import path from "node:path";
import process from "node:process";

import type {
  AdminDefaultUser,
  RuntimeConfig,
} from "../types/runtime-config.js";
import { parseBoolean, parseInteger, parseJsonArray } from "./runtime-env.js";
import { deepMerge } from "./runtime-merge.js";

type RuntimeConfigPath = readonly [string, ...string[]];
type RuntimeConfigValue = string | number | boolean | AdminDefaultUser[];
type RuntimeEnv = Record<string, string | undefined>;

type EnvOverride = {
  env: string;
  path: RuntimeConfigPath;
  read: (rawValue: unknown) => RuntimeConfigValue | null;
};

export const ENV_OVERRIDES: readonly EnvOverride[] = [
  integerEnv("PORT", ["server", "port"]),
  stringEnv("CHROME_PATH", ["browser", "chromePath"]),
  booleanEnv("TENCENT_BROWSER_HEADLESS", ["browser", "headless"]),
  booleanEnv("TENCENT_BROWSER_DEVTOOLS", ["browser", "devtools"]),
  booleanEnv("TENCENT_BROWSER_KEEP_ALIVE", ["browser", "keepAlive"]),
  booleanEnv("TENCENT_BROWSER_PREWARM", ["browser", "prewarm"]),
  integerEnv("TENCENT_BROWSER_SLOW_MO", ["browser", "slowMoMs"]),
  stringEnv("TENCENT_BROWSER_VNC_RESOLUTION", ["browser", "vncResolution"]),
  booleanEnv("TENCENT_SESSION_DEBUG", ["session", "debug"]),
  stringEnv("OCR_BASE_URL", ["ocr", "baseUrl"]),
  stringEnv("DATA_ROOT", ["data", "root"], path.resolve),
  stringEnv("LOG_LEVEL", ["logging", "level"]),
  stringEnv("DATABASE_URL", ["database", "url"]),
  booleanEnv("DATABASE_SSL", ["database", "ssl"]),
  integerEnv("DATABASE_MAX_CONNECTIONS", ["database", "maxConnections"]),
  integerEnv("CLAIM_TOKEN_TTL_HOURS", ["orders", "tokenTtlHours"]),
  stringEnv("ADMIN_SESSION_SECRET", ["admin", "sessionSecret"]),
  integerEnv("ADMIN_SESSION_TTL_HOURS", ["admin", "sessionTtlHours"]),
  adminUsersJsonEnv("ADMIN_DEFAULT_USERS_JSON", ["admin", "defaultUsers"]),
  stringEnv("AGISO_APP_SECRET", ["platforms", "agiso", "appSecret"]),
  stringEnv("AGISO_TRADE_DETAIL_ENDPOINT", [
    "platforms",
    "agiso",
    "tradeDetail",
    "endpoint",
  ]),
  stringEnv("AGISO_TRADE_DETAIL_API_VERSION", [
    "platforms",
    "agiso",
    "tradeDetail",
    "apiVersion",
  ]),
  integerEnv("AGISO_TRADE_DETAIL_TIMEOUT_MS", [
    "platforms",
    "agiso",
    "tradeDetail",
    "timeoutMs",
  ]),
  booleanEnv("AGISO_AUTO_DELIVERY_ENABLED", [
    "platforms",
    "agiso",
    "autoDelivery",
    "enabled",
  ]),
  stringEnv("AGISO_AUTO_DELIVERY_ENDPOINT", [
    "platforms",
    "agiso",
    "autoDelivery",
    "endpoint",
  ]),
  stringEnv("AGISO_AUTO_DELIVERY_API_VERSION", [
    "platforms",
    "agiso",
    "autoDelivery",
    "apiVersion",
  ]),
  stringEnv("AGISO_MESSAGE_API_VERSION", [
    "platforms",
    "agiso",
    "messaging",
    "apiVersion",
  ]),
  stringEnv("AGISO_SEND_MESSAGE_ENDPOINT", [
    "platforms",
    "agiso",
    "messaging",
    "sendMessageEndpoint",
  ]),
  booleanEnv("AGISO_MESSAGING_ENABLED", [
    "platforms",
    "agiso",
    "messaging",
    "enabled",
  ]),
  stringEnv("NINETYONE_USER_ID", ["platforms", "ninetyone", "userId"]),
  stringEnv("NINETYONE_SECRET", ["platforms", "ninetyone", "secret"]),
  stringEnv("NINETYONE_VERSION", ["platforms", "ninetyone", "version"]),
  stringEnv("NINETYONE_SHOP_ID", ["platforms", "ninetyone", "shopId"]),
  stringEnv("NINETYONE_SHOP_NAME", ["platforms", "ninetyone", "shopName"]),
  integerEnv("NINETYONE_TIMESTAMP_TOLERANCE_SECONDS", [
    "platforms",
    "ninetyone",
    "timestampToleranceSeconds",
  ]),
  stringEnv("NINETYONE_CARDS_ENCODING", [
    "platforms",
    "ninetyone",
    "cardsEncoding",
  ]),
  stringEnv("CLOUDTENTACLES_BASE_URL", [
    "platforms",
    "cloudtentacles",
    "baseUrl",
  ]),
  integerEnv("CLOUDTENTACLES_TIMEOUT_MS", [
    "platforms",
    "cloudtentacles",
    "timeoutMs",
  ]),
  stringEnv("CLOUDTENTACLES_SEND_SMS_PATH", [
    "platforms",
    "cloudtentacles",
    "sendSmsPath",
  ]),
  stringEnv("CLOUDTENTACLES_LOGIN_PATH", [
