//! SQLite 数据库存储测试

use rust_user_api::{
    models::user::User,
    storage::{database::DatabaseUserStore, UserStore},
    utils::errors::ApiError,
};
use uuid::Uuid;
use chrono::Utc;
use tempfile::tempdir;

/// 创建临时数据库用于测试
async fn create_test_database() -> Result<DatabaseUserStore, ApiError> {
    // 使用内存数据库避免文件系统问题
    let database_url = "sqlite::memory:";
    DatabaseUserStore::from_url(database_url).await
}

/// 创建测试用户
fn create_test_user() -> User {
    User {
        id: Uuid::new_v4(),
        username: "testuser".to_string(),
        email: "test@example.com".to_string(),
        password_hash: "hashed_password".to_string(),
        created_at: Utc::now(),
        updated_at: Utc::now(),
    }
}

#[tokio::test]
async fn test_database_connection_and_initialization() {
    let store = create_test_database().await;
    assert!(store.is_ok(), "Failed to create database store");
}

#[tokio::test]
async fn test_database_create_user() {
    let store = create_test_database().await.unwrap();
    let user = create_test_user();
    
    let result = store.create_user(user.clone()).await;
    assert!(result.is_ok(), "Failed to create user: {:?}", result.err());
    
    let created_user = result.unwrap();
    assert_eq!(created_user.username, user.username);
    assert_eq!(created_user.email, user.email);
    assert_eq!(created_user.id, user.id);
}

#[tokio::test]
async fn test_database_get_user_by_id() {
    let store = create_test_database().await.unwrap();
    let user = create_test_user();
    let user_id = user.id;
    
    // 先创建用户
    store.create_user(user.clone()).await.unwrap();
    
    // 然后获取用户
    let result = store.get_user(&user_id).await;
    assert!(result.is_ok(), "Failed to get user: {:?}", result.err());
    
    let retrieved_user = result.unwrap();
    assert!(retrieved_user.is_some(), "User not found");
    
    let retrieved_user = retrieved_user.unwrap();
    assert_eq!(retrieved_user.id, user_id);
    assert_eq!(retrieved_user.username, user.username);
    assert_eq!(retrieved_user.email, user.email);
}

#[tokio::test]
async fn test_database_get_user_by_username() {
    let store = create_test_database().await.unwrap();
    let user = create_test_user();
    let username = user.username.clone();
    
    // 先创建用户
    store.create_user(user.clone()).await.unwrap();
    
    // 然后按用户名获取用户
    let result = store.get_user_by_username(&username).await;
    assert!(result.is_ok(), "Failed to get user by username: {:?}", result.err());
    
    let retrieved_user = result.unwrap();
    assert!(retrieved_user.is_some(), "User not found by username");
    
    let retrieved_user = retrieved_user.unwrap();
    assert_eq!(retrieved_user.username, username);
    assert_eq!(retrieved_user.id, user.id);
}

#[tokio::test]
async fn test_database_list_users() {
    let store = create_test_database().await.unwrap();
    
    // 创建多个用户
    let user1 = User {
        id: Uuid::new_v4(),
        username: "user1".to_string(),
        email: "user1@example.com".to_string(),
        password_hash: "hashed_password1".to_string(),
        created_at: Utc::now(),
        updated_at: Utc::now(),
    };
    
    let user2 = User {
        id: Uuid::new_v4(),
        username: "user2".to_string(),
        email: "user2@example.com".to_string(),
        password_hash: "hashed_password2".to_string(),
        created_at: Utc::now(),
        updated_at: Utc::now(),
    };
    
    store.create_user(user1.clone()).await.unwrap();
    store.create_user(user2.clone()).await.unwrap();
    
    // 获取所有用户
    let result = store.list_users().await;
    assert!(result.is_ok(), "Failed to list users: {:?}", result.err());
    
    let users = result.unwrap();
    assert_eq!(users.len(), 2, "Expected 2 users, got {}", users.len());
    
    // 验证用户存在
    let usernames: Vec<String> = users.iter().map(|u| u.username.clone()).collect();
    assert!(usernames.contains(&"user1".to_string()));
    assert!(usernames.contains(&"user2".to_string()));
}

#[tokio::test]
async fn test_database_update_user() {
    let store = create_test_database().await.unwrap();
    let mut user = create_test_user();
    let user_id = user.id;
    
    // 先创建用户
    store.create_user(user.clone()).await.unwrap();
    
    // 更新用户信息
    user.username = "updated_user".to_string();
    user.email = "updated@example.com".to_string();
    user.updated_at = Utc::now();
    
    let result = store.update_user(&user_id, user.clone()).await;
    assert!(result.is_ok(), "Failed to update user: {:?}", result.err());
    
    let updated_user = result.unwrap();
    assert!(updated_user.is_some(), "Updated user not returned");
    
    let updated_user = updated_user.unwrap();
    assert_eq!(updated_user.username, "updated_user");
    assert_eq!(updated_user.email, "updated@example.com");
    
