'use strict';

/**
 * 「仓储中心发货时效」两轮核验完成后推文本到钉钉群 —— 配置与状态存取
 * ────────────────────────────────────────────────────────────────────────────
 * 业务口径（2026-10-27）：
 *   「13 点核验 7 点前的超时单，核验完成后通知；18:00 核验的订单，核验完成后也通知。」
 *   ⟹ **一天两推**，各自绑一个核验轮次：
 *        NOON      13:00 核验（窗口上界 07:00 前审核）→ 默认 13:05 推
 *        AFTERNOON 18:00 核验（窗口上界 16:00 前审核）→ 默认 18:05 推
 *   ⚠️ 默认给到「核验时刻 + 5 分钟」而不是整点：状态镜像 `query_time` 要略晚于核验时刻，
 *      否则 `freshness.coversDeadline=false`（数据没覆盖本轮核验点），推出去的超时数必然偏大。
 *      业务要改时刻在页面上改，不必重启后端。
 *
 * 通道 = 钉钉群自定义机器人 webhook（与「物流转运异常」同一套，只发 text、不发附件）。
 * 配置分两层存（与 yydNotificationCenterSettings 同一套做法）：
 *   · 普通字段 → 本地库 `system_config`，key = warehouse_ship_timeliness_notify_config
 *   · 加签密钥 → resilientSecretStore（system_secrets + 用户目录备份文件）
 *
 * 状态另存一份（key = warehouse_ship_timeliness_notify_state），按 `<日期>|<轮次键>` 去重 ——
 * 服务重启、每分钟 tick 重复触发都不会重复轰炸；页面「立即推送」才强制重发。
 */

const database = require('../config/database');
const {
  getResilientSecret,
  saveResilientSecret,
} = require('./resilientSecretStore');

const CONFIG_KEY = 'warehouse_ship_timeliness_notify_config';
const SECRET_KEY = 'warehouse_ship_timeliness_notify_webhook_secret';
const STATE_KEY = 'warehouse_ship_timeliness_notify_state';

// 两个轮次的默认推送时刻（核验 13:00 / 18:00 + 5 分钟，见文件头说明）
const DEFAULT_SEND_TIME_NOON = '13:05';
const DEFAULT_SEND_TIME_AFTERNOON = '18:05';

// 明细条数：text 上限 20000 字节，30 条中文明细约 9~12KB，留足余量
const DEFAULT_MAX_DETAIL_ROWS = 30;
const MAX_DETAIL_ROWS_LIMIT = 50;

// 页面地址（消息末尾「查看全部」用）。生产入口带 8443，别写成裸域名
const DEFAULT_PAGE_URL = process.env.WST_PAGE_URL
  || 'https://ck.yydd.ai:8443/planning/operation/warehouse-ship-timeliness';

const CACHE_TTL_MS = 30 * 1000;

// 状态里最多保留多少条「日期|轮次」记录（一天两条，30 天足够，避免 system_config 无限长）
const MAX_STATE_ENTRIES = 60;

let cachedConfig = null;
let cachedAt = 0;

function normalizeText(value, maxLength = 512) {
  return String(value ?? '').trim().slice(0, maxLength);
}

function safeJsonParse(value, fallback = {}) {
  if (value && typeof value === 'object') return value;
  try { return JSON.parse(value || '{}'); } catch (_error) { return fallback; }
}

function maskSecret(value) {
  const text = normalizeText(value);
  if (!text) return '';
  if (text.length <= 8) return `${text.slice(0, 2)}******`;
  return `${text.slice(0, 4)}${'*'.repeat(Math.min(10, text.length - 8))}${text.slice(-4)}`;
}

/** HH:mm（00:00 ~ 23:59）；非法输入退回默认值，不抛错（避免把定时任务配挂） */
function normalizeSendTime(value, fallback = DEFAULT_SEND_TIME_NOON) {
  const text = normalizeText(value, 5);
  if (/^([01]\d|2[0-3]):[0-5]\d$/.test(text)) return text;
  return fallback;
}

