use sqlx::Row as _;

#[tokio::test]
async fn connect_creates_parent_directory_and_migrate_is_idempotent() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let db_path = dir.path().join("nested").join("fabro.sqlite3");

    let database = fabro_db::Database::connect(&db_path).await?;
    database.migrate().await?;
    database.migrate().await?;
    database.health_check().await?;

    assert!(db_path.exists());
    #[cfg(unix)]
    {
        use std::os::unix::fs::PermissionsExt as _;

        for path in [
            db_path.clone(),
            db_path.with_extension("sqlite3-wal"),
            db_path.with_extension("sqlite3-shm"),
        ] {
            assert_eq!(
                std::fs::metadata(&path)?.permissions().mode() & 0o777,
                0o600,
                "{} should be private",
                path.display()
            );
        }
    }
    let variable_table_count: i64 = sqlx::query_scalar(
        "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'variables'",
    )
    .fetch_one(database.pool())
    .await?;
    assert_eq!(variable_table_count, 1);

    let environments_table_count: i64 = sqlx::query_scalar(
        "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'environments'",
    )
    .fetch_one(database.pool())
    .await?;
    assert_eq!(environments_table_count, 1);

    let secrets_table_count: i64 = sqlx::query_scalar(
        "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'secrets'",
    )
    .fetch_one(database.pool())
    .await?;
    assert_eq!(secrets_table_count, 1);

    let mcp_servers_table_count: i64 = sqlx::query_scalar(
        "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'mcp_servers'",
    )
    .fetch_one(database.pool())
    .await?;
    assert_eq!(mcp_servers_table_count, 1);

    for table in ["automations", "automation_triggers"] {
        let count: i64 = sqlx::query_scalar(
            "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = ?",
        )
        .bind(table)
        .fetch_one(database.pool())
        .await?;
        assert_eq!(count, 1, "{table} table should exist");
    }

    let runs_table_count: i64 = sqlx::query_scalar(
        "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'runs'",
    )
    .fetch_one(database.pool())
    .await?;
    assert_eq!(runs_table_count, 1);

    let legacy_import_table_count: i64 = sqlx::query_scalar(
        "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'legacy_imports'",
    )
    .fetch_one(database.pool())
    .await?;
    assert_eq!(legacy_import_table_count, 0);

    let foreign_keys: i64 = sqlx::query("PRAGMA foreign_keys")
        .fetch_one(database.pool())
        .await?
        .get(0);
    assert_eq!(foreign_keys, 1);

    Ok(())
}

#[tokio::test]
async fn mcp_servers_schema_rejects_invalid_transport_rows() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let database = fabro_db::Database::connect(dir.path().join("fabro.sqlite3")).await?;
    database.migrate().await?;

    insert_mcp_server(
        database.pool(),
        "stdio",
        "stdio",
        None,
        Some(r#"["server"]"#),
        None,
        None,
        Some("{}"),
        None,
    )
    .await?;
    insert_mcp_server(
        database.pool(),
        "http",
        "http",
        Some("streamable_http"),
        None,
        Some("https://example.com/mcp"),
        None,
        None,
        Some("{}"),
    )
    .await?;
    insert_mcp_server(
        database.pool(),
        "sandbox",
        "sandbox",
        Some("sse"),
        Some(r#"["server"]"#),
        None,
        Some(3000),
        Some("{}"),
        None,
    )
    .await?;

    for result in [
        insert_mcp_server(
            database.pool(),
            "bad-id_",
            "stdio",
            None,
            Some(r#"["server"]"#),
            None,
            None,
            Some("{}"),
            None,
        )
        .await,
        insert_mcp_server(
            database.pool(),
            "empty-command",
            "stdio",
            None,
            Some("[]"),
            None,
            None,
            Some("{}"),
            None,
        )
        .await,
        insert_mcp_server(
            database.pool(),
            "http-with-env",
            "http",
            Some("streamable_http"),
            None,
            Some("https://example.com/mcp"),
            None,
            Some("{}"),
            Some("{}"),
        )
        .await,
        insert_mcp_server(
            database.pool(),
            "sandbox-port",
            "sandbox",
            Some("streamable_http"),
            Some(r#"["server"]"#),
            None,
            Some(65_536),
            Some("{}"),
            None,
        )
        .await,
    ] {
        assert!(result.is_err(), "invalid MCP server row should be rejected");
    }

