package web

import (
	"fmt"
	"net/http"
	"strconv"

	"github.com/owen/vibeproxy/internal/auth"
	"github.com/owen/vibeproxy/internal/database"
	"github.com/owen/vibeproxy/internal/logging"
	"github.com/owen/vibeproxy/internal/models"
)

func (h *Web) handleStreamsList(w http.ResponseWriter, r *http.Request) {
	streams, err := database.ListStreams(h.db)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	render(w, "streams", PageData{
		Active: "streams", Title: "TCP/UDP Streams", CSRFToken: h.csrf.Token(w),
		Flash: r.URL.Query().Get("flash"), FlashKind: r.URL.Query().Get("kind"),
		Data: streams,
	})
}

func (h *Web) handleStreamForm(w http.ResponseWriter, r *http.Request) {
	var s models.Stream
	isNew := true
	if idStr := r.PathValue("id"); idStr != "" {
		isNew = false
		id, _ := strconv.ParseInt(idStr, 10, 64)
		existing, err := database.GetStream(h.db, id)
		if err != nil {
			http.Error(w, "stream not found", http.StatusNotFound)
			return
		}
		s = *existing
	} else {
		s = models.Stream{Protocol: models.StreamTCP, ConnectTimeoutMS: 5000, IdleTimeoutMS: 300000, Enabled: true}
	}
	render(w, "stream_form", PageData{
		Active: "streams", Title: pageTitle(isNew, "Stream"), CSRFToken: h.csrf.Token(w),
		Data: map[string]any{"Stream": s, "IsNew": isNew},
	})
}

func (h *Web) handleStreamCreate(w http.ResponseWriter, r *http.Request) { h.saveStreamForm(w, r, 0) }
func (h *Web) handleStreamUpdate(w http.ResponseWriter, r *http.Request) {
	id, _ := strconv.ParseInt(r.PathValue("id"), 10, 64)
	h.saveStreamForm(w, r, id)
}

func (h *Web) saveStreamForm(w http.ResponseWriter, r *http.Request, id int64) {
	if err := r.ParseForm(); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	s := models.Stream{
		ID:               id,
		Protocol:         models.StreamProtocol(r.FormValue("protocol")),
		ListenIP:         r.FormValue("listen_ip"),
		ListenPort:       atoiDefault(r.FormValue("listen_port"), 0),
		DestinationHost:  r.FormValue("destination_host"),
		DestinationPort:  atoiDefault(r.FormValue("destination_port"), 0),
		ConnectTimeoutMS: atoiDefault(r.FormValue("connect_timeout_ms"), 5000),
		IdleTimeoutMS:    atoiDefault(r.FormValue("idle_timeout_ms"), 300000),
		ProxyProtocol:    r.FormValue("proxy_protocol") == "on",
		Enabled:          r.FormValue("enabled") == "on",
		Comments:         r.FormValue("comments"),
	}
	if s.ListenPort <= 0 || s.ListenPort > 65535 || s.DestinationHost == "" || s.DestinationPort <= 0 {
		render(w, "stream_form", PageData{
			Active: "streams", Title: pageTitle(id == 0, "Stream"), CSRFToken: h.csrf.Token(w),
			Flash: "Please provide a valid listen port and destination.", FlashKind: "danger",
			Data: map[string]any{"Stream": s, "IsNew": id == 0},
		})
		return
	}
	if _, err := database.SaveStream(h.db, &s); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	h.reloadStreams(r)
	logging.Audit(h.db, auth.ActorFromContext(r.Context()), "stream_changed", fmt.Sprintf("%s:%d", s.Protocol, s.ListenPort), "")
	http.Redirect(w, r, "/streams?flash="+flashMsg("Stream saved")+"&kind=success", http.StatusFound)
}

func (h *Web) handleStreamDelete(w http.ResponseWriter, r *http.Request) {
	id, _ := strconv.ParseInt(r.PathValue("id"), 10, 64)
	if err := database.DeleteStream(h.db, id); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	h.reloadStreams(r)
	logging.Audit(h.db, auth.ActorFromContext(r.Context()), "stream_changed", fmt.Sprintf("id=%d", id), "deleted")
	http.Redirect(w, r, "/streams?flash="+flashMsg("Stream deleted")+"&kind=success", http.StatusFound)
}

func (h *Web) handleStreamToggle(w http.ResponseWriter, r *http.Request) {
	id, _ := strconv.ParseInt(r.PathValue("id"), 10, 64)
	existing, err := database.GetStream(h.db, id)
	if err != nil {
		http.Error(w, "not found", http.StatusNotFound)
		return
	}
	if err := database.SetStreamEnabled(h.db, id, !existing.Enabled); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	h.reloadStreams(r)
	logging.Audit(h.db, auth.ActorFromContext(r.Context()), "stream_changed", fmt.Sprintf("id=%d", id), fmt.Sprintf("enabled=%v", !existing.Enabled))
	http.Redirect(w, r, "/streams", http.StatusFound)
}