CREATE TABLE teams (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    name VARCHAR(255) NOT NULL,
    slug VARCHAR(255) UNIQUE NOT NULL,
    owner_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE team_members (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    team_id UUID NOT NULL REFERENCES teams(id) ON DELETE CASCADE,
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    role VARCHAR(50) NOT NULL DEFAULT 'member',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(team_id, user_id)
);

CREATE INDEX idx_teams_owner ON teams(owner_id);
CREATE INDEX idx_team_members_team ON team_members(team_id);
CREATE INDEX idx_team_members_user ON team_members(user_id);