    Ok(())
}

#[expect(
    clippy::too_many_arguments,
    reason = "schema test helper mirrors the mutually exclusive transport columns"
)]
async fn insert_mcp_server(
    pool: &fabro_db::DbPool,
    id: &str,
    transport_type: &str,
    protocol: Option<&str>,
    command_json: Option<&str>,
    url: Option<&str>,
    port: Option<i64>,
    env_json: Option<&str>,
    headers_json: Option<&str>,
) -> Result<(), sqlx::Error> {
    sqlx::query(
        r"
        INSERT INTO mcp_servers (
            id,
            revision,
            display_name,
            transport_type,
            protocol,
            command_json,
            url,
            port,
            env_json,
            headers_json,
            startup_timeout_secs,
            tool_timeout_secs
        )
        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
        ",
    )
    .bind(id)
    .bind("a".repeat(64))
    .bind("MCP Server")
    .bind(transport_type)
    .bind(protocol)
    .bind(command_json)
    .bind(url)
    .bind(port)
    .bind(env_json)
    .bind(headers_json)
    .bind(10_i64)
    .bind(60_i64)
    .execute(pool)
    .await?;
    Ok(())
}

#[tokio::test]
async fn automations_schema_enforces_aggregate_constraints() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let database = fabro_db::Database::connect(dir.path().join("fabro.sqlite3")).await?;
    database.migrate().await?;

    insert_minimal_automation(database.pool(), "valid", 1).await?;
    sqlx::query(
        "INSERT INTO automation_triggers (automation_id, id, enabled, expression) \
         VALUES (?, ?, ?, ?)",
    )
    .bind("valid")
    .bind("nightly")
    .bind(true)
    .bind("0 3 * * *")
    .execute(database.pool())
    .await?;

    assert!(
        insert_minimal_automation(database.pool(), "Bad", 1)
            .await
            .is_err()
    );
    assert!(
        insert_minimal_automation(database.pool(), "bad-bool", 2_i64)
            .await
            .is_err()
    );
    assert!(
        sqlx::query(
            "INSERT INTO automation_triggers (automation_id, id, enabled, expression) \
             VALUES (?, ?, ?, ?)",
        )
        .bind("valid")
        .bind("Bad!")
        .bind(true)
        .bind("0 4 * * *")
        .execute(database.pool())
        .await
        .is_err()
    );
    assert!(
        sqlx::query(
            "INSERT INTO automation_triggers (automation_id, id, enabled, expression) \
             VALUES (?, ?, ?, ?)",
        )
        .bind("missing")
        .bind("nightly")
        .bind(true)
        .bind("0 4 * * *")
        .execute(database.pool())
        .await
        .is_err()
    );

    sqlx::query("DELETE FROM automations WHERE id = ?")
        .bind("valid")
        .execute(database.pool())
        .await?;
    let trigger_count: i64 =
        sqlx::query_scalar("SELECT COUNT(*) FROM automation_triggers WHERE automation_id = ?")
            .bind("valid")
            .fetch_one(database.pool())
            .await?;
    assert_eq!(trigger_count, 0);

