use async_trait::async_trait;
use chrono::{DateTime, Utc};
use sqlx::PgPool;
use domain::{errors::DomainError, models::api_key::ApiKey, ports::ApiKeyRepository, value_objects::{ApiKeyId, UserId}};

pub struct PgApiKeyRepository { pool: PgPool }
impl PgApiKeyRepository { pub fn new(pool: PgPool) -> Self { Self { pool } } }

#[async_trait]
impl ApiKeyRepository for PgApiKeyRepository {
    async fn save(&self, k: &ApiKey) -> Result<(), DomainError> {
        sqlx::query("INSERT INTO api_keys(id,user_id,key_hash,name,created_at) VALUES($1,$2,$3,$4,$5)")
            .bind(k.id.as_uuid()).bind(k.user_id.as_uuid()).bind(&k.key_hash).bind(&k.name).bind(k.created_at)
            .execute(&self.pool).await.map_err(|e| DomainError::Internal(e.to_string())).map(|_| ())
    }

    async fn find_by_hash(&self, hash: &str) -> Result<Option<ApiKey>, DomainError> {
        #[derive(sqlx::FromRow)] struct Row { id: uuid::Uuid, user_id: uuid::Uuid, key_hash: String, name: String, created_at: DateTime<Utc> }
        sqlx::query_as::<_, Row>("SELECT id,user_id,key_hash,name,created_at FROM api_keys WHERE key_hash=$1")
            .bind(hash).fetch_optional(&self.pool).await
            .map_err(|e| DomainError::Internal(e.to_string()))
            .map(|o| o.map(|r| ApiKey { id: ApiKeyId::from_uuid(r.id), user_id: UserId::from_uuid(r.user_id), key_hash: r.key_hash, name: r.name, created_at: r.created_at }))
    }

    async fn list_for_user(&self, user_id: &UserId) -> Result<Vec<ApiKey>, DomainError> {
        #[derive(sqlx::FromRow)] struct Row { id: uuid::Uuid, user_id: uuid::Uuid, key_hash: String, name: String, created_at: DateTime<Utc> }
        sqlx::query_as::<_, Row>("SELECT id,user_id,key_hash,name,created_at FROM api_keys WHERE user_id=$1 ORDER BY created_at DESC")
            .bind(user_id.as_uuid()).fetch_all(&self.pool).await
            .map_err(|e| DomainError::Internal(e.to_string()))
            .map(|rows| rows.into_iter().map(|r| ApiKey { id: ApiKeyId::from_uuid(r.id), user_id: UserId::from_uuid(r.user_id), key_hash: r.key_hash, name: r.name, created_at: r.created_at }).collect())
    }

    async fn delete(&self, id: &ApiKeyId, user_id: &UserId) -> Result<(), DomainError> {
        sqlx::query("DELETE FROM api_keys WHERE id=$1 AND user_id=$2")
            .bind(id.as_uuid()).bind(user_id.as_uuid())
            .execute(&self.pool).await.map_err(|e| DomainError::Internal(e.to_string())).map(|_| ())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use chrono::Utc;
    use domain::{models::user::User, value_objects::*};
    use crate::user::PgUserRepository;
    use domain::ports::UserRepository;

    async fn seed_user(pool: &sqlx::PgPool) -> User {
        let repo = PgUserRepository::new(pool.clone());
        let u = User::new_local(UserId::new(), Username::new("alice").unwrap(), Email::new("alice@ex.com").unwrap(), PasswordHash("h".into()));
        repo.save(&u).await.unwrap(); u
    }

    #[sqlx::test(migrations = "./migrations")]
    async fn save_and_find_by_hash(pool: sqlx::PgPool) {
        let user = seed_user(&pool).await;
        let repo = PgApiKeyRepository::new(pool);
        let key = ApiKey { id: ApiKeyId::new(), user_id: user.id.clone(), key_hash: "abc123".into(), name: "test".into(), created_at: Utc::now() };
        repo.save(&key).await.unwrap();
        let found = repo.find_by_hash("abc123").await.unwrap().unwrap();
        assert_eq!(found.name, "test");
    }

    #[sqlx::test(migrations = "./migrations")]
    async fn delete_key(pool: sqlx::PgPool) {
        let user = seed_user(&pool).await;
        let repo = PgApiKeyRepository::new(pool);
        let key = ApiKey { id: ApiKeyId::new(), user_id: user.id.clone(), key_hash: "def456".into(), name: "key2".into(), created_at: Utc::now() };
        repo.save(&key).await.unwrap();
        repo.delete(&key.id, &user.id).await.unwrap();
        assert!(repo.find_by_hash("def456").await.unwrap().is_none());
    }
}