-- Village Ward Calling Board — database schema (MariaDB)
-- Fresh install:  mysql -u <user> -p <dbname> < schema.sql
-- (Already ran the earlier single-ward schema? Use migration_multiward.sql instead.)

CREATE TABLE IF NOT EXISTS wards (
  id         INT AUTO_INCREMENT PRIMARY KEY,
  name       VARCHAR(120) NOT NULL,
  slug       VARCHAR(80)  NOT NULL UNIQUE,   -- used in URLs later, e.g. /Village
  created_at TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE IF NOT EXISTS users (
  id            INT AUTO_INCREMENT PRIMARY KEY,
  email         VARCHAR(255) NOT NULL UNIQUE,
  password_hash VARCHAR(255) NOT NULL,
  role          ENUM('super_admin','admin','viewer') NOT NULL DEFAULT 'viewer',
  ward_id       INT          DEFAULT NULL,   -- NULL for super_admin (spans all wards)
  created_at    TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_user_ward FOREIGN KEY (ward_id)
    REFERENCES wards(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Each save is a new row. The row with is_live = 1 (per ward) is what visitors see.
CREATE TABLE IF NOT EXISTS page_versions (
  id          INT AUTO_INCREMENT PRIMARY KEY,
  ward_id     INT          NOT NULL,
  html        LONGTEXT     NOT NULL,
  note        VARCHAR(255) DEFAULT NULL,           -- optional "what changed" label
  is_live     TINYINT(1)   NOT NULL DEFAULT 0,
  created_by  INT          DEFAULT NULL,
  created_at  TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_version_ward FOREIGN KEY (ward_id)
    REFERENCES wards(id) ON DELETE CASCADE,
  CONSTRAINT fk_version_user FOREIGN KEY (created_by)
    REFERENCES users(id) ON DELETE SET NULL,
  INDEX idx_live (ward_id, is_live)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;