    "platforms",
    "cloudtentacles",
    "loginPath",
  ]),
  stringEnv("CLOUDTENTACLES_USER_INFO_PATH", [
    "platforms",
    "cloudtentacles",
    "userInfoPath",
  ]),
  stringEnv("CLOUDTENTACLES_ASSET_PATH", [
    "platforms",
    "cloudtentacles",
    "assetPath",
  ]),
  stringEnv("CLOUDTENTACLES_PERMISSION_PATH", [
    "platforms",
    "cloudtentacles",
    "permissionPath",
  ]),
  stringEnv("CLOUDTENTACLES_CATEGORIES_PATH", [
    "platforms",
    "cloudtentacles",
    "categoriesPath",
  ]),
  stringEnv("CLOUDTENTACLES_SKU_LIST_PATH", [
    "platforms",
    "cloudtentacles",
    "skuListPath",
  ]),
  stringEnv("CLOUDTENTACLES_SKU_BUY_PATH", [
    "platforms",
    "cloudtentacles",
    "skuBuyPath",
  ]),
  stringEnv("CLOUDTENTACLES_KNAPSACK_PATH", [
    "platforms",
    "cloudtentacles",
    "knapsackPath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_LIST_PATH", [
    "platforms",
    "cloudtentacles",
    "vnListPath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_APPOINT_PATH", [
    "platforms",
    "cloudtentacles",
    "vnAppointPath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_GENERATE_LOGIN_CODE_PATH", [
    "platforms",
    "cloudtentacles",
    "vnGenerateLoginCodePath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_VERIF_CODE_PATH", [
    "platforms",
    "cloudtentacles",
    "vnVerifCodePath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_VERIFY_LOGIN_CODE_PATH", [
    "platforms",
    "cloudtentacles",
    "vnVerifyLoginCodePath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_BIND_URL_PATH", [
    "platforms",
    "cloudtentacles",
    "vnBindUrlPath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_BIND_INFO_PATH", [
    "platforms",
    "cloudtentacles",
    "vnBindInfoPath",
  ]),
  stringEnv("CLOUDTENTACLES_VN_BACK_PATH", [
    "platforms",
    "cloudtentacles",
    "vnBackPath",
  ]),
  integerEnv("CLOUDTENTACLES_BIND_URL_TTL_SECONDS", [
    "platforms",
    "cloudtentacles",
    "bindUrlTtlSeconds",
  ]),
  integerEnv("CLOUDTENTACLES_BIND_URL_PROBE_INTERVAL_SECONDS", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeIntervalSeconds",
  ]),
  integerEnv("CLOUDTENTACLES_BIND_URL_PROBE_TIMEOUT_MS", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeTimeoutMs",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_USER_AGENT", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeUserAgent",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_ENDPOINT", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeEndpoint",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_CHART_ID", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeChartId",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_SUB_CHART_ID", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeSubChartId",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_IDE_TOKEN", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeIdeToken",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_ACTIVITY_URL", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeActivityUrl",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_REFERER", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeReferer",
  ]),
  stringEnv("CLOUDTENTACLES_BIND_URL_PROBE_EXTRA_COOKIE", [
    "platforms",
    "cloudtentacles",
    "bindUrlProbeExtraCookie",
  ]),
  stringEnv("CLOUDTENTACLES_PUBLIC_KEY_PEM", [
    "platforms",
    "cloudtentacles",
    "publicKeyPem",
  ]),
  stringEnv("CLOUDTENTACLES_CLIENT_SOURCE", [
    "platforms",
    "cloudtentacles",
    "clientSource",
  ]),
  stringEnv("CLOUDTENTACLES_DEVICE_ID", [
    "platforms",
    "cloudtentacles",
    "deviceId",
  ]),
  integerEnv("CLOUDTENTACLES_DEVICE_TYPE", [
    "platforms",
    "cloudtentacles",
    "deviceType",
  ]),
  stringEnv("TENCENT_REDEEM_PROOF_MODE", ["redeem", "proofMode"]),
  corsOriginsEnv("CORS_ALLOWED_ORIGINS", ["cors", "allowedOrigins"]),
];

