-- Migration 089: Group join requests (private groups - request to join)
-- v0.302 Lot S2.1

CREATE TABLE IF NOT EXISTS group_join_requests (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    group_id UUID NOT NULL REFERENCES groups(id) ON DELETE CASCADE,
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    status VARCHAR(20) NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'approved', 'rejected')),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(group_id, user_id)
);

CREATE INDEX IF NOT EXISTS idx_group_join_requests_group_id ON group_join_requests(group_id);
CREATE INDEX IF NOT EXISTS idx_group_join_requests_user_id ON group_join_requests(user_id);
CREATE INDEX IF NOT EXISTS idx_group_join_requests_status ON group_join_requests(status);