package handlers

import (
	"database/sql"
	"net/http"
	"net/http/httptest"
	"os"
	"strconv"
	"strings"
	"testing"
	"time"

	"go-crm/internal/db"
	"go-crm/internal/whatsapp"

	"golang.org/x/crypto/bcrypt"
)

func TestListClientsWhatsAppDisplay(t *testing.T) {
	tmpfile, err := os.CreateTemp("", "test_*.db")
	if err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpfile.Name())
	tmpfile.Close()

	testDB, err := db.Init(tmpfile.Name())
	if err != nil {
		t.Fatalf("failed to init db: %v", err)
	}
	defer testDB.Close()

	DB = testDB
	WAConnector = whatsapp.NewFakeConnector()

	hashedPassword, _ := bcrypt.GenerateFromPassword([]byte("password"), bcrypt.DefaultCost)
	_, err = testDB.Exec(
		"INSERT INTO accounts (email, name, password, created_at) VALUES (?, ?, ?, ?)",
		"test@example.com", "Test Account", string(hashedPassword), time.Now().Unix(),
	)
	if err != nil {
		t.Fatalf("failed to create account: %v", err)
	}

	var accountID int64
	err = testDB.QueryRow("SELECT account_id FROM accounts WHERE email = ?", "test@example.com").Scan(&accountID)
	if err != nil {
		t.Fatalf("failed to get account id: %v", err)
	}

	sessionID := "test-session"
	expires := time.Now().Add(time.Hour).Unix()
	_, err = testDB.Exec(
		"INSERT INTO sessions (session_id, account_id, expires) VALUES (?, ?, ?)",
		sessionID, accountID, expires,
	)
	if err != nil {
		t.Fatalf("failed to create session: %v", err)
	}

	_, err = testDB.Exec(
		"INSERT INTO clients (account_id, name, phone, created_at) VALUES (?, ?, ?, ?)",
		accountID, "Client Without WhatsApp", "+5521987654321", time.Now().Unix(),
	)
	if err != nil {
		t.Fatalf("failed to create client without wa: %v", err)
	}

	_, err = testDB.Exec(
		"INSERT INTO clients (account_id, name, phone, whatsapp_number, whatsapp_connected, created_at) VALUES (?, ?, ?, ?, ?, ?)",
		accountID, "Client With WhatsApp", "+5521987654322", "+5521987654322", 1, time.Now().Unix(),
	)
	if err != nil {
		t.Fatalf("failed to create client with wa: %v", err)
	}

	req := httptest.NewRequest(http.MethodGet, "/clients", nil)
	req.AddCookie(&http.Cookie{Name: "session", Value: sessionID})
	w := httptest.NewRecorder()

	ListClients(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", w.Code)
	}

	body := w.Body.String()

	if !strings.Contains(body, "Client Without WhatsApp") {
		t.Error("expected to find client without wa in response")
	}

	if !strings.Contains(body, "Connect") {
		t.Error("expected Connect button for client without WhatsApp")
	}

	if !strings.Contains(body, "Client With WhatsApp") {
		t.Error("expected to find client with wa in response")
	}

	if !strings.Contains(body, "+5521987654322") {
		t.Error("expected WhatsApp number displayed for connected client")
	}
}

func SetupTestDB(t *testing.T) (*sql.DB, func()) {
	tmpfile, err := os.CreateTemp("", "test_*.db")
	if err != nil {
		t.Fatal(err)
	}
	tmpfile.Close()

	testDB, err := db.Init(tmpfile.Name())
	if err != nil {
		os.Remove(tmpfile.Name())
		t.Fatalf("failed to init db: %v", err)
	}

	cleanup := func() {
		testDB.Close()
		os.Remove(tmpfile.Name())
	}

	return testDB, cleanup
}

func TestLeadsConnectPage(t *testing.T) {
	testDB, cleanup := SetupTestDB(t)
	defer cleanup()

	DB = testDB
	WAConnector = whatsapp.NewFakeConnector()

	hashedPassword, _ := bcrypt.GenerateFromPassword([]byte("password"), bcrypt.DefaultCost)
	testDB.Exec(
		"INSERT INTO accounts (email, name, password, created_at) VALUES (?, ?, ?, ?)",
		"test@example.com", "Test Account", string(hashedPassword), time.Now().Unix(),
	)

	var accountID int64
	testDB.QueryRow("SELECT account_id FROM accounts WHERE email = ?", "test@example.com").Scan(&accountID)

	sessionID := "test-session"
	testDB.Exec(
		"INSERT INTO sessions (session_id, account_id, expires) VALUES (?, ?, ?)",
		sessionID, accountID, time.Now().Add(time.Hour).Unix(),
	)

	var clientID int64
	testDB.QueryRow(
		"INSERT INTO clients (account_id, name, phone, created_at) VALUES (?, ?, ?, ?) RETURNING client_id",
		accountID, "Test Client", "+5521987654321", time.Now().Unix(),
	).Scan(&clientID)

	req := httptest.NewRequest(http.MethodGet, "/leads/connect?client_id="+strconv.FormatInt(clientID, 10), nil)
	req.AddCookie(&http.Cookie{Name: "session", Value: sessionID})
	w := httptest.NewRecorder()

	LeadsConnectPage(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", w.Code)
	}

	body := w.Body.String()

	if !strings.Contains(body, "Scan to Connect") && !strings.Contains(body, "WhatsApp") {
		t.Error("expected QR connection page with WhatsApp messaging")
	}

	if !strings.Contains(strconv.FormatInt(clientID, 10), "") {
		t.Log("client_id passed to page")
	}
}

func TestLeadsQRPolling(t *testing.T) {
	testDB, cleanup := SetupTestDB(t)
	defer cleanup()

	DB = testDB
	WAConnector = whatsapp.NewFakeConnector()

	hashedPassword, _ := bcrypt.GenerateFromPassword([]byte("password"), bcrypt.DefaultCost)
	testDB.Exec(
		"INSERT INTO accounts (email, name, password, created_at) VALUES (?, ?, ?, ?)",
		"test@example.com", "Test Account", string(hashedPassword), time.Now().Unix(),
	)

	var accountID int64
	testDB.QueryRow("SELECT account_id FROM accounts WHERE email = ?", "test@example.com").Scan(&accountID)

	sessionID := "test-session"
	testDB.Exec(
		"INSERT INTO sessions (session_id, account_id, expires) VALUES (?, ?, ?)",
		sessionID, accountID, time.Now().Add(time.Hour).Unix(),
	)

	var clientID int64
	testDB.QueryRow(
		"INSERT INTO clients (account_id, name, phone, created_at) VALUES (?, ?, ?, ?) RETURNING client_id",
		accountID, "Test Client", "+5521987654321", time.Now().Unix(),
	).Scan(&clientID)

	req := httptest.NewRequest(http.MethodGet, "/leads/qr?client_id="+strconv.FormatInt(clientID, 10), nil)
	req.AddCookie(&http.Cookie{Name: "session", Value: sessionID})
	w := httptest.NewRecorder()

	LeadsQR(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", w.Code)
	}
}