package httpapi

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"strconv"
	"strings"
	"testing"

	"webui4frpc/internal/process"
	"webui4frpc/internal/store"
)

func newTestHandler(t *testing.T) (*Handler, *httptest.Server) {
	t.Helper()
	dir := t.TempDir()
	st, err := store.New(filepath.Join(dir, "test.db"))
	if err != nil {
		t.Fatal(err)
	}

	pm := process.NewManager(process.Options{
		ConfigsDir:      filepath.Join(dir, "configs"),
		LogsDir:         filepath.Join(dir, "logs"),
		BinaryPath:      func() string { return "" },
		Render:          func(string) ([]byte, error) { return []byte(`{}`), nil },
		AutoRestart:     func(string) bool { return false },
		RestartInterval: func() int { return 5 },
	})

	h := &Handler{Store: st, Process: pm, WorkDir: dir, User: "admin", Password: "pw"}
	mux, err := NewServeMux(h)
	if err != nil {
		t.Fatal(err)
	}
	ts := httptest.NewServer(mux)
	t.Cleanup(ts.Close)
	t.Cleanup(func() { _ = st.Close() })
	return h, ts
}

func TestAuthRequired(t *testing.T) {
	_, ts := newTestHandler(t)
	resp, err := http.Get(ts.URL + "/api/manager/status")
	if err != nil {
		t.Fatal(err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusUnauthorized {
		t.Fatalf("status = %d, want 401", resp.StatusCode)
	}
}

func TestCanvasRoundTrip(t *testing.T) {
	_, ts := newTestHandler(t)
	client := ts.Client()

	body := `{
		"locals": [{"name":"web","ip":"127.0.0.1","port":8080,"protocol":"tcp"}],
		"remotes": [{"name":"srv-a","ip":"1.2.3.4","port":7000,"enabled":true}],
		"links": [{"local":"web","remote":"srv-a","remotePort":8080}]
	}`
	req, _ := http.NewRequest(http.MethodPut, ts.URL+"/api/manager/canvas", bytes.NewBufferString(body))
	req.SetBasicAuth("admin", "pw")
	resp, err := client.Do(req)
	if err != nil {
		t.Fatal(err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("save canvas status = %d", resp.StatusCode)
	}

	var got canvasData
	if err := json.NewDecoder(resp.Body).Decode(&got); err != nil {
		t.Fatal(err)
	}
	if len(got.Locals) != 1 || got.Locals[0].Name != "web" {
		t.Fatalf("locals = %+v", got.Locals)
	}
	if len(got.Links) != 1 || got.Links[0].RemotePort != 8080 {
		t.Fatalf("links = %+v", got.Links)
	}

	// GET again to confirm persistence via store.
	req2, _ := http.NewRequest(http.MethodGet, ts.URL+"/api/manager/canvas", nil)
	req2.SetBasicAuth("admin", "pw")
	resp2, err2 := client.Do(req2)
	if err2 != nil {
		t.Fatal(err2)
	}
	defer resp2.Body.Close()
	var got2 canvasData
	_ = json.NewDecoder(resp2.Body).Decode(&got2)
	if len(got2.Remotes) != 1 || got2.Remotes[0].Name != "srv-a" {
		t.Fatalf("remotes after reload = %+v", got2.Remotes)
	}
}

func TestSettingsPutRoundTrip(t *testing.T) {
	_, ts := newTestHandler(t)
	client := ts.Client()

	// PUT updated settings
	body := `{"autoStartProfiles":false,"restartOnExit":false,"restartIntervalSeconds":12}`
	req, _ := http.NewRequest(http.MethodPut, ts.URL+"/api/manager/settings", bytes.NewBufferString(body))
	req.SetBasicAuth("admin", "pw")
	resp, err := client.Do(req)
	if err != nil {
		t.Fatal(err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("PUT settings status = %d, want 200", resp.StatusCode)
	}

	// Confirm response body reflects saved values
	var saved store.Settings
	if err := json.NewDecoder(resp.Body).Decode(&saved); err != nil {
		t.Fatal(err)
	}
	if saved.AutoStartProfiles || saved.RestartOnExit || saved.RestartIntervalSeconds != 12 {
		t.Fatalf("saved settings = %+v", saved)
	}

	// GET again to confirm persistence
	req2, _ := http.NewRequest(http.MethodGet, ts.URL+"/api/manager/settings", nil)
	req2.SetBasicAuth("admin", "pw")
	resp2, err2 := client.Do(req2)
	if err2 != nil {
		t.Fatal(err2)
	}
	defer resp2.Body.Close()
	var got store.Settings
	_ = json.NewDecoder(resp2.Body).Decode(&got)
	if got.AutoStartProfiles || got.RestartOnExit || got.RestartIntervalSeconds != 12 {
		t.Fatalf("settings after reload = %+v", got)
	}
}

// TestFetchProxyStatesFromAdminAPI verifies the M3 status path: we mock the
// frpc admin API (/api/status with Basic Auth) and confirm fetchProxyStates
// parses per-proxy rows and connStateAdmin derives the right summary.
func TestFetchProxyStatesFromAdminAPI(t *testing.T) {
	// Mock frpc admin server.
	admin := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		u, p, ok := r.BasicAuth()
		if !ok || u != "admin" || p != "pw" {
			w.WriteHeader(http.StatusUnauthorized)
			return
		}
		if r.URL.Path != "/api/status" {
			http.NotFound(w, r)
			return
		}
		_ = json.NewEncoder(w).Encode(map[string][]proxyState{
			"tcp": {
				{Name: "web1", Type: "tcp", Status: "running", LocalAddr: "127.0.0.1:8080", RemoteAddr: "1.2.3.4:8080"},
				{Name: "web2", Type: "tcp", Status: "check failed", Err: "health check failed"},
			},
		})
	}))
	defer admin.Close()
	u := strings.TrimPrefix(admin.URL, "http://")
	host, portStr, _ := strings.Cut(u, ":")
	port, _ := strconv.Atoi(portStr)

	states, err := fetchProxyStates(host, port, "admin", "pw")
	if err != nil {
		t.Fatalf("fetchProxyStates: %v", err)
	}
	if len(states) != 2 {
		t.Fatalf("states = %+v", states)
	}
	if states[0].Status != "running" || states[1].Status != "check failed" {
		t.Fatalf("unexpected states = %+v", states)
	}

	// connStateAdmin: one running -> connected.
	if got := connStateAdmin(states); got != "connected" {
		t.Fatalf("connStateAdmin = %q, want connected", got)
	}
	// All failed -> failed.
	if got := connStateAdmin([]proxyState{{Name: "a", Status: "check failed"}, {Name: "b", Status: "start error"}}); got != "failed" {
		t.Fatalf("connStateAdmin(all failed) = %q, want failed", got)
	}
	// wait start -> connecting.
	if got := connStateAdmin([]proxyState{{Name: "a", Status: "wait start"}}); got != "connecting" {
		t.Fatalf("connStateAdmin(wait start) = %q, want connecting", got)
	}
}