-- Four-eyes approval for updates of existing e-conomic customers and products.
BEGIN;

CREATE TABLE IF NOT EXISTS economic_change_requests (
 id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
 connection_id INTEGER NOT NULL REFERENCES economic_catalog_connections(id),
 target_type TEXT NOT NULL CHECK (target_type IN ('customer', 'product')),
 target_number VARCHAR(25) NOT NULL,
 requested_changes JSONB NOT NULL,
 before_snapshot JSONB NOT NULL,
 proposed_snapshot JSONB NOT NULL,
 status TEXT NOT NULL DEFAULT 'pending'
   CHECK (status IN ('pending', 'applying', 'approved', 'rejected', 'failed', 'cancelled')),
 reason TEXT NOT NULL,
 requested_by_user_id INTEGER NOT NULL REFERENCES users(user_id),
 requested_at TIMESTAMPTZ NOT NULL DEFAULT now(),
 reviewed_by_user_id INTEGER REFERENCES users(user_id),
 reviewed_at TIMESTAMPTZ,
 review_note TEXT,
 applied_at TIMESTAMPTZ,
 response_snapshot JSONB,
 error TEXT,
 CHECK (char_length(trim(reason)) >= 10)
);

CREATE INDEX IF NOT EXISTS idx_economic_change_requests_status
 ON economic_change_requests(status, requested_at DESC);
CREATE UNIQUE INDEX IF NOT EXISTS idx_economic_change_requests_one_pending_target
 ON economic_change_requests(connection_id, target_type, target_number)
 WHERE status IN ('pending', 'applying');

INSERT INTO permissions(code, description, category) VALUES
 ('economic.changes.request', 'Anmode om ændring af eksisterende e-conomic-kunder og varer', 'economic'),
 ('economic.changes.approve', 'Godkende en anden brugers e-conomic-ændringer', 'economic')
ON CONFLICT(code) DO NOTHING;

COMMIT;