CREATE TABLE public.bot_api_updates (
    id bigint GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    bot_user_id bigint NOT NULL,
    update_kind varchar(32) NOT NULL,
    peer_type varchar(16) NOT NULL,
    peer_id bigint NOT NULL,
    message_id integer NOT NULL,
    source_pts integer NOT NULL DEFAULT 0,
    date integer NOT NULL DEFAULT 0,
    created_at timestamptz NOT NULL DEFAULT now(),
    CONSTRAINT bot_api_updates_kind_check CHECK ((update_kind)::text = ANY (ARRAY['message'::text, 'edited_message'::text])),
    CONSTRAINT bot_api_updates_peer_type_check CHECK ((peer_type)::text = ANY (ARRAY['user'::text, 'channel'::text])),
    CONSTRAINT bot_api_updates_peer_id_check CHECK (peer_id > 0),
    CONSTRAINT bot_api_updates_message_id_check CHECK (message_id > 0),
    CONSTRAINT bot_api_updates_source_pts_check CHECK (source_pts >= 0),
    CONSTRAINT bot_api_updates_source_unique UNIQUE (bot_user_id, update_kind, peer_type, peer_id, message_id, source_pts),
    CONSTRAINT bot_api_updates_bot_user_id_fkey FOREIGN KEY (bot_user_id) REFERENCES public.bots(bot_user_id) ON DELETE CASCADE
);

CREATE INDEX bot_api_updates_bot_scan_idx ON public.bot_api_updates (bot_user_id, id);
CREATE INDEX bot_api_updates_retention_idx ON public.bot_api_updates (date, id);

CREATE TABLE public.bot_api_update_states (
    bot_user_id bigint PRIMARY KEY,
    confirmed_update_id bigint NOT NULL DEFAULT 0,
    updated_at timestamptz NOT NULL DEFAULT now(),
    CONSTRAINT bot_api_update_states_confirmed_check CHECK (confirmed_update_id >= 0),
    CONSTRAINT bot_api_update_states_bot_user_id_fkey FOREIGN KEY (bot_user_id) REFERENCES public.bots(bot_user_id) ON DELETE CASCADE
);