mockforge-registry-server 0.3.130

//! Database connection and models

use anyhow::Result;
use sqlx::{postgres::PgPoolOptions, PgPool};

#[derive(Clone, Debug)]
pub struct Database {
    pool: PgPool,
}

impl Database {
    pub async fn connect(database_url: &str) -> Result<Self> {
        // DATABASE_MAX_CONNECTIONS: Maximum number of database connections in the pool
        // Default: 20
        let max_connections: u32 = std::env::var("DATABASE_MAX_CONNECTIONS")
            .ok()
            .and_then(|s| s.parse().ok())
            .unwrap_or(20);

        let pool = PgPoolOptions::new()
            .max_connections(max_connections)
            .connect(database_url)
            .await?;

        Ok(Self { pool })
    }

    pub async fn migrate(&self) -> Result<()> {
        // Acquire a PostgreSQL advisory lock to prevent concurrent migration runs
        // across multiple replicas. Lock ID 8675309 is an arbitrary but stable identifier.
        const MIGRATION_LOCK_ID: i64 = 8675309;

        tracing::info!("Acquiring advisory lock for database migrations...");
        sqlx::query("SELECT pg_advisory_lock($1)")
            .bind(MIGRATION_LOCK_ID)
            .execute(&self.pool)
            .await?;
        tracing::info!("Advisory lock acquired, running migrations...");

        // Run migrations. Any error aborts boot — `sqlx::migrate!().run()` bails
        // on the *first* inconsistency without applying subsequent pending
        // migrations, so historically-permissive "warn and continue" handling
        // silently skipped everything past the gap and left the DB multiple
        // versions behind without surfacing a single error to operators. We'd
        // rather refuse to boot and have someone repair the `_sqlx_migrations`
        // table than crash-loop a worker that depends on a table that never
        // got created.
        let result =
            sqlx::migrate!("./migrations")
                .run(&self.pool)
                .await
                .map_err(|e| -> anyhow::Error {
                    if e.to_string().contains("previously applied but is missing") {
                        tracing::error!(
                            "sqlx refused to migrate: the DB's `_sqlx_migrations` table has an \
                         applied row whose matching file is missing from the repo. This \
                         blocks ALL subsequent migrations from running. To fix, either \
                         restore the missing file or remove the orphaned tracking row \
                         manually (psql: `DELETE FROM _sqlx_migrations WHERE version = …`). \
                         Full error: {:?}",
                            e
                        );
                    }
                    e.into()
                });

        // Release the advisory lock regardless of migration outcome
        if let Err(unlock_err) = sqlx::query("SELECT pg_advisory_unlock($1)")
            .bind(MIGRATION_LOCK_ID)
            .execute(&self.pool)
            .await
        {
            tracing::error!("Failed to release migration advisory lock: {}", unlock_err);
        } else {
            tracing::info!("Migration advisory lock released");
        }

        result
    }

    pub fn pool(&self) -> &PgPool {
        &self.pool
    }

    /// Get total number of plugins
    pub async fn get_total_plugins(&self) -> Result<i64> {
        let count: (i64,) =
            sqlx::query_as("SELECT COUNT(*) FROM plugins").fetch_one(&self.pool).await?;
        Ok(count.0)
    }

    /// Get total downloads across all plugins
    pub async fn get_total_downloads(&self) -> Result<i64> {
        // downloads_total is NUMERIC in database, so we need to cast it
        let total: (Option<i64>,) =
            sqlx::query_as("SELECT COALESCE(SUM(downloads_total)::BIGINT, 0) FROM plugins")
                .fetch_one(&self.pool)
                .await?;
        Ok(total.0.unwrap_or(0))
    }

    /// Get total number of users
    pub async fn get_total_users(&self) -> Result<i64> {
        let count: (i64,) =
            sqlx::query_as("SELECT COUNT(*) FROM users").fetch_one(&self.pool).await?;
        Ok(count.0)
    }

    // ==================== Token Revocation Functions ====================

    /// Store a refresh token JTI for tracking (called on token creation)
    pub async fn store_refresh_token_jti(
        &self,
        jti: &str,
        user_id: uuid::Uuid,
        expires_at: chrono::DateTime<chrono::Utc>,
    ) -> Result<()> {
        sqlx::query(
            r#"
            INSERT INTO token_revocations (jti, user_id, expires_at)
            VALUES ($1, $2, $3)
            ON CONFLICT (jti) DO NOTHING
            "#,
        )
        .bind(jti)
        .bind(user_id)
        .bind(expires_at)
        .execute(&self.pool)
        .await?;

