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

BASE_URL="${BASE_URL:-http://127.0.0.1:3000}"
DEVICE_FINGERPRINT="${DEVICE_FINGERPRINT:-benchmark-dashboard}"
ADMIN_IDENTIFIER="${ADMIN_IDENTIFIER:-finance_mgr@hyinda.com}"
ADMIN_PASSWORD="${ADMIN_PASSWORD:-FinanceMgrPassword1234}"
ITERATIONS="${ITERATIONS:-10}"

if ! command -v curl >/dev/null 2>&1; then
  echo "[ERROR] curl not found" >&2
  exit 1
fi

if ! command -v jq >/dev/null 2>&1; then
  echo "[ERROR] jq not found" >&2
  exit 1
fi

TMP_DIR="$(mktemp -d)"
cleanup() {
  rm -rf "$TMP_DIR"
}
trap cleanup EXIT

login() {
  local out_file="$1"
  local status
  status="$(curl -sS -o "$out_file" -w "%{http_code}" \
    -X POST "$BASE_URL/api/auth/login" \
    -H "content-type: application/json" \
    -H "x-device-fingerprint: $DEVICE_FINGERPRINT" \
    -d "{\"identifier\":\"$ADMIN_IDENTIFIER\",\"password\":\"$ADMIN_PASSWORD\"}")"

  if [[ "$status" != "200" ]]; then
    echo "[ERROR] login failed: HTTP $status" >&2
    cat "$out_file" >&2
    exit 1
  fi

  jq -er '.data.accessToken' "$out_file"
}

benchmark_endpoint() {
  local endpoint="$1"
  local token="$2"

  local total_ms=0
  local max_ms=0
  local min_ms=999999

  for _ in $(seq 1 "$ITERATIONS"); do
    local body_file="$TMP_DIR/$(basename "$endpoint").json"
    local elapsed
    elapsed="$(curl -sS -o "$body_file" -w "%{time_total}" \
      -H "authorization: Bearer $token" \
      "$BASE_URL$endpoint")"

    local elapsed_ms
    elapsed_ms="$(python3 - <<PY
value = float("$elapsed")
print(int(round(value * 1000)))
PY
)"

    total_ms=$((total_ms + elapsed_ms))
    if (( elapsed_ms > max_ms )); then
      max_ms=$elapsed_ms
    fi
    if (( elapsed_ms < min_ms )); then
      min_ms=$elapsed_ms
    fi
  done

  local avg_ms=$((total_ms / ITERATIONS))
  echo "$endpoint avg=${avg_ms}ms min=${min_ms}ms max=${max_ms}ms iterations=$ITERATIONS"
}

echo "[1/2] Login"
TOKEN="$(login "$TMP_DIR/login.json")"

echo "[2/2] Dashboard endpoint benchmarks"
benchmark_endpoint "/api/dashboard/expense-overview" "$TOKEN"
benchmark_endpoint "/api/dashboard/trends" "$TOKEN"
benchmark_endpoint "/api/dashboard/top-categories" "$TOKEN"
benchmark_endpoint "/api/dashboard/approval-efficiency" "$TOKEN"

echo "[OK] Dashboard benchmark completed"