package service

import (
	"net/http"
	"testing"
	"time"

	"github.com/QuantumNous/new-api/common"
	"github.com/stretchr/testify/require"
)

func preserveHTTPClientState(t *testing.T) {
	t.Helper()
	oldDefaultClient := httpClient
	oldTimeout := common.RelayTimeout
	proxyClientLock.Lock()
	oldProxyClients := proxyClients
	proxyClients = make(map[string]*http.Client)
	proxyClientLock.Unlock()
	t.Cleanup(func() {
		httpClient = oldDefaultClient
		common.RelayTimeout = oldTimeout
		proxyClientLock.Lock()
		proxyClients = oldProxyClients
		proxyClientLock.Unlock()
	})
}

func TestNewProxyHttpClientCachesHTTPProxyAndRejectsUnsupportedScheme(t *testing.T) {
	preserveHTTPClientState(t)
	common.RelayTimeout = 7

	first, err := NewProxyHttpClient("http://proxy.example:8080")
	require.NoError(t, err)
	second, err := NewProxyHttpClient("http://proxy.example:8080")
	require.NoError(t, err)
	require.Same(t, first, second)
	require.Equal(t, 7*time.Second, first.Timeout)

	_, err = NewProxyHttpClient("ftp://proxy.example:21")
	require.ErrorContains(t, err, "unsupported proxy scheme")
}

func TestNewProxyHttpClientReturnsInitializedDefaultClientForEmptyProxy(t *testing.T) {
	preserveHTTPClientState(t)
	defaultClient := &http.Client{}
	httpClient = defaultClient

	client, err := NewProxyHttpClient("")

	require.NoError(t, err)
	require.Same(t, defaultClient, client)
}

func TestInitHttpClientAppliesConfiguredTimeout(t *testing.T) {
	preserveHTTPClientState(t)
	common.RelayTimeout = 3

	InitHttpClient()

	require.NotNil(t, GetHttpClient())
	require.Equal(t, 3*time.Second, GetHttpClient().Timeout)
	require.NotNil(t, GetHttpClient().CheckRedirect)
}