BEGIN;

CREATE OR REPLACE FUNCTION set_updated_at()
RETURNS TRIGGER
LANGUAGE plpgsql AS
$$
BEGIN
    NEW.updated_at := NOW();
    RETURN NEW;
END;
$$;

COMMIT;

-- Таблица привилегий (например: "Администратор", "Оператор склада", "Менеджер заказов")
CREATE TABLE user_privileges (
    id SERIAL PRIMARY KEY,
    code TEXT NOT NULL UNIQUE, -- internal code (e.g., 'admin', 'warehouse_operator')
    name TEXT NOT NULL,        -- display name
    description TEXT,
    is_active BOOLEAN DEFAULT TRUE,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

-- Таблица прав (перечень отдельных действий — CRUD по сущностям)
CREATE TABLE user_permissions (
    id SERIAL PRIMARY KEY,
    code TEXT NOT NULL UNIQUE, -- internal code (e.g., 'product.view', 'order.update')
    name TEXT NOT NULL,
    description TEXT,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

-- Связь привилегий и разрешений (многие ко многим)
CREATE TABLE user_privilege_permissions (
    privilege_id INTEGER REFERENCES user_privileges(id) ON DELETE CASCADE,
    permission_id INTEGER REFERENCES user_permissions(id) ON DELETE CASCADE,
    PRIMARY KEY (privilege_id, permission_id)
);

-- Таблица юзеров
-- CREATE TABLE user_employees (
--     id SERIAL PRIMARY KEY,
--     full_name TEXT,
--     login TEXT UNIQUE,
--     password_hash TEXT NOT NULL,
--     is_active BOOLEAN DEFAULT FALSE,
--     privilege_id INTEGER REFERENCES user_privileges(id),
--     created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
-- );
CREATE TABLE users (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    full_name TEXT,
    login TEXT UNIQUE,
    password_hash TEXT NOT NULL,

    is_blocked BOOLEAN DEFAULT FALSE,
    is_deleted BOOLEAN DEFAULT FALSE,
    privilege_id INTEGER REFERENCES user_privileges(id),

    -- Баланс
    --btc BIGINT DEFAULT 0,
    --btc_balance NUMERIC(20, 8) DEFAULT 0.0,

    -- Конфиденциальность
    is_searchable BOOLEAN DEFAULT TRUE,
    allow_message_forwarding BOOLEAN DEFAULT TRUE,
    allow_messages_from_non_contacts BOOLEAN DEFAULT TRUE,
    show_profile_photo_to_non_contacts BOOLEAN DEFAULT TRUE,
    last_seen_visibility SMALLINT DEFAULT 0 CHECK (last_seen_visibility IN (0, 1, 2)),
    last_seen_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,

    -- Биография
    bio TEXT,
    show_bio_to_non_contacts BOOLEAN DEFAULT TRUE,

    -- Сторисы
    show_stories_to_non_contacts BOOLEAN DEFAULT TRUE,

    -- Разрешения на чаты
    allow_server_chats BOOLEAN DEFAULT TRUE,
    public_invite_permission SMALLINT DEFAULT 0 CHECK (public_invite_permission IN (0, 1, 2)),
    group_invite_permission SMALLINT DEFAULT 0 CHECK (group_invite_permission IN (0, 1, 2)),
    --chat_invite_permission SMALLINT DEFAULT 0 CHECK (chat_invite_permission IN (0, 1, 2)),

    -- Звонки
    call_permission SMALLINT DEFAULT 0 CHECK (call_permission IN (0, 1, 2)),

    -- Автоудаление аккаунта
    auto_delete_after_days INTEGER CHECK (auto_delete_after_days IS NULL OR auto_delete_after_days > 0),

    -- Автоудаление сообщений
    force_auto_delete_messages_in_private BOOLEAN DEFAULT FALSE,
    max_message_auto_delete_seconds INTEGER CHECK (max_message_auto_delete_seconds IS NULL OR max_message_auto_delete_seconds >= 0),

    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

-- =======================
-- Таблица сессий
-- =======================
CREATE TABLE user_sessions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    user_id UUID REFERENCES users(id) ON DELETE CASCADE,

    access_token TEXT NOT NULL,     -- JWT
    refresh_token TEXT NOT NULL,        -- JWT

    ip_address TEXT,
    user_agent TEXT,

    is_active BOOLEAN DEFAULT TRUE,

    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    last_refresh_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

-- =======================
-- Функция автообновления last_refresh_at при смене токенов
-- =======================
CREATE OR REPLACE FUNCTION update_last_refresh_at()
RETURNS TRIGGER AS $$
BEGIN
    IF NEW.access_token IS DISTINCT FROM OLD.access_token THEN
        NEW.last_refresh_at := CURRENT_TIMESTAMP;
    END IF;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- =======================
-- Триггер на обновление
-- =======================
CREATE TRIGGER trg_update_last_refresh_at
BEFORE UPDATE ON user_sessions
FOR EACH ROW
EXECUTE FUNCTION update_last_refresh_at();