package storage

import (
	"context"
	"path/filepath"
	"testing"
	"time"
)

func newTestStore(t *testing.T) *SQLiteStore {
	t.Helper()
	dbPath := filepath.Join(t.TempDir(), "test.db")
	store, err := NewSQLiteStore(dbPath)
	if err != nil {
		t.Fatalf("creating store: %v", err)
	}
	t.Cleanup(func() { store.Close() })
	return store
}

func TestRecordLoginAttempt(t *testing.T) {
	store := newTestStore(t)
	ctx := context.Background()

	// First attempt creates a new record.
	if err := store.RecordLoginAttempt(ctx, "root", "toor", "10.0.0.1", ""); err != nil {
		t.Fatalf("first attempt: %v", err)
	}

	// Second attempt with same credentials increments count.
	if err := store.RecordLoginAttempt(ctx, "root", "toor", "10.0.0.1", ""); err != nil {
		t.Fatalf("second attempt: %v", err)
	}

	// Different IP is a separate record.
	if err := store.RecordLoginAttempt(ctx, "root", "toor", "10.0.0.2", ""); err != nil {
		t.Fatalf("different IP: %v", err)
	}

	// Verify counts.
	var count int
	err := store.db.QueryRow(`SELECT count FROM login_attempts WHERE username = 'root' AND password = 'toor' AND ip = '10.0.0.1'`).Scan(&count)
	if err != nil {
		t.Fatalf("query: %v", err)
	}
	if count != 2 {
		t.Errorf("count = %d, want 2", count)
	}

	// Verify total rows.
	var total int
	err = store.db.QueryRow(`SELECT COUNT(*) FROM login_attempts`).Scan(&total)
	if err != nil {
		t.Fatalf("query total: %v", err)
	}
	if total != 2 {
		t.Errorf("total rows = %d, want 2", total)
	}
}

func TestCreateAndEndSession(t *testing.T) {
	store := newTestStore(t)
	ctx := context.Background()

	id, err := store.CreateSession(ctx, "10.0.0.1", "root", "", "")
	if err != nil {
		t.Fatalf("creating session: %v", err)
	}
	if id == "" {
		t.Fatal("session ID is empty")
	}

	// Verify session exists.
	var username string
	err = store.db.QueryRow(`SELECT username FROM sessions WHERE id = ?`, id).Scan(&username)
	if err != nil {
		t.Fatalf("query session: %v", err)
	}
	if username != "root" {
		t.Errorf("username = %q, want %q", username, "root")
	}

	// End session.
	now := time.Now()
	if err := store.EndSession(ctx, id, now); err != nil {
		t.Fatalf("ending session: %v", err)
	}

	var disconnectedAt string
	err = store.db.QueryRow(`SELECT disconnected_at FROM sessions WHERE id = ?`, id).Scan(&disconnectedAt)
	if err != nil {
		t.Fatalf("query disconnected_at: %v", err)
	}
	if disconnectedAt == "" {
		t.Error("disconnected_at is empty after EndSession")
	}
}

func TestUpdateHumanScore(t *testing.T) {
	store := newTestStore(t)
	ctx := context.Background()

	id, err := store.CreateSession(ctx, "10.0.0.1", "root", "", "")
	if err != nil {
		t.Fatalf("creating session: %v", err)
	}

	if err := store.UpdateHumanScore(ctx, id, 0.85); err != nil {
		t.Fatalf("updating score: %v", err)
	}

	var score float64
	err = store.db.QueryRow(`SELECT human_score FROM sessions WHERE id = ?`, id).Scan(&score)
	if err != nil {
		t.Fatalf("query score: %v", err)
	}
	if score != 0.85 {
		t.Errorf("score = %f, want 0.85", score)
	}
}

func TestAppendSessionLog(t *testing.T) {
	store := newTestStore(t)
	ctx := context.Background()

	id, err := store.CreateSession(ctx, "10.0.0.1", "root", "", "")
	if err != nil {
		t.Fatalf("creating session: %v", err)
	}

	if err := store.AppendSessionLog(ctx, id, "ls -la", ""); err != nil {
		t.Fatalf("append log: %v", err)
	}
	if err := store.AppendSessionLog(ctx, id, "", "total 4\ndrwxr-xr-x"); err != nil {
		t.Fatalf("append log output: %v", err)
	}

	var count int
	err = store.db.QueryRow(`SELECT COUNT(*) FROM session_logs WHERE session_id = ?`, id).Scan(&count)
	if err != nil {
		t.Fatalf("query logs: %v", err)
	}
	if count != 2 {
		t.Errorf("log count = %d, want 2", count)
	}
}

func TestDeleteRecordsBefore(t *testing.T) {
	store := newTestStore(t)
	ctx := context.Background()

	// Insert an old login attempt.
	oldTime := time.Now().AddDate(0, 0, -100).UTC().Format(time.RFC3339)
	_, err := store.db.Exec(`
		INSERT INTO login_attempts (username, password, ip, count, first_seen, last_seen)
		VALUES ('old', 'old', '1.1.1.1', 1, ?, ?)`, oldTime, oldTime)
	if err != nil {
		t.Fatalf("insert old attempt: %v", err)
	}

	// Insert a recent login attempt.
	if err := store.RecordLoginAttempt(ctx, "new", "new", "2.2.2.2", ""); err != nil {
		t.Fatalf("insert recent attempt: %v", err)
	}

	// Insert an old session with a log entry.
	_, err = store.db.Exec(`
		INSERT INTO sessions (id, ip, username, shell_name, connected_at)
		VALUES ('old-session', '1.1.1.1', 'old', '', ?)`, oldTime)
	if err != nil {
		t.Fatalf("insert old session: %v", err)
	}
	_, err = store.db.Exec(`
		INSERT INTO session_logs (session_id, timestamp, input, output)
		VALUES ('old-session', ?, 'ls', '')`, oldTime)
	if err != nil {
		t.Fatalf("insert old log: %v", err)
	}

	// Insert a recent session.
	if _, err := store.CreateSession(ctx, "2.2.2.2", "new", "", ""); err != nil {
		t.Fatalf("insert recent session: %v", err)
	}

	// Delete records older than 30 days.
	cutoff := time.Now().AddDate(0, 0, -30)
	deleted, err := store.DeleteRecordsBefore(ctx, cutoff)
	if err != nil {
		t.Fatalf("delete: %v", err)
	}
	if deleted != 3 {
		t.Errorf("deleted = %d, want 3 (1 attempt + 1 session + 1 log)", deleted)
	}

	// Verify recent records remain.
	var count int
	store.db.QueryRow(`SELECT COUNT(*) FROM login_attempts`).Scan(&count)
	if count != 1 {
		t.Errorf("remaining attempts = %d, want 1", count)
	}
	store.db.QueryRow(`SELECT COUNT(*) FROM sessions`).Scan(&count)
	if count != 1 {
		t.Errorf("remaining sessions = %d, want 1", count)
	}
}

func TestNewSQLiteStoreCreatesFile(t *testing.T) {
	dbPath := filepath.Join(t.TempDir(), "test.db")
	store, err := NewSQLiteStore(dbPath)
	if err != nil {
		t.Fatalf("creating store: %v", err)
	}
	defer store.Close()

	// Verify we can use the store.
	ctx := context.Background()
	if err := store.RecordLoginAttempt(ctx, "test", "test", "127.0.0.1", ""); err != nil {
		t.Fatalf("recording attempt: %v", err)
	}
}