package handler

import (
	"net/http"
	"time"

	"silk-server-go/internal/middleware"
	"silk-server-go/internal/model"

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

// RegisterNotificationRoutes 注册通知路由
func RegisterNotificationRoutes(rg *gin.RouterGroup, db *gorm.DB) {
	readPerm := middleware.RequirePermission(db, "alarm:read")
	rg.GET("/notifications", readPerm, listNotifications(db))
	rg.POST("/notifications", readPerm, createNotification(db))
}

// listNotifications 通知列表（上限200）
func listNotifications(db *gorm.DB) gin.HandlerFunc {
	return func(c *gin.Context) {
		var list []model.Notification
		db.Order("created_at DESC").Limit(200).Find(&list)
		c.JSON(http.StatusOK, list)
	}
}

// createNotification 手动发通知
func createNotification(db *gorm.DB) gin.HandlerFunc {
	return func(c *gin.Context) {
		var body struct {
			Channel string `json:"channel"`
			Target  string `json:"target"`
			Title   string `json:"title"`
			Body    string `json:"body"`
		}
		if err := c.ShouldBindJSON(&body); err != nil {
			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
			return
		}

		ntf := model.Notification{
			UserID:        currentUserID(c),
			Channel:       body.Channel,
			Target:        body.Target,
			Title:         body.Title,
			Body:          body.Body,
			Status:        "sent",
			NextAttemptAt: time.Now(),
		}
		if ntf.Channel == "" {
			ntf.Channel = "manual"
		}
		if ntf.Target == "" {
			ntf.Target = "all"
		}
		if err := db.Create(&ntf).Error; err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{"error": "创建通知失败"})
			return
		}
		c.JSON(http.StatusCreated, ntf)
	}
}