package api

import (
	"encoding/json"
	"net/http"

	"proxmox-router/internal/dhcp"
)

func (s *Server) handleListDHCPClients(w http.ResponseWriter, r *http.Request) {
	clients := s.dhcpMgr.ListClients()
	writeJSON(w, http.StatusOK, clients)
}

func (s *Server) handleGetDHCPSummary(w http.ResponseWriter, r *http.Request) {
	summary := s.dhcpMgr.GetSummary()
	writeJSON(w, http.StatusOK, summary)
}

func (s *Server) handleCreateDHCPClient(w http.ResponseWriter, r *http.Request) {
	var req dhcp.CreateDHCPClientRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Invalid JSON: " + err.Error()})
		return
	}

	client, err := s.dhcpMgr.AddClient(req)
	if err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
		return
	}

	writeJSON(w, http.StatusCreated, client)
}

func (s *Server) handleUpdateDHCPClient(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if id == "" {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Client ID is required"})
		return
	}

	var req dhcp.UpdateDHCPClientRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Invalid JSON: " + err.Error()})
		return
	}

	client, err := s.dhcpMgr.UpdateClient(id, req)
	if err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
		return
	}

	writeJSON(w, http.StatusOK, client)
}

func (s *Server) handleDeleteDHCPClient(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if id == "" {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Client ID is required"})
		return
	}

	if err := s.dhcpMgr.DeleteClient(id); err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
		return
	}

	writeJSON(w, http.StatusOK, map[string]string{"status": "deleted"})
}

func (s *Server) handleToggleDHCPClientState(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if id == "" {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Client ID is required"})
		return
	}

	var payload struct {
		Enabled bool `json:"enabled"`
	}
	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Invalid JSON: " + err.Error()})
		return
	}

	if err := s.dhcpMgr.ToggleState(id, payload.Enabled); err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
		return
	}

	writeJSON(w, http.StatusOK, map[string]string{"status": "updated"})
}

func (s *Server) handleRenewDHCPClient(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if id == "" {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Client ID is required"})
		return
	}

	if err := s.dhcpMgr.RenewLease(id); err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
		return
	}

	writeJSON(w, http.StatusOK, map[string]string{"status": "renewed"})
}

func (s *Server) handleReleaseDHCPClient(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if id == "" {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Client ID is required"})
		return
	}

	if err := s.dhcpMgr.ReleaseLease(id); err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
		return
	}

	writeJSON(w, http.StatusOK, map[string]string{"status": "released"})
}