package test

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"gitea.avt.data-center.id/othman.suseno/atlas/internal/httpapp"
)

// TestServer provides an integration test server
type TestServer struct {
	App       *httpapp.App
	Server    *httptest.Server
	Client    *http.Client
	AuthToken string
}

// NewTestServer creates a new test server
func NewTestServer(t *testing.T) *TestServer {
	// Use absolute paths or create templates directory for tests
	templatesDir := "web/templates"
	staticDir := "web/static"

	app, err := httpapp.New(httpapp.Config{
		Addr:         ":0", // Use random port
		TemplatesDir: templatesDir,
		StaticDir:    staticDir,
		DatabasePath: "", // Empty = in-memory mode (no database)
	})
	if err != nil {
		t.Fatalf("create test app: %v", err)
	}

	server := httptest.NewServer(app.Router())

	return &TestServer{
		App:    app,
		Server: server,
		Client: &http.Client{},
	}
}

// Close shuts down the test server
func (ts *TestServer) Close() {
	ts.Server.Close()
	ts.App.StopScheduler()
}

// Login performs a login and stores the auth token
func (ts *TestServer) Login(t *testing.T, username, password string) {
	reqBody := map[string]string{
		"username": username,
		"password": password,
	}

	body, _ := json.Marshal(reqBody)
	req, err := http.NewRequest("POST", ts.Server.URL+"/api/v1/auth/login",
		bytes.NewReader(body))
	if err != nil {
		t.Fatalf("create login request: %v", err)
	}
	req.Header.Set("Content-Type", "application/json")

	resp, err := ts.Client.Do(req)
	if err != nil {
		t.Fatalf("login request: %v", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		t.Fatalf("login failed with status %d", resp.StatusCode)
	}

	var result map[string]interface{}
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		t.Fatalf("decode login response: %v", err)
	}

	if token, ok := result["token"].(string); ok {
		ts.AuthToken = token
	} else {
		t.Fatal("no token in login response")
	}
}

// Get performs an authenticated GET request
func (ts *TestServer) Get(t *testing.T, path string) *http.Response {
	req, err := http.NewRequest("GET", ts.Server.URL+path, nil)
	if err != nil {
		t.Fatalf("create GET request: %v", err)
	}

	if ts.AuthToken != "" {
		req.Header.Set("Authorization", "Bearer "+ts.AuthToken)
	}

	resp, err := ts.Client.Do(req)
	if err != nil {
		t.Fatalf("GET request: %v", err)
	}

	return resp
}

// Post performs an authenticated POST request
func (ts *TestServer) Post(t *testing.T, path string, body interface{}) *http.Response {
	bodyBytes, err := json.Marshal(body)
	if err != nil {
		t.Fatalf("marshal request body: %v", err)
	}

	req, err := http.NewRequest("POST", ts.Server.URL+path, bytes.NewReader(bodyBytes))
	if err != nil {
		t.Fatalf("create POST request: %v", err)
	}

	req.Header.Set("Content-Type", "application/json")
	if ts.AuthToken != "" {
		req.Header.Set("Authorization", "Bearer "+ts.AuthToken)
	}

	resp, err := ts.Client.Do(req)
	if err != nil {
		t.Fatalf("POST request: %v", err)
	}

	return resp
}

// TestHealthCheck tests the health check endpoint
func TestHealthCheck(t *testing.T) {
	ts := NewTestServer(t)
	defer ts.Close()

	resp := ts.Get(t, "/healthz")
	if resp.StatusCode != http.StatusOK {
		t.Errorf("expected status 200, got %d", resp.StatusCode)
	}
}

// TestLogin tests the login endpoint
func TestLogin(t *testing.T) {
	ts := NewTestServer(t)
	defer ts.Close()

	// Test with default admin credentials
	ts.Login(t, "admin", "admin")

	if ts.AuthToken == "" {
		t.Error("expected auth token after login")
	}
}

// TestUnauthorizedAccess tests that protected endpoints require authentication
func TestUnauthorizedAccess(t *testing.T) {
	ts := NewTestServer(t)
	defer ts.Close()

	resp := ts.Get(t, "/api/v1/pools")
	if resp.StatusCode != http.StatusUnauthorized {
		t.Errorf("expected status 401, got %d", resp.StatusCode)
	}
}

// TestAuthenticatedAccess tests that authenticated requests work
func TestAuthenticatedAccess(t *testing.T) {
	ts := NewTestServer(t)
	defer ts.Close()

	ts.Login(t, "admin", "admin")

	resp := ts.Get(t, "/api/v1/pools")
	if resp.StatusCode != http.StatusOK {
		t.Errorf("expected status 200, got %d", resp.StatusCode)
	}
}