-- 1. VERIFICATIONS TABLE
CREATE TABLE IF NOT EXISTS verifications (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    role_key VARCHAR(50) NOT NULL,
    status VARCHAR(50) NOT NULL DEFAULT 'PENDING', -- PENDING, UNDER_REVIEW, DOCUMENTS_REQUESTED, REVISION_REQUESTED, APPROVED, REJECTED
    priority VARCHAR(10) NOT NULL DEFAULT 'LOW',    -- HIGH, MEDIUM, LOW
    case_type VARCHAR(50) NOT NULL,                -- PROFILE, PORTFOLIO, JOB, REQUIREMENT
    payload JSONB NOT NULL DEFAULT '{}',           -- full submission data
    documents JSONB NOT NULL DEFAULT '[]',         -- list of documents [{id, title, url, status}]
    notes TEXT,
    rejection_reason TEXT,
    assigned_to UUID REFERENCES users(id) ON DELETE SET NULL, -- Admin/Employee ID
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 2. VERIFICATION LOGS (History of actions)
CREATE TABLE IF NOT EXISTS verification_logs (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    verification_id UUID NOT NULL REFERENCES verifications(id) ON DELETE CASCADE,
    action VARCHAR(50) NOT NULL, -- STATUS_CHANGE, NOTE_ADDED, DOCS_REQUESTED, REASSIGNED
    actor_id UUID REFERENCES users(id) ON DELETE SET NULL,
    old_status VARCHAR(50),
    new_status VARCHAR(50),
    message TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 3. INDEXES
CREATE INDEX IF NOT EXISTS idx_verifications_user_id ON verifications(user_id);
CREATE INDEX IF NOT EXISTS idx_verifications_status ON verifications(status);
CREATE INDEX IF NOT EXISTS idx_verifications_case_type ON verifications(case_type);
CREATE INDEX IF NOT EXISTS idx_verification_logs_ver_id ON verification_logs(verification_id);