CREATE TABLE virtual_game_sessions (
    id BIGSERIAL PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(id),
    game_id VARCHAR(50) NOT NULL,
    session_token VARCHAR(255) NOT NULL UNIQUE,
    currency VARCHAR(3) NOT NULL,
    status VARCHAR(20) NOT NULL DEFAULT 'ACTIVE', -- ACTIVE, COMPLETED, FAILED
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    expires_at TIMESTAMP WITH TIME ZONE NOT NULL
);

CREATE TABLE virtual_game_transactions (
    id BIGSERIAL PRIMARY KEY,
    session_id BIGINT NOT NULL REFERENCES virtual_game_sessions(id),
    user_id BIGINT NOT NULL REFERENCES users(id),
    wallet_id BIGINT NOT NULL REFERENCES wallets(id),
    transaction_type VARCHAR(20) NOT NULL,
    amount BIGINT NOT NULL,
    currency VARCHAR(3) NOT NULL,
    external_transaction_id VARCHAR(100) NOT NULL UNIQUE, -- PopOK transaction ID
    status VARCHAR(20) NOT NULL DEFAULT 'PENDING', -- PENDING, COMPLETED, FAILED
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX idx_virtual_game_sessions_user_id ON virtual_game_sessions(user_id);
CREATE INDEX idx_virtual_game_transactions_session_id ON virtual_game_transactions(session_id);
CREATE INDEX idx_virtual_game_transactions_user_id ON virtual_game_transactions(user_id);