json
// @Produce json
//
// @Security Bearer
//
// @Param quiz_paper_id query string true "퀴즈페이퍼 ID"
// @Param q query string false "검색어"
// @Param page query int false "페이지"
// @Param limit query int false "페이지 사이즈"
//
// @Success 200 {object} models.QuizListResponse
// @Router /quiz [get]
func (controller *quizController) List(c *gin.Context) {
	quiz_paper_id, err := strconv.ParseInt(c.DefaultQuery("quiz_paper_id", ""), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	page, err := strconv.Atoi(c.DefaultQuery("page", "1"))
	if err != nil {
		fmt.Println("error : page")
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	limit, err := strconv.Atoi(c.DefaultQuery("limit", "10"))
	if err != nil {
		fmt.Println("error : limit")
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	result, err := controller.service.List(quiz_paper_id, page, limit)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	totalNumber, err := controller.service.Total(quiz_paper_id)
	if err != nil {
		fmt.Println("error : list")
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	totalPage := int64(totalNumber/int64(limit) + 1)

	c.JSON(http.StatusOK, gin.H{"data": result, "total": totalNumber, "page": page, "totalPage": totalPage, "pageSize": limit})
}

// Get Quiz
//
// @Summary 퀴즈 가져오기
// @Description ID로 퀴즈를 가져옵니다.
// @Tags    퀴즈
//
// @Accept json
// @Produce json
//
// @Security Bearer
//
// @Param id path string true "퀴즈 ID"
//
// @Success 200 {object} models.QuizResponse
// @Router /quiz/{id} [get]
func (controller *quizController) Find(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	result, err := controller.service.Find(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, result)
}

// Create Quiz
//
// @Summary 퀴즈 생성
// @Description 퀴즈를 만듭니다.
// @Tags    퀴즈
//
// @Accept json
// @Produce json
//
// @Security Bearer
//
// @Param quizBody body models.QuizRequest true "Quiz Body"
//
// @Success 200 {object} models.QuizResponse
// @Router /quiz [post]
func (controller *quizController) Create(c *gin.Context) {
	var request models.QuizRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	var content datatypes.JSON
	content, err := json.Marshal(request.Content)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	var answer datatypes.JSON
	answer, err = json.Marshal(request.Answer)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	quiz := &models.Quiz{
		GUID:         uuid.NewString(),
		CenterID:     request.CenterID,
		QuizPaperID:  request.QuizPaperID,
		No:           request.No,
		QuestionType: request.QuestionType,
		Question:     request.Question,
		Content:      content,
		Answer:       answer,
		UpdatedAt:    time.Now(),
		CreatedAt:    time.Now(),
	}

	result, err := controller.service.Create(quiz)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, result)
}

// Update Quiz
//
// @Summary 퀴즈 수정
// @Description 퀴즈를 수정합니다.
// @Tags    퀴즈
//
// @Accept json
// @Produce json
//
// @Security Bearer
//
// @Param id path int64 true "Quiz ID"
// @Param quizBody body models.QuizRequest true "Quiz Body"
//
// @Success 200 {object} models.QuizResponse
// @Router /quiz/{id} [put]
func (controller *quizController) Update(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	var request models.QuizRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	quiz, err := controller.service.Find(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	var content datatypes.JSON
	content, err = json.Marshal(request.Content)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	var answer datatypes.JSON
	answer, err = json.Marshal(request.Answer)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	quiz.QuizPaperID = request.QuizPaperID
	quiz.No = request.No
	quiz.QuestionType = request.QuestionType
	quiz.Question = request.Question
	quiz.Content = content
	quiz.Answer = answer
	quiz.UpdatedAt = time.Now()

	result, err := controller.service.Update(quiz)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, result)
}

// Delete Quiz
//
// @Summary 퀴즈 삭제
// @Description 퀴즈를 삭제합니다.
// @Tags    퀴즈
//
// @Accept json
// @Produce json
//
// @Security Bearer
//
// @Param id path int64 true "Quiz ID"
//
// @Router /quiz/{id} [delete]
func (controller *quizController) Delete(c *gin.Context) {
	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	_, err = controller.service.Find(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	err = controller.service.Delete(id)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "success"})
}