package agenthttp

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/gorilla/websocket"

	"zlh-agent/internal/state"
)

func TestProtectedRoutesRequireAgentToken(t *testing.T) {
	t.Setenv("ZLH_AGENT_TOKEN", "test-token")

	protected := []struct {
		method string
		path   string
		body   string
	}{
		{http.MethodGet, "/status", ""},
		{http.MethodGet, "/ready", ""},
		{http.MethodPost, "/config", "{}"},
		{http.MethodPost, "/start", ""},
		{http.MethodPost, "/stop", ""},
		{http.MethodPost, "/restart", ""},
		{http.MethodGet, "/game/files/list", ""},
		{http.MethodGet, "/game/files/read", ""},
		{http.MethodGet, "/game/files/download", ""},
		{http.MethodPost, "/game/files/upload", ""},
		{http.MethodPost, "/game/files/revert", ""},
		{http.MethodGet, "/game/files/stat", ""},
		{http.MethodGet, "/game/backups", ""},
		{http.MethodPost, "/game/backups", ""},
		{http.MethodPost, "/game/backups/restore", `{"id":"backup-1"}`},
		{http.MethodDelete, "/game/backups/backup-1", ""},
		{http.MethodGet, "/game/mods", ""},
		{http.MethodPost, "/game/mods/install", "{}"},
		{http.MethodPost, "/game/mods/mod-1", "{}"},
		{http.MethodPost, "/agent/update", "{}"},
		{http.MethodGet, "/agent/update/status", ""},
		{http.MethodGet, "/metrics/process", ""},
		{http.MethodPost, "/dev/codeserver/start", ""},
		{http.MethodPost, "/dev/codeserver/stop", ""},
		{http.MethodPost, "/dev/codeserver/restart", ""},
	}

	mux := NewMux()
	for _, tc := range protected {
		t.Run(tc.method+" "+tc.path, func(t *testing.T) {
			req := httptest.NewRequest(tc.method, tc.path, strings.NewReader(tc.body))
			rec := httptest.NewRecorder()

			mux.ServeHTTP(rec, req)

			if rec.Code != http.StatusUnauthorized {
				t.Fatalf("without token status = %d, want %d", rec.Code, http.StatusUnauthorized)
			}

			req = httptest.NewRequest(tc.method, tc.path, strings.NewReader(tc.body))
			req.Header.Set("Authorization", "Bearer test-token")
			rec = httptest.NewRecorder()

			mux.ServeHTTP(rec, req)

			if rec.Code == http.StatusUnauthorized {
				t.Fatalf("with token status = %d, want authorized request to reach handler", rec.Code)
			}
		})
	}
}

func TestProtectedRoutesFailClosedWhenAgentTokenMissing(t *testing.T) {
	t.Setenv("ZLH_AGENT_TOKEN", "")

	mux := NewMux()
	req := httptest.NewRequest(http.MethodGet, "/status", nil)
	rec := httptest.NewRecorder()

	mux.ServeHTTP(rec, req)

	if rec.Code != http.StatusUnauthorized {
		t.Fatalf("status = %d, want %d", rec.Code, http.StatusUnauthorized)
	}
}

func TestPublicRoutesDoNotRequireAgentToken(t *testing.T) {
	t.Setenv("ZLH_AGENT_TOKEN", "")

	mux := NewMux()
	for _, path := range []string{"/health", "/version"} {
		t.Run(path, func(t *testing.T) {
			req := httptest.NewRequest(http.MethodGet, path, nil)
			rec := httptest.NewRecorder()

			mux.ServeHTTP(rec, req)

			if rec.Code == http.StatusUnauthorized {
				t.Fatalf("status = %d, want public route", rec.Code)
			}
		})
	}
}

func TestConsoleWebSocketRequiresAgentToken(t *testing.T) {
	t.Setenv("ZLH_AGENT_TOKEN", "test-token")

	server := httptest.NewServer(NewMux())
	defer server.Close()

	conn, resp, err := websocket.DefaultDialer.Dial(strings.Replace(server.URL, "http://", "ws://", 1)+"/console/stream", nil)
	if conn != nil {
		_ = conn.Close()
	}
	if err == nil {
		t.Fatalf("websocket dial without token succeeded")
	}
	if resp == nil {
		t.Fatalf("websocket dial response is nil: %v", err)
	}
	if resp.StatusCode != http.StatusUnauthorized {
		t.Fatalf("status = %d, want %d", resp.StatusCode, http.StatusUnauthorized)
	}
}

func TestEnsureDevCodeServerInstallsAndStartsWhenRequested(t *testing.T) {
	restoreCodeServerTestHooks(t)

	cfg := &state.Config{
		ContainerType:    "dev",
		Runtime:          "node",
		EnableCodeServer: true,
	}

	installed := false
	running := false
	installCalls := 0
	startCalls := 0
	verifyCalls := 0

	codeServerInstalled = func() bool { return installed }
	codeServerRunning = func() bool { return running }
	codeServerInstall = func(state.Config) error {
		installCalls++
		installed = true
		return nil
	}
	codeServerStart = func(state.Config) error {
		startCalls++
		running = true
		return nil
	}
	codeServerVerify = func() error {
		verifyCalls++
		return nil
	}

	if err := ensureDevCodeServer(cfg); err != nil {
		t.Fatalf("ensureDevCodeServer: %v", err)
	}
	if installCalls != 1 {
		t.Fatalf("installCalls = %d, want 1", installCalls)
	}
	if startCalls != 1 {
		t.Fatalf("startCalls = %d, want 1", startCalls)
	}
	if verifyCalls != 1 {
		t.Fatalf("verifyCalls = %d, want 1", verifyCalls)
	}
}

func TestEnsureDevCodeServerStartsInstalledStoppedAddon(t *testing.T) {
	restoreCodeServerTestHooks(t)

	cfg := &state.Config{
		ContainerType: "dev",
		Runtime:       "node",
		Addons:        []string{"codeserver"},
	}

	running := false
	installCalls := 0
	startCalls := 0

	codeServerInstalled = func() bool { return true }
	codeServerRunning = func() bool { return running }
	codeServerInstall = func(state.Config) error {
		installCalls++
		return nil
	}
	codeServerStart = func(state.Config) error {
		startCalls++
		running = true
		return nil
	}
	codeServerVerify = func() error { return nil }

	if err := ensureDevCodeServer(cfg); err != nil {
		t.Fatalf("ensureDevCodeServer: %v", err)
	}
	if installCalls != 0 {
		t.Fatalf("installCalls = %d, want 0", installCalls)
	}
	if startCalls != 1 {
		t.Fatalf("startCalls = %d, want 1", startCalls)
	}
}

func TestEnsureDevCodeServerSkipsWhenNotRequested(t *testing.T) {
	restoreCodeServerTestHooks(t)

	called := false
	codeServerInstalled = func() bool {
		called = true
		return false
	}

	if err := ensureDevCodeServer(&state.Config{ContainerType: "dev", Runtime: "node"}); err != nil {
		t.Fatalf("ensureDevCodeServer: %v", err)
	}
	if called {
		t.Fatalf("code-server hooks were called for config without code-server request")
	}
}

func restoreCodeServerTestHooks(t *testing.T) {
	t.Helper()

	oldInstall := codeServerInstall
	oldStart := codeServerStart
	oldVerify := codeServerVerify
	oldInstalled := codeServerInstalled
	oldRunning := codeServerRunning

	t.Cleanup(func() {
		codeServerInstall = oldInstall
		codeServerStart = oldStart
		codeServerVerify = oldVerify
		codeServerInstalled = oldInstalled
		codeServerRunning = oldRunning
	})
}