package handlers

import (
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"

	"veza-backend-api/internal/services"
)

// AnnouncementHandler handles announcement endpoints (v0.803 ADM1-04)
type AnnouncementHandler struct {
	svc *services.AnnouncementService
}

// NewAnnouncementHandler creates a new AnnouncementHandler
func NewAnnouncementHandler(svc *services.AnnouncementService) *AnnouncementHandler {
	return &AnnouncementHandler{svc: svc}
}

// List returns all announcements (admin)
func (h *AnnouncementHandler) List(c *gin.Context) {
	list, err := h.svc.List(c.Request.Context())
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list announcements"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"announcements": list})
}

// Create creates an announcement (admin)
func (h *AnnouncementHandler) Create(c *gin.Context) {
	userID, ok := GetUserIDUUID(c)
	if !ok || userID == uuid.Nil {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Authentication required"})
		return
	}

	var req services.CreateAnnouncementRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "title and content are required"})
		return
	}

	a, err := h.svc.Create(c.Request.Context(), userID, req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create announcement"})
		return
	}
	c.JSON(http.StatusCreated, a)
}

// Delete deletes an announcement (admin)
func (h *AnnouncementHandler) Delete(c *gin.Context) {
	idStr := c.Param("id")
	id, err := uuid.Parse(idStr)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid announcement ID"})
		return
	}

	if err := h.svc.Delete(c.Request.Context(), id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "Announcement deleted"})
}

// GetActive returns active announcements (public)
func (h *AnnouncementHandler) GetActive(c *gin.Context) {
	list, err := h.svc.GetActive(c.Request.Context())
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get announcements"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"announcements": list})
}