/** 明细条数：0 = 只发汇总不带明细；上限 50（再多多半会被钉钉截断） */
function normalizeMaxDetailRows(value) {
  const num = Number(value);
  if (!Number.isFinite(num)) return DEFAULT_MAX_DETAIL_ROWS;
  return Math.max(0, Math.min(MAX_DETAIL_ROWS_LIMIT, Math.round(num)));
}

function normalizePageUrl(value) {
  const text = normalizeText(value, 1024);
  if (!text) return DEFAULT_PAGE_URL;
  try {
    const url = new URL(text);
    if (!/^https?:$/.test(url.protocol)) return DEFAULT_PAGE_URL;
    return url.toString();
  } catch (_error) {
    return DEFAULT_PAGE_URL;
  }
}

function normalizeBoolean(value, fallback = false) {
  if (value === undefined || value === null || value === '') return fallback;
  if (typeof value === 'boolean') return value;
  const text = String(value).trim().toLowerCase();
  if (['1', 'true', 'yes', 'on'].includes(text)) return true;
  if (['0', 'false', 'no', 'off'].includes(text)) return false;
  return fallback;
}

async function upsertConfigRow(value) {
  const rows = await database.local.query(
    'SELECT id FROM system_config WHERE config_key = ? LIMIT 1',
    [CONFIG_KEY]
  );
  const text = JSON.stringify(value);
  if (rows[0]) {
    await database.local.query(
      'UPDATE system_config SET config_value = ?, config_type = ? WHERE config_key = ?',
      [text, 'json', CONFIG_KEY]
    );
  } else {
    await database.local.insert('system_config', {
      config_key: CONFIG_KEY,
      config_value: text,
      config_type: 'json',
    });
  }
}

async function readConfigRow() {
  try {
    const rows = await database.local.query(
      'SELECT config_value AS configValue FROM system_config WHERE config_key = ? LIMIT 1',
      [CONFIG_KEY]
    );
    return safeJsonParse(rows[0]?.configValue, {});
  } catch (error) {
    console.warn('[WstNotify] 读取推送配置失败:', error.message);
    return {};
  }
}

/** 运行期配置（含明文加签密钥）—— 只给服务端用，不要直接回给前端 */
async function getShipTimelinessNotifyRuntimeConfig({ forceRefresh = false } = {}) {
  if (!forceRefresh && cachedConfig && Date.now() - cachedAt < CACHE_TTL_MS) return { ...cachedConfig };

  const stored = await readConfigRow();
  const secret = await getResilientSecret(SECRET_KEY, {
    legacyValues: [normalizeText(stored.webhookSecret || stored.webhook_secret, 512)],
    fallbackValues: [normalizeText(process.env.WST_NOTIFY_DINGTALK_WEBHOOK_SECRET, 512)],
  });

  cachedConfig = {
    enabled: normalizeBoolean(stored.enabled, false),
    webhookUrl: normalizeText(stored.webhookUrl || stored.webhook_url, 1024)
      || normalizeText(process.env.WST_NOTIFY_DINGTALK_WEBHOOK, 1024),
    webhookSecret: secret.value,
    webhookSecretSource: secret.source,
    // 两轮各自的推送时刻
    noonSendTime: normalizeSendTime(
      stored.noonSendTime || stored.noon_send_time,
      DEFAULT_SEND_TIME_NOON
    ),
    afternoonSendTime: normalizeSendTime(
      stored.afternoonSendTime || stored.afternoon_send_time,
      DEFAULT_SEND_TIME_AFTERNOON
    ),
    maxDetailRows: normalizeMaxDetailRows(stored.maxDetailRows ?? stored.max_detail_rows),
    atAll: normalizeBoolean(stored.atAll ?? stored.at_all, false),
    pageUrl: normalizePageUrl(stored.pageUrl || stored.page_url),
    source: Object.keys(stored).length > 0 ? 'database' : 'default',
  };
  cachedAt = Date.now();
  return { ...cachedConfig };
}