export function applyEnvOverrides(
  baseConfig: RuntimeConfig,
  env: RuntimeEnv = process.env
): RuntimeConfig {
  const nextConfig = deepMerge(baseConfig, {});

  applyClaimBaseUrlOverride(nextConfig, env);

  for (const override of ENV_OVERRIDES) {
    const value = override.read(env[override.env]);
    if (value !== null) {
      setConfigValue(nextConfig, override.path, value);
    }
  }

  return nextConfig;
}

function applyClaimBaseUrlOverride(
  config: RuntimeConfig,
  env: RuntimeEnv
): void {
  const claimBaseUrl = parseString(env.CLAIM_BASE_URL);
  if (claimBaseUrl !== null) {
    config.orders.claimBaseUrl = claimBaseUrl;
    return;
  }

  const appBaseUrl = parseString(env.APP_BASE_URL);
  if (appBaseUrl !== null) {
    config.orders.claimBaseUrl = `${appBaseUrl.replace(/\/+$/, "")}/#/claim`;
  }
}

function stringEnv(
  env: string,
  configPath: RuntimeConfigPath,
  transform: (value: string) => string = (value) => value
): EnvOverride {
  return {
    env,
    path: configPath,
    read(rawValue) {
      const value = parseString(rawValue);
      return value === null ? null : transform(value);
    },
  };
}

function integerEnv(env: string, configPath: RuntimeConfigPath): EnvOverride {
  return {
    env,
    path: configPath,
    read: parseInteger,
  };
}

function booleanEnv(env: string, configPath: RuntimeConfigPath): EnvOverride {
  return {
    env,
    path: configPath,
    read: parseBoolean,
  };
}

function adminUsersJsonEnv(env: string, configPath: RuntimeConfigPath): EnvOverride {
  return {
    env,
    path: configPath,
    read(rawValue) {
      return parseJsonArray<AdminDefaultUser>(rawValue)
    },
  }
}

function corsOriginsEnv(env: string, configPath: RuntimeConfigPath): EnvOverride {
  return {
    env,
    path: configPath,
    read(rawValue) {
      const value = parseString(rawValue)
      if (value === null) {
        return null
      }
      if (value.trim() === '*') {
        return ['*']
      }
      return value.split(',').map((s) => s.trim()).filter(Boolean)
    },
  }
}

function parseString(rawValue: unknown): string | null {
  const value = String(rawValue || "").trim();
  return value ? value : null;
}

function setConfigValue(
  config: RuntimeConfig,
  configPath: RuntimeConfigPath,
  value: RuntimeConfigValue
): void {
  let current: Record<string, unknown> = config as unknown as Record<
    string,
    unknown
  >;

  for (const key of configPath.slice(0, -1)) {
    const nextValue = current[key];
    if (
      !nextValue ||
      typeof nextValue !== "object" ||
      Array.isArray(nextValue)
    ) {
      current[key] = {};
    }
    current = current[key] as Record<string, unknown>;
  }

  current[configPath[configPath.length - 1]] = value;
}