package handler

import (
	"net/http"

	"github.com/gin-gonic/gin"

	"github.com/user-management-system/internal/service"
)

// CaptchaHandler handles captcha requests
type CaptchaHandler struct {
	captchaService *service.CaptchaService
}

// NewCaptchaHandler creates a new CaptchaHandler
func NewCaptchaHandler(captchaService *service.CaptchaService) *CaptchaHandler {
	return &CaptchaHandler{captchaService: captchaService}
}

// GenerateCaptcha 生成验证码
// @Summary 生成验证码
// @Description 生成图形验证码
// @Tags 验证码
// @Produce json
// @Success 200 {object} Response{data=CaptchaResponse} "验证码信息"
// @Router /api/v1/captcha/generate [get]
func (h *CaptchaHandler) GenerateCaptcha(c *gin.Context) {
	result, err := h.captchaService.Generate(c.Request.Context())
	if err != nil {
		handleError(c, err)
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code":    0,
		"message": "success",
		"data": gin.H{
			"captcha_id": result.CaptchaID,
			"image":      result.ImageData,
		},
	})
}

// GetCaptchaImage 获取验证码图片
// @Summary 获取验证码图片
// @Description 根据captcha_id获取验证码图片（当前未实现）
// @Tags 验证码
// @Produce json
// @Param captcha_id query string false "验证码ID"
// @Success 200 {object} Response "验证码图片"
// @Router /api/v1/captcha/image [get]
func (h *CaptchaHandler) GetCaptchaImage(c *gin.Context) {
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "success"})
}

// VerifyCaptcha 验证验证码
// @Summary 验证验证码
// @Description 验证用户输入的验证码是否正确
// @Tags 验证码
// @Accept json
// @Produce json
// @Param request body VerifyCaptchaRequest true "验证码信息"
// @Success 200 {object} Response{data=VerifyResponse} "验证成功"
// @Failure 400 {object} Response "验证码无效"
// @Router /api/v1/captcha/verify [post]
func (h *CaptchaHandler) VerifyCaptcha(c *gin.Context) {
	var req struct {
		CaptchaID string `json:"captcha_id" binding:"required"`
		Answer    string `json:"answer" binding:"required"`
	}

	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": err.Error()})
		return
	}

	if h.captchaService.Verify(c.Request.Context(), req.CaptchaID, req.Answer) {
		c.JSON(http.StatusOK, gin.H{"code": 0, "message": "success", "data": gin.H{"verified": true}})
	} else {
		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "invalid captcha"})
	}
}