/** 加签密钥是**可选**的（安全设置用「关键词」或「IP 白名单」时不需要）*/
function missingFields(config = {}) {
  const missing = [];
  if (!normalizeText(config.webhookUrl)) missing.push('Webhook 地址');
  return missing;
}

function isShipTimelinessNotifyReady(config = {}) {
  return missingFields(config).length === 0;
}

function toAdminConfig(config = {}) {
  return {
    enabled: config.enabled === true,
    webhookUrl: config.webhookUrl || '',
    webhookSecretConfigured: Boolean(config.webhookSecret),
    webhookSecretPreview: maskSecret(config.webhookSecret),
    webhookSecretSource: config.webhookSecretSource || 'unconfigured',
    noonSendTime: normalizeSendTime(config.noonSendTime, DEFAULT_SEND_TIME_NOON),
    afternoonSendTime: normalizeSendTime(config.afternoonSendTime, DEFAULT_SEND_TIME_AFTERNOON),
    maxDetailRows: normalizeMaxDetailRows(config.maxDetailRows),
    maxDetailRowsLimit: MAX_DETAIL_ROWS_LIMIT,
    atAll: config.atAll === true,
    pageUrl: normalizePageUrl(config.pageUrl),
    ready: isShipTimelinessNotifyReady(config),
    missingFields: missingFields(config),
    source: config.source || 'default',
  };
}

async function getShipTimelinessNotifyAdminConfig() {
  const config = await getShipTimelinessNotifyRuntimeConfig({ forceRefresh: true });
  return toAdminConfig(config);
}

/**
 * 保存配置。加签密钥留空 = 保持不变（页面上只显示掩码，不要求每次重填）；
 * 想清空加签密钥传 `clearWebhookSecret: true`（切回「关键词」安全设置时用）。
 * 只有 enabled=true 时才强制校验 webhook 齐全 —— 允许先存「关着但填了一半」的草稿。
 */
async function saveShipTimelinessNotifyConfig(input = {}) {
  const current = await getShipTimelinessNotifyRuntimeConfig({ forceRefresh: true });
  const nextSecret = normalizeText(input.webhookSecret || input.webhook_secret, 512);
  const clearSecret = input.clearWebhookSecret === true || input.clear_webhook_secret === true;

  const config = {
    enabled: normalizeBoolean(input.enabled, current.enabled),
    webhookUrl: normalizeText(input.webhookUrl || input.webhook_url, 1024) || current.webhookUrl,
    webhookSecret: clearSecret ? '' : (nextSecret || current.webhookSecret),
    noonSendTime: input.noonSendTime === undefined && input.noon_send_time === undefined
      ? normalizeSendTime(current.noonSendTime, DEFAULT_SEND_TIME_NOON)
      : normalizeSendTime(input.noonSendTime ?? input.noon_send_time, DEFAULT_SEND_TIME_NOON),
    afternoonSendTime: input.afternoonSendTime === undefined && input.afternoon_send_time === undefined
      ? normalizeSendTime(current.afternoonSendTime, DEFAULT_SEND_TIME_AFTERNOON)
      : normalizeSendTime(input.afternoonSendTime ?? input.afternoon_send_time, DEFAULT_SEND_TIME_AFTERNOON),
    maxDetailRows: input.maxDetailRows === undefined && input.max_detail_rows === undefined
      ? normalizeMaxDetailRows(current.maxDetailRows)
      : normalizeMaxDetailRows(input.maxDetailRows ?? input.max_detail_rows),
    atAll: normalizeBoolean(input.atAll ?? input.at_all, current.atAll === true),
    pageUrl: input.pageUrl === undefined && input.page_url === undefined
      ? normalizePageUrl(current.pageUrl)
      : normalizePageUrl(input.pageUrl ?? input.page_url),
  };

  if (config.enabled) {
    const missing = missingFields(config);
    if (missing.length) {
      throw Object.assign(new Error(`开启推送前请先填完整：${missing.join(' / ')}`), { status: 400 });
    }
  }

  if (config.webhookUrl) {
    // 这里只做「像不像」的浅校验；真正的连通性由「测试通道」按钮验证
    const { normalizeWebhookUrl } = require('./dingtalkRobotWebhookSender');
    try {
      config.webhookUrl = normalizeWebhookUrl(config.webhookUrl);
    } catch (error) {
      throw Object.assign(new Error(error.message), { status: 400 });
    }
  }

  if (nextSecret) await saveResilientSecret(SECRET_KEY, nextSecret);
  await upsertConfigRow({
    enabled: config.enabled,
    webhookUrl: config.webhookUrl,
    noonSendTime: config.noonSendTime,
    afternoonSendTime: config.afternoonSendTime,
    maxDetailRows: config.maxDetailRows,
    atAll: config.atAll,
    pageUrl: config.pageUrl,
    updatedAt: new Date().toISOString(),
  });

  cachedConfig = {
    ...config,
    webhookSecretSource: nextSecret ? 'database' : (clearSecret ? 'unconfigured' : (current.webhookSecretSource || 'database')),
    source: 'database',
  };
  cachedAt = Date.now();
  return toAdminConfig(cachedConfig);
}

