package entitlement

import (
	entitlementservice "backend/internal/service/entitlement"
	"backend/utils"
	"net/http"
	"strconv"

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

// EntitlementController 客户权益控制器 // Logan.Li
type EntitlementController struct {
	svc *entitlementservice.EntitlementService
	db  *gorm.DB
}

// NewEntitlementController 创建控制器实例 // Logan.Li
func NewEntitlementController(db *gorm.DB) *EntitlementController {
	return &EntitlementController{svc: entitlementservice.NewEntitlementService(db), db: db}
}

// List 权益列表 // Logan.Li
func (ctrl *EntitlementController) List(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
	customerID, _ := strconv.ParseUint(c.Query("customer_id"), 10, 32)
	productID, _ := strconv.ParseUint(c.Query("product_id"), 10, 32)

	entitlements, total, err := ctrl.svc.List(page, pageSize, uint(customerID), uint(productID))
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{
		"list": entitlements, "total": total, "page": page, "page_size": pageSize,
		"total_pages": (total + int64(pageSize) - 1) / int64(pageSize),
	}})
}

// Get 权益详情 // Logan.Li
func (ctrl *EntitlementController) Get(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
	ent, err := ctrl.svc.GetByID(uint(id))
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 404, "message": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "data": ent})
}

// Revoke 吊销权益 // Logan.Li
func (ctrl *EntitlementController) Revoke(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
	if err := ctrl.svc.Revoke(uint(id)); err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	utils.LogAction(ctrl.db, c, "revoke", "entitlement", uint(id), "", "", "", "吊销客户权益")
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "权益已吊销"})
}

// Renew 续费权益 // Logan.Li
func (ctrl *EntitlementController) Renew(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)
	var req struct {
		PlanID uint `json:"plan_id" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
		return
	}
	ent, err := ctrl.svc.Renew(uint(id), req.PlanID)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	utils.LogAction(ctrl.db, c, "renew", "entitlement", ent.ID, "", "", "", "续费客户权益")
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "续费成功", "data": ent})
}

// GetByEmail 按邮箱查询客户权益（客户端接口） // Logan.Li
func (ctrl *EntitlementController) GetByEmail(c *gin.Context) {
	email := c.Query("email")
	if email == "" {
		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "缺少 email 参数"})
		return
	}
	entitlements, err := ctrl.svc.GetByEmail(email)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "data": entitlements})
}