package accountNotificationHandler

import (
	"net/http"

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

func NewAccountNotificationHandlers(svc NotificationService) *AccountNotificationHandlers {
	return &AccountNotificationHandlers{Svc: svc}
}

// GET /account/notifications
// Renders: web/templates/account/notifications/index.html
func (h *AccountNotificationHandlers) List(c *gin.Context) {
	userID := mustUserID(c)
	items, err := h.Svc.List(userID)
	if err != nil {
		c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "failed to load notifications"})
		return
	}
	c.HTML(http.StatusOK, "account/notifications/index.html", gin.H{
		"title":         "Notifications",
		"notifications": items,
	})
}

// --- Optional since you have read.html ---

// GET /account/notifications/:id
// Renders: web/templates/account/notifications/read.html
func (h *AccountNotificationHandlers) ReadGet(c *gin.Context) {
	userID := mustUserID(c)
	id, err := parseIDParam(c, "id")
	if err != nil {
		c.AbortWithStatus(http.StatusNotFound)
		return
	}
	nt, err := h.Svc.GetByID(userID, id)
	if err != nil || nt == nil {
		c.AbortWithStatus(http.StatusNotFound)
		return
	}
	c.HTML(http.StatusOK, "account/notifications/read.html", gin.H{
		"title":        nt.Title,
		"notification": nt,
	})
}

// --- helpers (same as in messages; consider sharing in a pkg) ---

func mustUserID(c *gin.Context) int64 {
	if v, ok := c.Get("userID"); ok {
		if id, ok2 := v.(int64); ok2 {
			return id
		}
	}
	return 1
}

func parseIDParam(c *gin.Context, name string) (int64, error) {
	return atoi64(c.Param(name))
}

func atoi64(s string) (int64, error) {
	var n int64
	for _, ch := range []byte(s) {
		if ch < '0' || ch > '9' {
			return 0, &strconvNumErr{}
		}
		n = n*10 + int64(ch-'0')
	}
	return n, nil
}

type strconvNumErr struct{}

func (e *strconvNumErr) Error() string { return "invalid number" }