package handler

import (
	"net/http"
	"strconv"

	"github.com/company/ai-ops/internal/domain/repository"
	"github.com/company/ai-ops/pkg/errors"
	"github.com/company/ai-ops/pkg/response"
)

// AlertHandler 是告警事件 HTTP 处理器
type AlertHandler struct {
	repo repository.AlertRepository
}

func NewAlertHandler(repo repository.AlertRepository) *AlertHandler {
	return &AlertHandler{repo: repo}
}

func (h *AlertHandler) RegisterRoutes(mux *http.ServeMux) {
	mux.HandleFunc("GET /api/v1/ai-ops/alerts", h.ListAlerts)
}

func (h *AlertHandler) ListAlerts(w http.ResponseWriter, r *http.Request) {
	query := r.URL.Query()
	status := query.Get("status")
	page, _ := strconv.Atoi(query.Get("page"))
	pageSize, _ := strconv.Atoi(query.Get("page_size"))
	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 20
	}

	events, total, err := h.repo.ListEvents(r.Context(), status, page, pageSize)
	if err != nil {
		response.Error(w, errors.Wrap(err, errors.ErrInternal))
		return
	}
	response.Success(w, map[string]any{"items": events, "total": total, "page": page, "page_size": pageSize})
}