CREATE TABLE e_address_settings (
  singleton boolean PRIMARY KEY DEFAULT true CHECK (singleton),
  trusted_proxy_cidrs text[] NOT NULL DEFAULT '{}',
  default_address_id uuid,
  rule_revision bigint NOT NULL DEFAULT 1,
  updated_by uuid REFERENCES users(id),
  updated_at timestamptz NOT NULL DEFAULT now()
);
INSERT INTO e_address_settings(singleton) VALUES (true);

CREATE TABLE e_addresses (
  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
  name text NOT NULL CHECK (length(btrim(name)) BETWEEN 1 AND 128),
  public_url text NOT NULL CHECK (public_url ~ '^https?://[^/?#[:space:]]+'),
  country text NOT NULL DEFAULT '',
  region text NOT NULL DEFAULT '',
  city text NOT NULL DEFAULT '',
  carrier text NOT NULL DEFAULT '',
  asn bigint NOT NULL DEFAULT 0 CHECK (asn BETWEEN 0 AND 4294967295),
  node_group text NOT NULL DEFAULT '',
  priority integer NOT NULL DEFAULT 100 CHECK (priority BETWEEN -100000 AND 100000),
  enabled boolean NOT NULL DEFAULT true,
  healthy boolean NOT NULL DEFAULT false,
  license_valid boolean NOT NULL DEFAULT false,
  allow_user_publish boolean NOT NULL DEFAULT true,
  maintenance boolean NOT NULL DEFAULT false,
  description text NOT NULL DEFAULT '',
  created_at timestamptz NOT NULL DEFAULT now(),
  updated_at timestamptz NOT NULL DEFAULT now()
);
CREATE UNIQUE INDEX e_addresses_public_url_idx ON e_addresses(public_url);
CREATE INDEX e_addresses_selection_idx ON e_addresses(enabled,healthy,license_valid,allow_user_publish,maintenance,priority);

ALTER TABLE e_address_settings
  ADD CONSTRAINT e_address_settings_default_fk FOREIGN KEY(default_address_id) REFERENCES e_addresses(id) ON DELETE SET NULL;

CREATE TABLE e_address_rules (
  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
  priority integer NOT NULL DEFAULT 100 CHECK (priority BETWEEN -100000 AND 100000),
  country text NOT NULL DEFAULT '',
  region text NOT NULL DEFAULT '',
  carrier text NOT NULL DEFAULT '',
  asn bigint NOT NULL DEFAULT 0 CHECK (asn BETWEEN 0 AND 4294967295),
  node_group text NOT NULL DEFAULT '',
  address_id uuid NOT NULL REFERENCES e_addresses(id) ON DELETE CASCADE,
  enabled boolean NOT NULL DEFAULT true,
  created_at timestamptz NOT NULL DEFAULT now(),
  updated_at timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX e_address_rules_match_idx ON e_address_rules(enabled,priority,country,region,carrier,asn,node_group);

CREATE TABLE e_user_assignments (
  user_id uuid PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
  address_id uuid NOT NULL REFERENCES e_addresses(id),
  fixed boolean NOT NULL DEFAULT false,
  rule_revision bigint NOT NULL DEFAULT 1,
  reason text NOT NULL DEFAULT '',
  source_ip_hash text NOT NULL DEFAULT '',
  assigned_at timestamptz NOT NULL DEFAULT now(),
  expires_at timestamptz,
  updated_by uuid REFERENCES users(id),
  updated_at timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX e_user_assignments_expiry_idx ON e_user_assignments(expires_at);

CREATE TABLE e_assignment_history (
  id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
  user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  address_id uuid REFERENCES e_addresses(id) ON DELETE SET NULL,
  source_ip_hash text NOT NULL DEFAULT '',
  reason text NOT NULL DEFAULT '',
  rule_revision bigint NOT NULL,
  created_at timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX e_assignment_history_user_idx ON e_assignment_history(user_id,created_at DESC);