    Ok(())
}

async fn insert_minimal_automation(
    pool: &fabro_db::DbPool,
    id: &str,
    api_enabled: i64,
) -> Result<(), sqlx::Error> {
    sqlx::query(
        r"
        INSERT INTO automations (
            id,
            revision,
            name,
            api_enabled,
            target_repository,
            target_ref,
            target_workflow
        ) VALUES (?, ?, ?, ?, ?, ?, ?)
        ",
    )
    .bind(id)
    .bind("a".repeat(64))
    .bind("Automation")
    .bind(api_enabled)
    .bind("fabro-sh/fabro")
    .bind("main")
    .bind("release")
    .execute(pool)
    .await?;
    Ok(())
}

#[tokio::test]
async fn runs_schema_creates_indexes_and_rejects_invalid_rows() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let database = fabro_db::Database::connect(dir.path().join("fabro.sqlite3")).await?;
    database.migrate().await?;

    let index_count: i64 = sqlx::query_scalar(
        "SELECT COUNT(*) FROM sqlite_master WHERE type = 'index' AND name LIKE 'runs_by_%'",
    )
    .fetch_one(database.pool())
    .await?;
    assert_eq!(index_count, 5);

    insert_minimal_run(database.pool(), "submitted", 0, r#"{"id":"run"}"#).await?;
    for (status, input_tokens, summary_json) in [
        ("unknown", 0, r#"{"id":"run-2"}"#),
        ("submitted", -1, r#"{"id":"run-3"}"#),
        ("submitted", 0, "not-json"),
    ] {
        assert!(
            insert_minimal_run(database.pool(), status, input_tokens, summary_json)
                .await
                .is_err()
        );
    }

    Ok(())
}

async fn insert_minimal_run(
    pool: &fabro_db::DbPool,
    status: &str,
    input_tokens: i64,
    summary_json: &str,
) -> Result<(), sqlx::Error> {
    sqlx::query(
        r"
INSERT INTO runs (
    id, source_last_seq, created_at_ms, last_event_at_ms, status, title,
    input_tokens, summary_json
) VALUES (?, 1, 0, 0, ?, 'title', ?, ?)
",
    )
    .bind(format!("run-{status}-{input_tokens}"))
    .bind(status)
    .bind(input_tokens)
    .bind(summary_json)
    .execute(pool)
    .await?;
    Ok(())
}

#[tokio::test]
async fn environments_schema_rejects_invalid_rows() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let database = fabro_db::Database::connect(dir.path().join("fabro.sqlite3")).await?;
    database.migrate().await?;

    insert_minimal_environment(database.pool(), "valid", "docker", "allow_all").await?;

    for (id, provider, network_mode) in [
        ("Bad", "docker", "allow_all"),
        ("local", "docker", "allow_all"),
        ("bad-provider", "bogus", "allow_all"),
        ("bad-network", "docker", "bogus"),
    ] {
        let result = insert_minimal_environment(database.pool(), id, provider, network_mode).await;
        assert!(
            result.is_err(),
            "environment row should be rejected: id={id}, provider={provider}, network_mode={network_mode}"
        );
    }

    Ok(())
}

async fn insert_minimal_environment(
    pool: &fabro_db::DbPool,
    id: &str,
    provider: &str,
    network_mode: &str,
) -> Result<(), sqlx::Error> {
    sqlx::query(
        r"
        INSERT INTO environments (
            id,
            revision,
            provider,
            network_mode,
            lifecycle_preserve,
            lifecycle_stop_on_terminal
        )
        VALUES (?, ?, ?, ?, ?, ?)
        ",
    )
    .bind(id)
    .bind("a".repeat(64))
    .bind(provider)
    .bind(network_mode)
    .bind(false)
    .bind(true)
    .execute(pool)
    .await?;

    Ok(())
}

#[tokio::test]
async fn variables_schema_enforces_env_style_names() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let database = fabro_db::Database::connect(dir.path().join("fabro.sqlite3")).await?;
    database.migrate().await?;

    sqlx::query("INSERT INTO variables (name, value, created_at, updated_at) VALUES (?, ?, ?, ?)")
        .bind("OK_123")
        .bind("")
        .bind("2026-06-30T00:00:00Z")
        .bind("2026-06-30T00:00:00Z")
        .execute(database.pool())
        .await?;

    let invalid = sqlx::query(
        "INSERT INTO variables (name, value, created_at, updated_at) VALUES (?, ?, ?, ?)",
    )
    .bind("1BAD")
    .bind("value")
    .bind("2026-06-30T00:00:00Z")
    .bind("2026-06-30T00:00:00Z")
    .execute(database.pool())
    .await;
    assert!(invalid.is_err());

