package chat

import (
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
)

// CreateQrCodeHandler 创建二维码
func (h *Handler) CreateQrCodeHandler(c *gin.Context) {
	var req CreateQrCodeRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	adminID := c.GetUint64("admin_id")
	qrcode, err := h.service.repo.CreateQrCode(c.Request.Context(), adminID, req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"data": qrcode})
}

// BatchCreateQrCodeHandler 批量创建二维码
func (h *Handler) BatchCreateQrCodeHandler(c *gin.Context) {
	var req BatchCreateQrCodeRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	adminID := c.GetUint64("admin_id")
	qrcodes, err := h.service.repo.BatchCreateQrCode(c.Request.Context(), adminID, req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"data": qrcodes})
}

// ListQrCodesHandler 列表查询二维码
func (h *Handler) ListQrCodesHandler(c *gin.Context) {
	var req QrCodeListRequest
	if err := c.ShouldBindQuery(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	qrcodes, total, err := h.service.repo.ListQrCodes(c.Request.Context(), req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"data": PaginatedResult{
			Items:    qrcodes,
			Total:    total,
			Page:     req.Page,
			PageSize: req.Limit,
		},
	})
}

// GetQrCodeStatsHandler 获取二维码统计
func (h *Handler) GetQrCodeStatsHandler(c *gin.Context) {
	stats, err := h.service.repo.GetQrCodeStats(c.Request.Context())
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"data": stats})
}

// UpdateQrCodeHandler 更新二维码
func (h *Handler) UpdateQrCodeHandler(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的ID"})
		return
	}

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

	if err := h.service.repo.UpdateQrCode(c.Request.Context(), id, req); err != nil {
		if err == ErrQrCodeNotFound {
			c.JSON(http.StatusNotFound, gin.H{"error": "二维码不存在"})
			return
		}
		if err == ErrQrCodeCannotReenable {
			c.JSON(http.StatusBadRequest, gin.H{"error": "已发放的二维码不能改回待用"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "更新成功"})
}

// DeleteQrCodeHandler 删除二维码
func (h *Handler) DeleteQrCodeHandler(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的ID"})
		return
	}

	if err := h.service.repo.DeleteQrCode(c.Request.Context(), id); err != nil {
		if err == ErrQrCodeNotFound {
			c.JSON(http.StatusNotFound, gin.H{"error": "二维码不存在"})
			return
		}
		if err == ErrQrCodeCannotDelete {
			c.JSON(http.StatusBadRequest, gin.H{"error": "已使用的二维码不能删除"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "删除成功"})
}