/**
 * 推送状态。
 * 结构（version 1）：
 *   {
 *     version: 1,
 *     sent: { '2026-10-27|NOON': { sentAt, rowCount, listedCount, bytes, deadline } , ... },
 *     lastSentAt, lastStatus, lastError, lastFailedAt, lastRoundLabel
 *   }
 * sent 只保留最近 MAX_STATE_ENTRIES 条（一天两轮，30 天足够）。
 */
async function loadShipTimelinessNotifyState() {
  try {
    const rows = await database.local.query(
      'SELECT config_value AS configValue FROM system_config WHERE config_key = ? LIMIT 1',
      [STATE_KEY]
    );
    const state = safeJsonParse(rows[0]?.configValue, {});
    if (!state || typeof state !== 'object') return {};
    return { ...state, sent: (state.sent && typeof state.sent === 'object') ? state.sent : {} };
  } catch (error) {
    console.warn('[WstNotify] 读取推送状态失败:', error.message);
    return {};
  }
}

/** 去重键：`<北京日期>|<轮次键>` —— 一天两轮各自独立 */
function buildPushSlot(dateKey, roundKey) {
  const date = normalizeText(dateKey, 10);
  const round = normalizeText(roundKey, 20).toUpperCase();
  if (!date || !round) return '';
  return `${date}|${round}`;
}

async function saveShipTimelinessNotifyState(next = {}) {
  const value = JSON.stringify(next && typeof next === 'object' ? next : {});
  try {
    const rows = await database.local.query(
      'SELECT id FROM system_config WHERE config_key = ? LIMIT 1',
      [STATE_KEY]
    );
    if (rows[0]) {
      await database.local.query(
        'UPDATE system_config SET config_value = ?, config_type = ? WHERE config_key = ?',
        [value, 'json', STATE_KEY]
      );
    } else {
      await database.local.insert('system_config', {
        config_key: STATE_KEY,
        config_value: value,
        config_type: 'json',
      });
    }
  } catch (error) {
    console.warn('[WstNotify] 保存推送状态失败:', error.message);
  }
}

/** 把 sent 裁剪到 MAX_STATE_ENTRIES 条，按 slot 日期倒序保留（新日期优先） */
function trimSentMap(sent = {}) {
  const entries = Object.entries(sent || {});
  if (entries.length <= MAX_STATE_ENTRIES) return sent;
  entries.sort((a, b) => {
    const da = String(a[1]?.sentAt || '');
    const db = String(b[1]?.sentAt || '');
    return db.localeCompare(da);
  });
  return Object.fromEntries(entries.slice(0, MAX_STATE_ENTRIES));
}

function clearShipTimelinessNotifyConfigCache() {
  cachedConfig = null;
  cachedAt = 0;
}

module.exports = {
  CONFIG_KEY,
  DEFAULT_MAX_DETAIL_ROWS,
  DEFAULT_PAGE_URL,
  DEFAULT_SEND_TIME_AFTERNOON,
  DEFAULT_SEND_TIME_NOON,
  MAX_DETAIL_ROWS_LIMIT,
  MAX_STATE_ENTRIES,
  SECRET_KEY,
  STATE_KEY,
  buildPushSlot,
  clearShipTimelinessNotifyConfigCache,
  getShipTimelinessNotifyAdminConfig,
  getShipTimelinessNotifyRuntimeConfig,
  isShipTimelinessNotifyReady,
  loadShipTimelinessNotifyState,
  maskSecret,
  missingFields,
  normalizeMaxDetailRows,
  normalizePageUrl,
  normalizeSendTime,
  saveShipTimelinessNotifyConfig,
  saveShipTimelinessNotifyState,
  toAdminConfig,
  trimSentMap,
};