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

MOCK_PORT=18080
MOCK_PID=""
MOCK_REQUEST_FILE=""
MOCK_RESPONSE_CODE=201
MOCK_STATE_FILE="/tmp/mock_api_state"

_kill_port() {
  local pids
  pids=$(lsof -ti ":$MOCK_PORT" 2>/dev/null) || true
  [ -n "$pids" ] && kill $pids 2>/dev/null || true
  sleep 0.2
}

_wait_port_free() {
  local i=0
  while lsof -ti ":$MOCK_PORT" >/dev/null 2>&1 && [ $i -lt 30 ]; do
    sleep 0.1
    i=$((i + 1))
  done
}

mock_start() {
  MOCK_RESPONSE_CODE="${MOCK_RESPONSE_CODE:-201}"
  MOCK_REQUEST_FILE=$(mktemp)
  echo "$MOCK_REQUEST_FILE" > "$MOCK_STATE_FILE"

  _kill_port
  _wait_port_free

  (
    while true; do
      printf 'HTTP/1.1 %d OK\r\nContent-Type: application/json\r\nConnection: close\r\n\r\n{"id":1}\n' "$MOCK_RESPONSE_CODE" \
        | nc -l "$MOCK_PORT" >> "$MOCK_REQUEST_FILE" 2>/dev/null || break
      sleep 0.05
    done
  ) &
  MOCK_PID=$!
  sleep 0.3
}

mock_stop() {
  [ -n "${MOCK_PID:-}" ] && kill "$MOCK_PID" 2>/dev/null || true
  _kill_port
  _wait_port_free
  [ -n "${MOCK_REQUEST_FILE:-}" ] && rm -f "${MOCK_REQUEST_FILE}" 2>/dev/null || true
  rm -f "$MOCK_STATE_FILE"
  MOCK_PID=""
}

mock_set_response() {
  MOCK_RESPONSE_CODE="${1:-201}"
}

_get_request_file() {
  if [ -f "$MOCK_STATE_FILE" ]; then
    cat "$MOCK_STATE_FILE"
  elif [ -n "${MOCK_REQUEST_FILE:-}" ]; then
    echo "$MOCK_REQUEST_FILE"
  else
    echo "/dev/null"
  fi
}

mock_get_request_body() {
  tail -1 "$(_get_request_file)" 2>/dev/null || true
}

mock_get_request_path() {
  head -1 "$(_get_request_file)" 2>/dev/null | awk '{print $2}' || true
}

mock_get_request_method() {
  head -1 "$(_get_request_file)" 2>/dev/null | awk '{print $1}' || true
}