-- Form folders and directory folders with hierarchical structure

CREATE TABLE IF NOT EXISTS form_folders (
  id SERIAL PRIMARY KEY,
  organization_id INTEGER NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
  name VARCHAR(200) NOT NULL,
  parent_id INTEGER,
  position INTEGER NOT NULL DEFAULT 0,
  created_at TIMESTAMP DEFAULT NOW(),
  updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS form_folders_org_parent_idx ON form_folders(organization_id, parent_id);
CREATE INDEX IF NOT EXISTS form_folders_position_idx ON form_folders(position);

ALTER TABLE forms
  ADD COLUMN IF NOT EXISTS folder_id INTEGER;

CREATE INDEX IF NOT EXISTS forms_folder_idx ON forms(folder_id);

CREATE TABLE IF NOT EXISTS directory_folders (
  id SERIAL PRIMARY KEY,
  organization_id INTEGER NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
  name VARCHAR(200) NOT NULL,
  parent_id INTEGER,
  position INTEGER NOT NULL DEFAULT 0,
  created_at TIMESTAMP DEFAULT NOW(),
  updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS directory_folders_org_parent_idx ON directory_folders(organization_id, parent_id);
CREATE INDEX IF NOT EXISTS directory_folders_position_idx ON directory_folders(position);

ALTER TABLE data_tables
  ADD COLUMN IF NOT EXISTS folder_id INTEGER;

CREATE INDEX IF NOT EXISTS data_tables_folder_idx ON data_tables(folder_id);