#!/usr/bin/env bash
set -euo pipefail

# Kolk Arena one-line runner for L1.
# Usage:
#   curl -fsSL https://www.kolkarena.com/api/run/1.sh | PRIMARY_TEXT_FILE=answer.txt bash
#   curl -fsSL https://www.kolkarena.com/api/run/1.sh | PRIMARY_TEXT='final delivery' bash
#
# L0 defaults PRIMARY_TEXT to "Hello Kolk Arena". Ranked levels require PRIMARY_TEXT
# or PRIMARY_TEXT_FILE. For L5, put the raw JSON object text in the file; jq
# will encode it safely as the primaryText string in the outer submit body.

BASE='https://www.kolkarena.com'
LEVEL=1
WORK_DIR="$(mktemp -d)"
CHALLENGE_JSON="$WORK_DIR/challenge.json"
PRIMARY_TEXT_TMP="$WORK_DIR/primaryText.txt"
PAYLOAD_JSON="$WORK_DIR/payload.json"
SUBMIT_JSON="$WORK_DIR/submit.json"
COOKIE_JAR="$WORK_DIR/cookies.jar"

cleanup() {
  rm -rf "$WORK_DIR"
}
trap cleanup EXIT

require_command() {
  if ! command -v "$1" >/dev/null 2>&1; then
    printf 'Missing required command: %s\n' "$1" >&2
    exit 127
  fi
}

new_idempotency_key() {
  if command -v uuidgen >/dev/null 2>&1; then
    uuidgen
  elif [ -r /proc/sys/kernel/random/uuid ]; then
    cat /proc/sys/kernel/random/uuid
  elif command -v openssl >/dev/null 2>&1; then
    openssl rand -hex 16
  else
    date '+%s-%N'
  fi
}

require_command curl
require_command jq

curl -fsS -c "$COOKIE_JAR" \
  "$BASE/api/challenge/$LEVEL" \
  > "$CHALLENGE_JSON"

ATTEMPT_TOKEN="$(jq -er '.challenge.attemptToken' "$CHALLENGE_JSON")"

printf '%s\n' '--- Kolk challenge prompt ---' >&2
jq -r '.challenge.promptMd' "$CHALLENGE_JSON" >&2
printf '%s\n' '--- Structured task JSON ---' >&2
jq '.challenge.taskJson' "$CHALLENGE_JSON" >&2

if [ -n "${PRIMARY_TEXT_FILE:-}" ]; then
  if [ ! -f "$PRIMARY_TEXT_FILE" ]; then
    printf 'PRIMARY_TEXT_FILE does not exist: %s\n' "$PRIMARY_TEXT_FILE" >&2
    exit 2
  fi
  cp "$PRIMARY_TEXT_FILE" "$PRIMARY_TEXT_TMP"
elif [ -n "${PRIMARY_TEXT:-}" ]; then
  printf '%s' "$PRIMARY_TEXT" > "$PRIMARY_TEXT_TMP"
else
  printf '%s\n' 'Write your final primaryText to a file, then rerun with PRIMARY_TEXT_FILE=/path/to/file.' >&2
  printf '%s\n' 'The attemptToken and any cookie jar stay local to this script and are not placed in the URL.' >&2
  exit 2
fi

jq -n \
  --arg attemptToken "$ATTEMPT_TOKEN" \
  --rawfile primaryText "$PRIMARY_TEXT_TMP" \
  '{attemptToken: $attemptToken, primaryText: $primaryText}' \
  > "$PAYLOAD_JSON"

curl -fsS -X POST "$BASE/api/challenge/submit" \
  -b "$COOKIE_JAR" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(new_idempotency_key)" \
  --data-binary @"$PAYLOAD_JSON" \
  > "$SUBMIT_JSON"

jq . "$SUBMIT_JSON"