    Ok(())
}

#[tokio::test]
async fn fresh_database_migrate_takes_no_snapshot() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let db_path = dir.path().join("fabro.sqlite3");

    let database = fabro_db::Database::connect(&db_path).await?;
    database.migrate().await?;

    assert!(
        !fabro_db::pre_migration_snapshot_path(&db_path).exists(),
        "a fresh database has no pre-migration state worth snapshotting"
    );
    Ok(())
}

// Simulates a binary upgrade: a database whose `_sqlx_migrations` table is
// missing an entry for a bundled migration is exactly what an older binary
// leaves behind for a newer one. The environments migration is pure CREATE
// TABLE, so dropping the table and deleting its version row makes it pending
// again without violating checksums.
#[tokio::test]
async fn migrate_snapshots_database_before_applying_new_migrations() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    let db_path = dir.path().join("fabro.sqlite3");
    let snapshot_path = fabro_db::pre_migration_snapshot_path(&db_path);

    let database = fabro_db::Database::connect(&db_path).await?;
    database.migrate().await?;
    sqlx::query(
        "INSERT INTO variables (name, value, created_at, updated_at) \
         VALUES ('SNAPSHOT_MARKER', 'kept', '2026-07-22T00:00:00Z', '2026-07-22T00:00:00Z')",
    )
    .execute(database.pool())
    .await?;
    sqlx::query("DROP TABLE environments")
        .execute(database.pool())
        .await?;
    sqlx::query("DELETE FROM _sqlx_migrations WHERE version = 2026063002")
        .execute(database.pool())
        .await?;

    database.migrate().await?;

    assert!(
        snapshot_path.exists(),
        "pending migration must snapshot first"
    );
    let snapshot = connect_read_only(&snapshot_path).await?;
    assert!(
        !table_exists(&snapshot, "environments").await?,
        "snapshot must hold the pre-migration schema"
    );
    let snapshot_marker: i64 =
        sqlx::query_scalar("SELECT COUNT(*) FROM variables WHERE name = 'SNAPSHOT_MARKER'")
            .fetch_one(&snapshot)
            .await?;
    assert_eq!(snapshot_marker, 1, "snapshot must preserve row data");
    snapshot.close().await;

    assert!(
        table_exists(database.pool(), "environments").await?,
        "migration must still apply"
    );

    #[cfg(unix)]
    {
        use std::os::unix::fs::PermissionsExt;
        let mode = std::fs::metadata(&snapshot_path)?.permissions().mode() & 0o777;
        assert_eq!(mode, 0o600, "snapshot must be private");
    }

    // With nothing pending, migrate must not rewrite the snapshot: it still
    // holds the state from before the most recent schema change.
    database.migrate().await?;
    let snapshot = connect_read_only(&snapshot_path).await?;
    assert!(
        !table_exists(&snapshot, "environments").await?,
        "no-pending migrate must leave the snapshot untouched"
    );
    snapshot.close().await;
    Ok(())
}

async fn connect_read_only(path: &std::path::Path) -> anyhow::Result<sqlx::SqlitePool> {
    Ok(sqlx::SqlitePool::connect(&format!("sqlite://{}?mode=ro", path.display())).await?)
}

async fn table_exists(pool: &sqlx::SqlitePool, table: &str) -> anyhow::Result<bool> {
    let count: i64 =
        sqlx::query_scalar("SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = ?")
            .bind(table)
            .fetch_one(pool)
            .await?;
    Ok(count == 1)
}