-- Chat Switchboard — 002 Teams & Access Control (SQLite)

CREATE TABLE IF NOT EXISTS teams (
    id          TEXT PRIMARY KEY,
    name        TEXT NOT NULL UNIQUE,
    description TEXT DEFAULT '',
    created_by  TEXT NOT NULL REFERENCES users(id) ON DELETE RESTRICT,
    is_active   INTEGER DEFAULT 1,
    settings    TEXT DEFAULT '{}',
    created_at  TEXT DEFAULT (datetime('now')),
    updated_at  TEXT DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_teams_active ON teams(is_active);

CREATE TABLE IF NOT EXISTS team_members (
    id          TEXT PRIMARY KEY,
    team_id     TEXT NOT NULL REFERENCES teams(id) ON DELETE CASCADE,
    user_id     TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    role        TEXT NOT NULL DEFAULT 'member'
                CHECK (role IN ('admin', 'member')),
    joined_at   TEXT DEFAULT (datetime('now')),
    UNIQUE(team_id, user_id)
);

CREATE INDEX IF NOT EXISTS idx_team_members_team ON team_members(team_id);
CREATE INDEX IF NOT EXISTS idx_team_members_user ON team_members(user_id);

CREATE TABLE IF NOT EXISTS groups (
    id          TEXT PRIMARY KEY,
    name        TEXT NOT NULL,
    description TEXT NOT NULL DEFAULT '',
    scope       TEXT NOT NULL DEFAULT 'global'
                CHECK (scope IN ('global', 'team')),
    team_id     TEXT REFERENCES teams(id) ON DELETE CASCADE,
    created_by  TEXT NOT NULL REFERENCES users(id),
    created_at  TEXT DEFAULT (datetime('now')),
    updated_at  TEXT DEFAULT (datetime('now')),

    CHECK (
        (scope = 'global' AND team_id IS NULL) OR
        (scope = 'team' AND team_id IS NOT NULL)
    )
);

CREATE UNIQUE INDEX IF NOT EXISTS idx_groups_name_scope
    ON groups(name, COALESCE(team_id, ''));

CREATE TABLE IF NOT EXISTS group_members (
    id          TEXT PRIMARY KEY,
    group_id    TEXT NOT NULL REFERENCES groups(id) ON DELETE CASCADE,
    user_id     TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    added_by    TEXT NOT NULL REFERENCES users(id),
    added_at    TEXT DEFAULT (datetime('now')),
    UNIQUE(group_id, user_id)
);

CREATE INDEX IF NOT EXISTS idx_group_members_group ON group_members(group_id);
CREATE INDEX IF NOT EXISTS idx_group_members_user ON group_members(user_id);