-- Loop staffing: attach agents / teams / orgs to a loop so the run driver
-- knows who fills the role slots baked into loops.graph. Three parallel
-- join tables, one per selection tier — the wizard lets the user mix modes
-- (e.g. one team + two individual specialists).
--
-- All FKs cascade off loop_id so an existing hard-delete of a loop stays a
-- single-statement operation with no orphans. Agent/team/org deletions
-- also cascade so we never point at a phantom entity.

CREATE TABLE loop_agents (
    loop_id    UUID NOT NULL REFERENCES loops (id) ON DELETE CASCADE,
    agent_id   UUID NOT NULL REFERENCES agents (id) ON DELETE CASCADE,
    role_slot  TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (loop_id, agent_id)
);
CREATE INDEX loop_agents_agent_idx ON loop_agents (agent_id);

CREATE TABLE loop_teams (
    loop_id    UUID NOT NULL REFERENCES loops (id) ON DELETE CASCADE,
    team_id    UUID NOT NULL REFERENCES teams (id) ON DELETE CASCADE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (loop_id, team_id)
);
CREATE INDEX loop_teams_team_idx ON loop_teams (team_id);

CREATE TABLE loop_orgs (
    loop_id    UUID NOT NULL REFERENCES loops (id) ON DELETE CASCADE,
    org_id     UUID NOT NULL REFERENCES orgs (id) ON DELETE CASCADE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (loop_id, org_id)
);
CREATE INDEX loop_orgs_org_idx ON loop_orgs (org_id);