#!/usr/bin/env bash
# Host-side fleet helper. Mints a random 6-digit claim code per kit, writes the
# per-board env file each Uno Q needs (apess-node.env), and emits a printable
# CSV (kit, code, claim_url) for the QR stickers.
#
#   FLEET_SECRET=... APESS_URL=https://apess-api.redclaw.dev \
#   APESS_WEB=https://apess.redclaw.dev ./gen-kit-codes.sh 15 [out-dir]
#
# Then, per board: copy out/env/KIT-NN.env → the board's
# /home/arduino/.zeroclaw/apess-node.env, and encode the claim_url in its QR
# sticker (scanning it lands on /workshop?kit=..&code=.. with both pre-filled).
set -euo pipefail

N="${1:-15}"
OUT="${2:-./kit-codes}"
FLEET_SECRET="${FLEET_SECRET:?set FLEET_SECRET (the shared fleet secret, == APESS FLEET_SECRET)}"
APESS_URL="${APESS_URL:-https://apess-api.redclaw.dev}"
APESS_WEB="${APESS_WEB:-https://apess.redclaw.dev}"

mkdir -p "$OUT/env"
echo "kit,code,claim_url" > "$OUT/kit-codes.csv"

for i in $(seq 1 "$N"); do
  kit=$(printf "KIT-%02d" "$i")
  # 3 random bytes → hex → integer mod 1e6 → zero-padded 6-digit string.
  hex=$(head -c3 /dev/urandom | od -An -tx1 | tr -d ' \n')
  code=$(printf "%06d" "$(( 0x${hex} % 1000000 ))")
  umask 077
  cat > "$OUT/env/${kit}.env" <<EOF
KIT_ID=${kit}
CLAIM_CODE=${code}
FLEET_SECRET=${FLEET_SECRET}
APESS_URL=${APESS_URL}
EOF
  echo "${kit},${code},${APESS_WEB%/}/workshop?kit=${kit}&code=${code}" >> "$OUT/kit-codes.csv"
done

echo "wrote $N per-board env files to $OUT/env/ and the sticker CSV to $OUT/kit-codes.csv" >&2