        Ok(())
    }

    /// Check if a refresh token JTI has been revoked
    pub async fn is_token_revoked(&self, jti: &str) -> Result<bool> {
        let result: Option<(Option<chrono::DateTime<chrono::Utc>>,)> = sqlx::query_as(
            r#"
            SELECT revoked_at FROM token_revocations WHERE jti = $1
            "#,
        )
        .bind(jti)
        .fetch_optional(&self.pool)
        .await?;

        match result {
            // Token found and has a revoked_at timestamp = revoked
            Some((Some(_),)) => Ok(true),
            // Token found but no revoked_at timestamp = not revoked (active)
            Some((None,)) => Ok(false),
            // Token not found = treat as revoked (unknown tokens should be rejected)
            None => Ok(true),
        }
    }

    /// Revoke a refresh token JTI (called on logout or token refresh)
    pub async fn revoke_token(&self, jti: &str, reason: &str) -> Result<()> {
        sqlx::query(
            r#"
            UPDATE token_revocations
            SET revoked_at = NOW(), revocation_reason = $2
            WHERE jti = $1 AND revoked_at IS NULL
            "#,
        )
        .bind(jti)
        .bind(reason)
        .execute(&self.pool)
        .await?;

        Ok(())
    }

    /// Revoke all refresh tokens for a user (called on password change, security events)
    pub async fn revoke_all_user_tokens(&self, user_id: uuid::Uuid, reason: &str) -> Result<u64> {
        let result = sqlx::query(
            r#"
            UPDATE token_revocations
            SET revoked_at = NOW(), revocation_reason = $2
            WHERE user_id = $1 AND revoked_at IS NULL
            "#,
        )
        .bind(user_id)
        .bind(reason)
        .execute(&self.pool)
        .await?;

        Ok(result.rows_affected())
    }

    /// Clean up expired token revocation records (for maintenance)
    pub async fn cleanup_expired_tokens(&self) -> Result<u64> {
        let result = sqlx::query(
            r#"
            DELETE FROM token_revocations
            WHERE expires_at < NOW() - INTERVAL '1 day'
            "#,
        )
        .execute(&self.pool)
        .await?;

        Ok(result.rows_affected())
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_database_clone() {
        // Verify Database implements Clone
        fn requires_clone<T: Clone>() {}
        requires_clone::<Database>();
    }

    #[tokio::test]
    async fn test_database_connect() {
        // This test would require a real Postgres database
        // We can test that the function exists and has the right signature
        let database_url = "postgresql://test:test@localhost/test_db";

        // Attempt to connect (will fail without a real database, which is expected)
        let result = Database::connect(database_url).await;

        // We expect this to fail since we don't have a database running
        assert!(
            result.is_err(),
            "expected connection to fail without a running database, but got: {result:?}"
        );
    }

    #[test]
    fn test_database_pool_type() {
        // Verify that Database has the expected structure
        // This ensures the API surface is correct
        fn check_pool_method(_db: &Database) -> &PgPool {
            _db.pool()
        }

        // Verify the function has the expected signature (compile-time check)
        let _: fn(&Database) -> &PgPool = check_pool_method;
    }

    // Mock test to verify query structures
    #[test]
    fn test_total_plugins_query_structure() {
        let query = "SELECT COUNT(*) FROM plugins";

        // Verify basic query structure
        assert!(query.contains("SELECT"));
        assert!(query.contains("COUNT(*)"));
        assert!(query.contains("FROM plugins"));
    }

    #[test]
    fn test_total_downloads_query_structure() {
        let query = "SELECT COALESCE(SUM(downloads_total)::BIGINT, 0) FROM plugins";

        // Verify query structure
        assert!(query.contains("SELECT"));
        assert!(query.contains("COALESCE"));
        assert!(query.contains("SUM(downloads_total)"));
        assert!(query.contains("FROM plugins"));
        assert!(query.contains("::BIGINT"));
    }

    #[test]
    fn test_total_users_query_structure() {
        let query = "SELECT COUNT(*) FROM users";

        // Verify basic query structure
        assert!(query.contains("SELECT"));
        assert!(query.contains("COUNT(*)"));
        assert!(query.contains("FROM users"));
    }

    #[test]
    fn test_migration_error_handling() {
        // Verify the migration error message patterns
        let error_msg = "previously applied but is missing";

        assert!(error_msg.contains("previously applied"));
        assert!(error_msg.contains("missing"));
    }

    // Integration-style tests (require database, so we make them conditional)
    // These will be skipped in normal test runs but can be run with a test database

