-- +goose Up
-- Apply legacy forces staging data into `forces_present`.
-- Expected flow before this migration:
-- 1) Run previous migration that creates `forces_old_import`.
-- 2) Import old dump rows into `forces_old_import`.
-- This migration maps old integer IDs into BINARY(16) UUID-style IDs,
-- then upserts into `forces_present` with `is_active` forced to 1.

START TRANSACTION;

INSERT INTO forces_old_id_map (old_id, new_id)
SELECT
  s.id AS old_id,
  UNHEX(REPLACE(
    LOWER(CONCAT(
      LPAD(HEX(FLOOR(CAST(UNIX_TIMESTAMP(UTC_TIMESTAMP(3)) * 1000 AS UNSIGNED) / 65536)), 8, '0'),
      '-',
      LPAD(HEX(MOD(CAST(UNIX_TIMESTAMP(UTC_TIMESTAMP(3)) * 1000 AS UNSIGNED), 65536)), 4, '0'),
      '-',
      '7', LPAD(HEX(FLOOR(RAND() * 4096)), 3, '0'),
      '-',
      LPAD(HEX(FLOOR(RAND() * 16384) + 32768), 4, '0'),
      '-',
      LPAD(HEX(FLOOR(RAND() * 281474976710656)), 12, '0')
    )),
    '-', ''
  )) AS new_id
FROM forces_old_import s
LEFT JOIN forces_old_id_map m ON m.old_id = s.id
WHERE m.old_id IS NULL;

INSERT INTO forces_present (
  id,
  name,
  is_active,
  created_at,
  updated_at
)
SELECT
  m.new_id,
  LEFT(COALESCE(NULLIF(TRIM(s.name), ''), CONCAT('Forces ', s.id)), 128) AS name,
  1 AS is_active,
  UTC_TIMESTAMP() AS created_at,
  UTC_TIMESTAMP() AS updated_at
FROM forces_old_import s
JOIN forces_old_id_map m ON m.old_id = s.id
ON DUPLICATE KEY UPDATE
  name = VALUES(name),
  is_active = 1,
  updated_at = UTC_TIMESTAMP();

COMMIT;

-- +goose Down
-- Data migration is intentionally non-reversible.
-- Keep imported data and ID mapping as audit trail.
SELECT 1;