    // 验证数据库中的用户确实被更新了
    let retrieved_user = store.get_user(&user_id).await.unwrap().unwrap();
    assert_eq!(retrieved_user.username, "updated_user");
    assert_eq!(retrieved_user.email, "updated@example.com");
}

#[tokio::test]
async fn test_database_delete_user() {
    let store = create_test_database().await.unwrap();
    let user = create_test_user();
    let user_id = user.id;
    
    // 先创建用户
    store.create_user(user.clone()).await.unwrap();
    
    // 验证用户存在
    let user_exists = store.get_user(&user_id).await.unwrap();
    assert!(user_exists.is_some(), "User should exist before deletion");
    
    // 删除用户
    let result = store.delete_user(&user_id).await;
    assert!(result.is_ok(), "Failed to delete user: {:?}", result.err());
    assert!(result.unwrap(), "Delete operation should return true");
    
    // 验证用户已被删除
    let user_after_delete = store.get_user(&user_id).await.unwrap();
    assert!(user_after_delete.is_none(), "User should not exist after deletion");
}

#[tokio::test]
async fn test_database_duplicate_username_constraint() {
    let store = create_test_database().await.unwrap();
    
    let user1 = User {
        id: Uuid::new_v4(),
        username: "duplicate_test".to_string(),
        email: "test1@example.com".to_string(),
        password_hash: "hashed_password1".to_string(),
        created_at: Utc::now(),
        updated_at: Utc::now(),
    };
    
    let user2 = User {
        id: Uuid::new_v4(),
        username: "duplicate_test".to_string(), // 相同用户名
        email: "test2@example.com".to_string(),
        password_hash: "hashed_password2".to_string(),
        created_at: Utc::now(),
        updated_at: Utc::now(),
    };
    
    // 创建第一个用户应该成功
    let result1 = store.create_user(user1).await;
    assert!(result1.is_ok(), "First user creation should succeed");
    
    // 创建第二个用户应该失败（用户名重复）
    let result2 = store.create_user(user2).await;
    assert!(result2.is_err(), "Second user creation should fail due to duplicate username");
    
    if let Err(ApiError::Conflict(msg)) = result2 {
        assert!(msg.contains("用户名已存在"), "Error message should mention duplicate username");
    } else {
        panic!("Expected Conflict error for duplicate username, got: {:?}", result2);
    }
}

#[tokio::test]
async fn test_database_nonexistent_user_operations() {
    let store = create_test_database().await.unwrap();
    let nonexistent_id = Uuid::new_v4();
    
    // 获取不存在的用户
    let result = store.get_user(&nonexistent_id).await;
    assert!(result.is_ok(), "Getting nonexistent user should not error");
    assert!(result.unwrap().is_none(), "Nonexistent user should return None");
    
    // 按用户名获取不存在的用户
    let result = store.get_user_by_username("nonexistent_user").await;
    assert!(result.is_ok(), "Getting nonexistent user by username should not error");
    assert!(result.unwrap().is_none(), "Nonexistent user should return None");
    
    // 更新不存在的用户
    let fake_user = create_test_user();
    let result = store.update_user(&nonexistent_id, fake_user).await;
    assert!(result.is_ok(), "Updating nonexistent user should not error");
    assert!(result.unwrap().is_none(), "Updating nonexistent user should return None");
    
    // 删除不存在的用户
    let result = store.delete_user(&nonexistent_id).await;
    assert!(result.is_ok(), "Deleting nonexistent user should not error");
    assert!(!result.unwrap(), "Deleting nonexistent user should return false");
}

#[tokio::test]
async fn test_database_data_persistence() {
    let temp_dir = tempdir().expect("Failed to create temp directory");
    let db_path = temp_dir.path().join("persistence_test.db");
    let database_url = format!("sqlite://{}?mode=rwc", db_path.display());
    
    let user = create_test_user();
    let user_id = user.id;
    
    // 第一次连接：创建用户
    {
        let store = DatabaseUserStore::from_url(&database_url).await.unwrap();
        store.create_user(user.clone()).await.unwrap();
    }
    
    // 第二次连接：验证用户仍然存在
    {
        let store = DatabaseUserStore::from_url(&database_url).await.unwrap();
        let retrieved_user = store.get_user(&user_id).await.unwrap();
        assert!(retrieved_user.is_some(), "User should persist across connections");
        
        let retrieved_user = retrieved_user.unwrap();
        assert_eq!(retrieved_user.username, user.username);
        assert_eq!(retrieved_user.email, user.email);
    }
}