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use sqlez_macros::sql;

use crate::{define_connection, query};

define_connection!(pub static ref KEY_VALUE_STORE: KeyValueStore<()> =
    &[sql!(
        CREATE TABLE IF NOT EXISTS kv_store(
            key TEXT PRIMARY KEY,
            value TEXT NOT NULL
        ) STRICT;
    )];
);

impl KeyValueStore {
    query! {
        pub fn read_kvp(key: &str) -> Result<Option<String>> {
            SELECT value FROM kv_store WHERE key = (?)
        }
    }

    query! {
        pub async fn write_kvp(key: String, value: String) -> Result<()> {
            INSERT OR REPLACE INTO kv_store(key, value) VALUES ((?), (?))
        }
    }

    query! {
        pub async fn delete_kvp(key: String) -> Result<()> {
            DELETE FROM kv_store WHERE key = (?)
        }
    }
}

#[cfg(test)]
mod tests {
    use crate::kvp::KeyValueStore;

    #[gpui::test]
    async fn test_kvp() {
        let db = KeyValueStore(crate::open_test_db("test_kvp").await);

        assert_eq!(db.read_kvp("key-1").unwrap(), None);

        db.write_kvp("key-1".to_string(), "one".to_string())
            .await
            .unwrap();
        assert_eq!(db.read_kvp("key-1").unwrap(), Some("one".to_string()));

        db.write_kvp("key-1".to_string(), "one-2".to_string())
            .await
            .unwrap();
        assert_eq!(db.read_kvp("key-1").unwrap(), Some("one-2".to_string()));

        db.write_kvp("key-2".to_string(), "two".to_string())
            .await
            .unwrap();
        assert_eq!(db.read_kvp("key-2").unwrap(), Some("two".to_string()));

        db.delete_kvp("key-1".to_string()).await.unwrap();
        assert_eq!(db.read_kvp("key-1").unwrap(), None);
    }
}