-- Add zone + dest_postcode to prc_quote / zone to prc_order_bill
-- Idempotent
-- charset: utf8mb4

SET NAMES utf8mb4;
SET @db := DATABASE();

-- ========== prc_quote ==========
SET @has := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_quote' AND COLUMN_NAME = 'dest_postcode'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_quote ADD COLUMN dest_postcode VARCHAR(20) DEFAULT NULL COMMENT ''dest postcode'' AFTER country_name',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_quote' AND COLUMN_NAME = 'zone_id'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_quote ADD COLUMN zone_id BIGINT(20) DEFAULT NULL COMMENT ''prc_zone.zone_id'' AFTER dest_postcode',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_quote' AND COLUMN_NAME = 'zone_code'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_quote ADD COLUMN zone_code VARCHAR(50) DEFAULT NULL COMMENT ''zone code'' AFTER zone_id',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_quote' AND COLUMN_NAME = 'zone_name'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_quote ADD COLUMN zone_name VARCHAR(100) DEFAULT NULL COMMENT ''zone display name'' AFTER zone_code',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has := (
  SELECT COUNT(*) FROM information_schema.STATISTICS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_quote' AND INDEX_NAME = 'idx_quote_zone'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_quote ADD INDEX idx_quote_zone (zone_id)',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- ========== prc_order_bill ==========
SET @has := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND COLUMN_NAME = 'zone_id'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_order_bill ADD COLUMN zone_id BIGINT(20) DEFAULT NULL COMMENT ''prc_zone.zone_id'' AFTER country_name',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND COLUMN_NAME = 'zone_code'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_order_bill ADD COLUMN zone_code VARCHAR(50) DEFAULT NULL COMMENT ''zone code'' AFTER zone_id',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND COLUMN_NAME = 'zone_name'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_order_bill ADD COLUMN zone_name VARCHAR(100) DEFAULT NULL COMMENT ''zone display name'' AFTER zone_code',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has := (
  SELECT COUNT(*) FROM information_schema.STATISTICS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND INDEX_NAME = 'idx_bill_zone'
);
SET @sql := IF(@has = 0,
  'ALTER TABLE prc_order_bill ADD INDEX idx_bill_zone (zone_id)',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;