package config

import (
	"reflect"
	"time"
)

// JSCKServerProxy is the server proxy section's configuration key.
const JSCKServerProxy string = "proxy"

// JSCServerProxy configures which proxies the server trusts and how it finds
// the client's address behind them. TrustedProxies are IP addresses and CIDR
// ranges; empty means no proxy is trusted. ClientIPHeaders are the headers
// read for the client's address from a trusted proxy, in priority order;
// empty means the connection's own address is always used.
type JSCServerProxy struct {
	TrustedProxies  []string               `cfg:"trusted"           default:"127.0.0.1/32"`
	ClientIPHeaders []string               `cfg:"client_ip_headers" default:"X-Forwarded-For, Forwarded, X-Real-IP"`
	StripUntrusted  bool                   `cfg:"strip_untrusted"   default:"true"`
	ProxyProtocol   JSCServerProxyProtocol `cfg:"proxy_protocol"`
}

// ---------- Section methods (see Section) ----------

// Map implements Section.
func (c JSCServerProxy) Map() map[string]any { return mapOf(c) }

// Flatten implements Section.
func (c JSCServerProxy) Flatten() map[string]any {
	return flattenOf(JSCKServerProxy, c)
}

// TypeOf implements Section.
func (c JSCServerProxy) TypeOf(key string) (reflect.Kind, error) {
	return typeOf(c, key)
}

// ValueOf implements Section.
func (c JSCServerProxy) ValueOf(key string) (any, error) {
	return valueOf(c, key)
}

// SetValue implements Section.
func (c *JSCServerProxy) SetValue(key string, value any) error {
	return setValue(c, key, value)
}

// ========== PROXY protocol ==========

// JSCKServerProxyProtocol is the server proxy PROXY protocol section's
// configuration key.
const JSCKServerProxyProtocol string = "proxy_protocol"

// JSCServerProxyProtocol configures accepting the PROXY protocol from
// trusted proxies. TrustedSources may send PROXY headers; empty means
// Proxy.TrustedProxies. ReadHeaderTimeout is how long to wait for the PROXY
// header; 0 or less means no limit.
type JSCServerProxyProtocol struct {
	Enabled           bool          `cfg:"enabled"             default:"false"`
	TrustedSources    []string      `cfg:"trusted_sources"`
	Required          bool          `cfg:"required"            default:"false"`
	ReadHeaderTimeout time.Duration `cfg:"read_header_timeout" default:"5s"`
}

// ---------- Section methods (see Section) ----------

// Map implements Section.
func (c JSCServerProxyProtocol) Map() map[string]any { return mapOf(c) }

// Flatten implements Section.
func (c JSCServerProxyProtocol) Flatten() map[string]any {
	return flattenOf(JSCKServerProxyProtocol, c)
}

// TypeOf implements Section.
func (c JSCServerProxyProtocol) TypeOf(key string) (reflect.Kind, error) {
	return typeOf(c, key)
}

// ValueOf implements Section.
func (c JSCServerProxyProtocol) ValueOf(key string) (any, error) {
	return valueOf(c, key)
}

// SetValue implements Section.
func (c *JSCServerProxyProtocol) SetValue(key string, value any) error {
	return setValue(c, key, value)
}