package websocket

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

type RelayInfo struct {
	Name          string  `json:"name"`
	Description   string  `json:"description"`
	Pubkey        string  `json:"pubkey,omitempty"`
	Contact       string  `json:"contact,omitempty"`
	Icon          string  `json:"icon,omitempty"`
	SupportedNIPs []int   `json:"supported_nips"`
	Software      string  `json:"software"`
	Version       string  `json:"version"`
	Limitation    *Limits `json:"limitation,omitempty"`
}

type Limits struct {
	MaxMessageLength    int  `json:"max_message_length,omitempty"`
	MaxSubscriptions    int  `json:"max_subscriptions,omitempty"`
	MaxFilters          int  `json:"max_filters,omitempty"`
	MaxLimit            int  `json:"max_limit,omitempty"`
	MaxSubidLength      int  `json:"max_subid_length,omitempty"`
	MaxEventTags        int  `json:"max_event_tags,omitempty"`
	MaxContentLength    int  `json:"max_content_length,omitempty"`
	MinPowDifficulty    int  `json:"min_pow_difficulty,omitempty"`
	AuthRequired        bool `json:"auth_required"`
	PaymentRequired     bool `json:"payment_required"`
	RestrictedWrites    bool `json:"restricted_writes"`
}

func (h *Handler) ServeNIP11(w http.ResponseWriter, r *http.Request) {
	// Defaults
	name := "muxstr relay"
	description := "High-performance Nostr relay with gRPC, Connect, and WebSocket support"
	var pubkey, contact, icon string

	// Override from config if set
	if h.relayConfig != nil {
		if h.relayConfig.Name != "" {
			name = h.relayConfig.Name
		}
		if h.relayConfig.Description != "" {
			description = h.relayConfig.Description
		}
		pubkey = h.relayConfig.Pubkey
		contact = h.relayConfig.Contact
		icon = h.relayConfig.Icon
	}

	// Determine auth status from authConfig
	authRequired := false
	restrictedWrites := false
	if h.authConfig != nil {
		authRequired = h.authConfig.ReadEnabled
		restrictedWrites = h.authConfig.WriteEnabled
	}

	info := RelayInfo{
		Name:          name,
		Description:   description,
		Pubkey:        pubkey,
		Contact:       contact,
		Icon:          icon,
		SupportedNIPs: []int{1, 9, 11, 42},
		Software:      "northwest.io/muxstr",
		Version:       "0.1.0",
		Limitation: &Limits{
			MaxMessageLength: 65536,
			MaxSubscriptions: 20,
			MaxFilters:       10,
			MaxLimit:         5000,
			MaxSubidLength:   64,
			MaxEventTags:     2000,
			MaxContentLength: 65536,
			AuthRequired:     authRequired,
			PaymentRequired:  false,
			RestrictedWrites: restrictedWrites,
		},
	}

	w.Header().Set("Content-Type", "application/nostr+json")
	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Accept")
	w.Header().Set("Access-Control-Allow-Methods", "GET")

	json.NewEncoder(w).Encode(info)
}