using Npgsql;

public class Account {
    NpgsqlConnection _connection = new();
    public KUID KUID { get; private set; } = new();


    public static Account NewAccount(NpgsqlConnection connection, string name) {
        KUID kuid = new("special placeholder");
        
        NpgsqlCommand command = new("""
            INSERT INTO accounts VALUES (
                ($1),
                ($2)
            )
        """, connection) {
            Parameters = {
                new NpgsqlParameter<string>() { Value = kuid.Text },
                new NpgsqlParameter<string>() { Value = name }
            }
        };

        command.ExecuteNonQuery();
        
        return AccountFromKUID(connection, kuid);
    }

    public static Account AccountFromKUID(NpgsqlConnection connection, KUID kuid) {
        return new() {
            _connection = connection,
            KUID = kuid
        };
    }


    public void AddPoki(string[] names, int[]? parentIDs = null, string[]? tags = null) {
        NpgsqlCommand command = new("""
            INSERT INTO poki VALUES (
                ($1),
                DEFAULT,
                ($2),
                ($3),
                DEFAULT, DEFAULT, DEFAULT,
                ($4)
            )
        """, _connection) {
            Parameters = {
                new() { Value = KUID.Text },
                new() { Value = names },
                new() { Value = (parentIDs == null ? DBNull.Value : parentIDs) },
                new() { Value = (tags == null ? DBNull.Value : tags) },
            }
        };
        
        command.ExecuteNonQuery();
        
        if (parentIDs == null) {
            return;
        }

        command = new("""
            UPDATE  poki
            SET     child_poki = child_poki || currval('poki_id_seq')
            WHERE   id = ANY($1)
        """, _connection) {
            Parameters = {
                new() { Value = parentIDs }
            }
        };
        
        command.ExecuteNonQuery();
    }

    public void GetPokiByName(string name) {
        NpgsqlCommand command = new("""
            SELECT  id
            FROM    poki
            WHERE ($1) IN names
            LIMIT 1
        """, _connection) {
            Parameters = {
                new() { Value = name }
            }
        };
    }
}