    #[tokio::test]
    #[ignore] // Requires database
    async fn test_database_migration() {
        // This test requires a real Postgres database
        let database_url = std::env::var("TEST_DATABASE_URL")
            .unwrap_or_else(|_| "postgresql://test:test@localhost/test_db".to_string());

        if let Ok(db) = Database::connect(&database_url).await {
            let result = db.migrate().await;
            // Migration should either succeed or fail gracefully
            assert!(result.is_ok() || result.is_err());
        }
    }

    #[tokio::test]
    #[ignore] // Requires database
    async fn test_get_total_plugins() {
        let database_url = std::env::var("TEST_DATABASE_URL")
            .unwrap_or_else(|_| "postgresql://test:test@localhost/test_db".to_string());

        if let Ok(db) = Database::connect(&database_url).await {
            let _ = db.migrate().await;

            let result = db.get_total_plugins().await;
            if let Ok(count) = result {
                assert!(count >= 0);
            }
        }
    }

    #[tokio::test]
    #[ignore] // Requires database
    async fn test_get_total_downloads() {
        let database_url = std::env::var("TEST_DATABASE_URL")
            .unwrap_or_else(|_| "postgresql://test:test@localhost/test_db".to_string());

        if let Ok(db) = Database::connect(&database_url).await {
            let _ = db.migrate().await;

            let result = db.get_total_downloads().await;
            if let Ok(count) = result {
                assert!(count >= 0);
            }
        }
    }

    #[tokio::test]
    #[ignore] // Requires database
    async fn test_get_total_users() {
        let database_url = std::env::var("TEST_DATABASE_URL")
            .unwrap_or_else(|_| "postgresql://test:test@localhost/test_db".to_string());

        if let Ok(db) = Database::connect(&database_url).await {
            let _ = db.migrate().await;

            let result = db.get_total_users().await;
            if let Ok(count) = result {
                assert!(count >= 0);
            }
        }
    }

    #[tokio::test]
    #[ignore] // Requires database
    async fn test_pool_reuse() {
        let database_url = std::env::var("TEST_DATABASE_URL")
            .unwrap_or_else(|_| "postgresql://test:test@localhost/test_db".to_string());

        if let Ok(db) = Database::connect(&database_url).await {
            // Get pool reference multiple times
            let pool1 = db.pool();
            let pool2 = db.pool();

            // Should return the same pool
            assert!(std::ptr::eq(pool1, pool2));
        }
    }

    #[test]
    fn test_database_connection_string_validation() {
        // Test various database URL formats
        let valid_urls = vec![
            "postgresql://user:pass@localhost/db",
            "postgresql://user:pass@localhost:5432/db",
            "postgresql://localhost/db",
            "postgres://user:pass@host:5432/database?sslmode=require",
        ];

        for url in valid_urls {
            assert!(url.starts_with("postgres"));
            assert!(url.contains("://"));
        }
    }

    #[test]
    fn test_max_connections_config() {
        // Verify the default max_connections value is reasonable
        let max_connections = 20; // Default value from DATABASE_MAX_CONNECTIONS env var

        assert!(max_connections > 0);
        assert!(max_connections <= 100); // Reasonable upper bound
    }

    #[tokio::test]
    #[ignore] // Requires database
    async fn test_migration_idempotency() {
        let database_url = std::env::var("TEST_DATABASE_URL")
            .unwrap_or_else(|_| "postgresql://test:test@localhost/test_db".to_string());

        if let Ok(db) = Database::connect(&database_url).await {
            // Run migrations twice
            let result1 = db.migrate().await;
            let result2 = db.migrate().await;

            // Both should succeed (migrations are idempotent)
            // Or both should handle the "already applied" case gracefully
            assert!(result1.is_ok() || result1.is_err());
            assert!(result2.is_ok() || result2.is_err());
        }
    }

    #[test]
    fn test_query_return_types() {
        // Verify that query return types are correct
        // This is a compile-time check that the types match expectations

        fn check_total_plugins_type(_: i64) {}
        fn check_total_downloads_type(_: i64) {}
        fn check_total_users_type(_: i64) {}

        // Verify the functions accept i64 (compile-time type check)
        let _: fn(i64) = check_total_plugins_type;
        let _: fn(i64) = check_total_downloads_type;
        let _: fn(i64) = check_total_users_type;
    }

    #[test]
    fn test_database_error_types() {
        // Verify error types are appropriate
        use anyhow::Result;

        fn returns_result() -> Result<()> {
            Ok(())
        }

        let result = returns_result();
        assert!(result.is_ok());
    }
}