package period

import (
	"net/http"

	"github.com/coder/websocket"
	"github.com/coder/websocket/wsjson"
	"github.com/yusing/go-proxy/internal/api/v1/utils"
	config "github.com/yusing/go-proxy/internal/config/types"
)

func (p *Poller[T, AggregateT]) lastResultHandler(w http.ResponseWriter, r *http.Request) {
	info := p.GetLastResult()
	if info == nil {
		http.Error(w, "no system info", http.StatusNoContent)
		return
	}
	utils.RespondJSON(w, r, info)
}

func (p *Poller[T, AggregateT]) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	period := r.URL.Query().Get("period")
	if period == "" {
		p.lastResultHandler(w, r)
		return
	}
	periodFilter := Filter(period)
	if !periodFilter.IsValid() {
		http.Error(w, "invalid period", http.StatusBadRequest)
		return
	}
	rangeData := p.Get(periodFilter)
	if len(rangeData) == 0 {
		http.Error(w, "no data", http.StatusNoContent)
		return
	}
	if p.aggregator != nil {
		aggregated := p.aggregator(rangeData...)
		utils.RespondJSON(w, r, aggregated)
	} else {
		utils.RespondJSON(w, r, rangeData)
	}
}

func (p *Poller[T, AggregateT]) ServeWS(cfg config.ConfigInstance, w http.ResponseWriter, r *http.Request) {
	utils.PeriodicWS(cfg, w, r, p.interval, func(conn *websocket.Conn) error {
		return wsjson.Write(r.Context(), conn, p.GetLastResult())
	})
}