package items

import (
	"os"
	"testing"

	"dk/internal/database"
)

func setupTestDB(t *testing.T) *database.DB {
	testDB := "test_items.db"
	t.Cleanup(func() {
		os.Remove(testDB)
	})

	db, err := database.Open(testDB)
	if err != nil {
		t.Fatalf("Failed to open test database: %v", err)
	}

	createTable := `CREATE TABLE items (
		id      INTEGER PRIMARY KEY AUTOINCREMENT,
		type    INTEGER NOT NULL DEFAULT 0,
		name    TEXT NOT NULL,
		value   INTEGER NOT NULL DEFAULT 0,
		att     INTEGER NOT NULL DEFAULT 0,
		special TEXT NOT NULL DEFAULT ''
	)`

	if err := db.Exec(createTable); err != nil {
		t.Fatalf("Failed to create items table: %v", err)
	}

	testItems := `INSERT INTO items (type, name, value, att, special) VALUES
		(1, 'Test Sword', 100, 10, 'strength,5'),
		(2, 'Test Armor', 200, 15, 'maxhp,25'),
		(3, 'Test Shield', 150, 8, '')`

	if err := db.Exec(testItems); err != nil {
		t.Fatalf("Failed to insert test items: %v", err)
	}

	return db
}

func TestFind(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	// Test finding existing item
	item, err := Find(db, 1)
	if err != nil {
		t.Fatalf("Failed to find item: %v", err)
	}

	if item.ID != 1 {
		t.Errorf("Expected ID 1, got %d", item.ID)
	}
	if item.Name != "Test Sword" {
		t.Errorf("Expected name 'Test Sword', got '%s'", item.Name)
	}
	if item.Type != TypeWeapon {
		t.Errorf("Expected type %d, got %d", TypeWeapon, item.Type)
	}
	if item.Value != 100 {
		t.Errorf("Expected value 100, got %d", item.Value)
	}
	if item.Att != 10 {
		t.Errorf("Expected att 10, got %d", item.Att)
	}
	if item.Special != "strength,5" {
		t.Errorf("Expected special 'strength,5', got '%s'", item.Special)
	}

	// Test finding non-existent item
	_, err = Find(db, 999)
	if err == nil {
		t.Error("Expected error when finding non-existent item")
	}
}

func TestAll(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	items, err := All(db)
	if err != nil {
		t.Fatalf("Failed to get all items: %v", err)
	}

	if len(items) != 3 {
		t.Errorf("Expected 3 items, got %d", len(items))
	}

	// Check first item
	if items[0].Name != "Test Sword" {
		t.Errorf("Expected first item to be 'Test Sword', got '%s'", items[0].Name)
	}
}

func TestByType(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	weapons, err := ByType(db, TypeWeapon)
	if err != nil {
		t.Fatalf("Failed to get weapons: %v", err)
	}

	if len(weapons) != 1 {
		t.Errorf("Expected 1 weapon, got %d", len(weapons))
	}

	if weapons[0].Name != "Test Sword" {
		t.Errorf("Expected weapon to be 'Test Sword', got '%s'", weapons[0].Name)
	}

	armor, err := ByType(db, TypeArmor)
	if err != nil {
		t.Fatalf("Failed to get armor: %v", err)
	}

	if len(armor) != 1 {
		t.Errorf("Expected 1 armor, got %d", len(armor))
	}
}

func TestBuilder(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	// Create new item using builder
	item, err := NewBuilder(db).
		WithType(TypeWeapon).
		WithName("Builder Sword").
		WithValue(500).
		WithAtt(25).
		WithSpecial("dexterity,10").
		Create()

	if err != nil {
		t.Fatalf("Failed to create item with builder: %v", err)
	}

	if item.ID == 0 {
		t.Error("Expected non-zero ID after creation")
	}
	if item.Name != "Builder Sword" {
		t.Errorf("Expected name 'Builder Sword', got '%s'", item.Name)
	}
	if item.Type != TypeWeapon {
		t.Errorf("Expected type %d, got %d", TypeWeapon, item.Type)
	}
	if item.Value != 500 {
		t.Errorf("Expected value 500, got %d", item.Value)
	}
	if item.Att != 25 {
		t.Errorf("Expected att 25, got %d", item.Att)
	}
	if item.Special != "dexterity,10" {
		t.Errorf("Expected special 'dexterity,10', got '%s'", item.Special)
	}

	// Verify it was saved to database
	foundItem, err := Find(db, item.ID)
	if err != nil {
		t.Fatalf("Failed to find created item: %v", err)
	}

	if foundItem.Name != "Builder Sword" {
		t.Errorf("Created item not found in database")
	}
}

func TestSave(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	item, err := Find(db, 1)
	if err != nil {
		t.Fatalf("Failed to find item: %v", err)
	}

	// Modify item
	item.Name = "Updated Sword"
	item.Value = 150

	// Save changes
	err = item.Save()
	if err != nil {
		t.Fatalf("Failed to save item: %v", err)
	}

	// Verify changes were saved
	updatedItem, err := Find(db, 1)
	if err != nil {
		t.Fatalf("Failed to find updated item: %v", err)
	}

	if updatedItem.Name != "Updated Sword" {
		t.Errorf("Expected updated name 'Updated Sword', got '%s'", updatedItem.Name)
	}
	if updatedItem.Value != 150 {
		t.Errorf("Expected updated value 150, got %d", updatedItem.Value)
	}
}

func TestDelete(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	item, err := Find(db, 1)
	if err != nil {
		t.Fatalf("Failed to find item: %v", err)
	}

	// Delete item
	err = item.Delete()
	if err != nil {
		t.Fatalf("Failed to delete item: %v", err)
	}

	// Verify item was deleted
	_, err = Find(db, 1)
	if err == nil {
		t.Error("Expected error when finding deleted item")
	}
}

func TestItemTypeMethods(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	sword, _ := Find(db, 1)
	armor, _ := Find(db, 2)
	shield, _ := Find(db, 3)

	// Test IsWeapon
	if !sword.IsWeapon() {
		t.Error("Expected sword to be weapon")
	}
	if armor.IsWeapon() {
		t.Error("Expected armor not to be weapon")
	}

	// Test IsArmor
	if !armor.IsArmor() {
		t.Error("Expected armor to be armor")
	}
	if sword.IsArmor() {
		t.Error("Expected sword not to be armor")
	}

	// Test IsShield
	if !shield.IsShield() {
		t.Error("Expected shield to be shield")
	}
	if sword.IsShield() {
		t.Error("Expected sword not to be shield")
	}

	// Test TypeName
	if sword.TypeName() != "Weapon" {
		t.Errorf("Expected sword type name 'Weapon', got '%s'", sword.TypeName())
	}
	if armor.TypeName() != "Armor" {
		t.Errorf("Expected armor type name 'Armor', got '%s'", armor.TypeName())
	}
	if shield.TypeName() != "Shield" {
		t.Errorf("Expected shield type name 'Shield', got '%s'", shield.TypeName())
	}
}