-- Meshkee CMS — categories for products, blogs, portfolios

CREATE TABLE categories (
  id          BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  business_id BIGINT NOT NULL,
  entity_type media_entity_type NOT NULL,
  parent_id   BIGINT,
  name        VARCHAR(255) NOT NULL,
  slug        VARCHAR(255) NOT NULL,
  description TEXT,
  sort_order  INTEGER NOT NULL DEFAULT 0,
  is_active   BOOLEAN NOT NULL DEFAULT TRUE,
  created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),

  CONSTRAINT categories_business_entity_slug_unique
    UNIQUE (business_id, entity_type, slug),
  CONSTRAINT categories_business_id_fkey
    FOREIGN KEY (business_id) REFERENCES businesses (id) ON DELETE CASCADE,
  CONSTRAINT categories_parent_id_fkey
    FOREIGN KEY (parent_id) REFERENCES categories (id) ON DELETE SET NULL,
  CONSTRAINT categories_slug_format CHECK (slug ~ '^[a-z0-9]+(?:-[a-z0-9]+)*$')
);

CREATE INDEX idx_categories_business_entity
  ON categories (business_id, entity_type, sort_order);
CREATE INDEX idx_categories_parent_id ON categories (parent_id);
CREATE INDEX idx_categories_active
  ON categories (business_id, entity_type) WHERE is_active = TRUE;

CREATE TRIGGER categories_set_updated_at
  BEFORE UPDATE ON categories
  FOR EACH ROW
  EXECUTE FUNCTION set_updated_at();

CREATE TABLE category_assignments (
  id          BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  business_id BIGINT NOT NULL,
  category_id BIGINT NOT NULL,
  entity_type media_entity_type NOT NULL,
  entity_id   BIGINT NOT NULL,
  created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),

  CONSTRAINT category_assignments_unique
    UNIQUE (category_id, entity_type, entity_id),
  CONSTRAINT category_assignments_business_id_fkey
    FOREIGN KEY (business_id) REFERENCES businesses (id) ON DELETE CASCADE,
  CONSTRAINT category_assignments_category_id_fkey
    FOREIGN KEY (category_id) REFERENCES categories (id) ON DELETE CASCADE
);

CREATE INDEX idx_category_assignments_entity
  ON category_assignments (business_id, entity_type, entity_id);
CREATE INDEX idx_category_assignments_category_id
  ON category_assignments (category_id);

INSERT INTO permissions (name, slug, group_name, description) VALUES
  ('View categories',   'categories.read',   'categories', 'View categories'),
  ('Create categories', 'categories.create', 'categories', 'Create categories'),
  ('Update categories', 'categories.update', 'categories', 'Edit categories'),
  ('Delete categories', 'categories.delete', 'categories', 'Delete categories');

INSERT INTO role_permissions (role_id, permission_id)
SELECT r.id, p.id
FROM roles r
JOIN permissions p ON p.slug LIKE 'categories.%'
WHERE r.slug IN ('owner', 'admin');

INSERT INTO role_permissions (role_id, permission_id)
SELECT r.id, p.id
FROM roles r
JOIN permissions p ON p.slug IN ('categories.read', 'categories.create', 'categories.update')
WHERE r.slug = 'editor';

INSERT INTO role_permissions (role_id, permission_id)
SELECT r.id, p.id
FROM roles r
JOIN permissions p ON p.slug = 'categories.read'
WHERE r.slug = 'viewer';