-- Notifications (in-app)
CREATE TABLE IF NOT EXISTS notifications (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    title VARCHAR(255) NOT NULL,
    body TEXT,
    type VARCHAR(50),     -- APPROVAL, LEAD, JOB, PAYMENT
    reference_id UUID,
    is_read BOOLEAN NOT NULL DEFAULT false,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Email logs (audit trail)
CREATE TABLE IF NOT EXISTS email_logs (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID REFERENCES users(id),
    trigger VARCHAR(100) NOT NULL,  -- PROFILE_APPROVED, JOB_APPROVED, etc.
    to_email VARCHAR(255) NOT NULL,
    subject VARCHAR(500),
    status VARCHAR(20) NOT NULL DEFAULT 'PENDING', -- PENDING, SENT, FAILED
    sent_at TIMESTAMPTZ
);

CREATE INDEX IF NOT EXISTS idx_notifications_user_id ON notifications(user_id);
CREATE INDEX IF NOT EXISTS idx_notifications_is_read ON notifications(is_read);
CREATE INDEX IF NOT EXISTS idx_email_logs_user_id ON email_logs(user_id);