const fs = require('fs');
const XLSX = require('xlsx');

const files = [
  { file: '大荤.xlsx', cat: '大荤' },
  { file: '小荤.xlsx', cat: '小荤' },
  { file: '素菜.xlsx', cat: '素菜' },
];

const TRAIL_RE = /^(.+?)\s*(\d+(?:\.\d+)?)\s*(斤|只|包|瓶|盒|袋|根)$/;
const LEAD_NUM_RE = /^(\d+(?:\.\d+)?)\s*(斤|只|条|包|瓶|盒)?(.+)$/;
const LEAD_CN_RE = /^([一二三四五六七八九十两]+)\s*(条|斤|只|包)?(.+)$/;
const CN_NUM = { 一: 1, 二: 2, 两: 2, 三: 3, 四: 4, 五: 5, 六: 6, 七: 7, 八: 8, 九: 9, 十: 10 };

function escapeSql(s) {
  return String(s).replace(/\\/g, '\\\\').replace(/'/g, "''");
}

function cleanName(raw) {
  return String(raw || '')
    .replace(/（/g, '(')
    .replace(/）/g, ')')
    .replace(/\s+/g, ' ')
    .trim()
    .replace(/\(斤\)/g, '')
    .replace(/\(盒\)/g, '')
    .replace(/\(块\)/g, '')
    .trim();
}

function parseMaterialCell(nameRaw, qtyRaw) {
  let name = String(nameRaw || '').trim();
  if (!name) return null;

  let qty = qtyRaw === '' || qtyRaw === null || qtyRaw === undefined ? null : qtyRaw;
  let unitHint = null;

  if (typeof qty === 'string') {
    const qm = String(qty).trim().match(/^(\d+(?:\.\d+)?)\s*(斤|只|包|瓶|盒|袋|个)?$/);
    if (qm) {
      qty = Number(qm[1]);
      if (qm[2]) unitHint = qm[2];
    } else if (String(qty).includes('包')) {
      const m = String(qty).match(/(\d+)/);
      qty = m ? Number(m[1]) : null;
      unitHint = '包';
    } else {
      qty = null;
    }
  }

  let m = name.match(TRAIL_RE);
  if (m) {
    return {
      name: cleanName(m[1]),
      quantity: qty != null ? Number(qty) : Number(m[2]),
      unit: m[3],
    };
  }

  if (/^\d/.test(name)) {
    m = name.match(LEAD_NUM_RE);
    if (m && m[3] && /[\u4e00-\u9fa5]/.test(m[3])) {
      // 1.5条肉 -> 条肉
      const matName = m[2] === '条' ? cleanName(m[2] + m[3]) : cleanName(m[3]);
      return {
        name: matName,
        quantity: qty != null ? Number(qty) : Number(m[1]),
        unit: m[2] === '条' ? '条' : m[2] || '斤',
      };
    }
  }

  m = name.match(LEAD_CN_RE);
  if (m && m[3] && CN_NUM[m[1]]) {
    // 两条肉 -> 条肉
    const matName = m[2] === '条' ? cleanName(m[2] + m[3]) : cleanName(m[3]);
    return {
      name: matName,
      quantity: qty != null ? Number(qty) : CN_NUM[m[1]],
      unit: m[2] || '条',
    };
  }

  // 黑木耳0
  name = name.replace(/([\u4e00-\u9fa5])0+$/u, '$1').trim();
  const n = cleanName(name);
  if (!n) return null;

  let unit = unitHint || '斤';
  if ((n === '鸡蛋' || n === '鹌鹑蛋') && qty != null && Number(qty) >= 1) unit = '个';

  return {
    name: n,
    quantity: qty != null && !Number.isNaN(Number(qty)) ? Number(qty) : null,
    unit,
  };
}

const materialMap = new Map();
const recipes = [];
let matSeq = 904000001;
let recipeSeq = 905000001;
let linkSeq = 906000001;

function getOrCreateMaterial(parsed) {
  const key = parsed.name;
  if (!materialMap.has(key)) {
    materialMap.set(key, { id: matSeq++, name: key, unit: parsed.unit || '斤' });
  } else {
    const cur = materialMap.get(key);
    if (cur.unit === '斤' && parsed.unit && parsed.unit !== '斤') cur.unit = parsed.unit;
  }
  return materialMap.get(key);
}

for (const f of files) {
  const wb = XLSX.readFile('C:/Users/Administrator/Desktop/' + f.file);
  const rows = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]], { header: 1, defval: '' });
  for (let i = 1; i < rows.length; i++) {
    const r = rows[i];
    const dishName = String(r[1] || '').trim();
    if (!dishName) continue;

    const mats = [];
    for (let c = 2; c <= 10; c += 2) {
      const parsed = parseMaterialCell(r[c], r[c + 1]);
      if (!parsed || !parsed.name) continue;
      const mat = getOrCreateMaterial(parsed);
      mats.push({
        materialId: mat.id,
        name: mat.name,
        quantity: parsed.quantity,
        sort: mats.length,
      });
    }

    recipes.push({
      id: recipeSeq++,
      name: dishName,
      category: f.cat,
      materials: mats,
    });
  }
}

const out = [];
out.push('-- =============================================');
out.push('-- 客户食材+菜谱导入（大荤/小荤/素菜 Excel）');
out.push('-- 生成时间: ' + new Date().toISOString());
out.push('-- ID 段: 食材 904xxxxxx / 菜谱 905xxxxxx / 明细 906xxxxxx');
out.push('-- 请确认与库中已有 ID 不冲突；tenant_id=1；material_type=2（线上食材）');
out.push('-- 用量：按客户原表“克重”数值写入（业务习惯多为斤），单位写入食材 unit');
out.push('-- 菜谱 remark = 分类（大荤/小荤/素菜）；无食材的菜谱仍导入菜名');
out.push('-- =============================================');
out.push('');
out.push('-- ---------- 1. 食材（' + materialMap.size + ' 种） ----------');
out.push('INSERT INTO `canteen_erp_material`');
out.push('(`id`, `tenant_id`, `dept_id`, `name`, `unit`, `material_type`, `nutrition_tags`, `del_flag`, `create_by`, `create_time`)');
out.push('VALUES');

const mats = [...materialMap.values()].sort((a, b) => a.id - b.id);
mats.forEach((m, idx) => {
  const comma = idx === mats.length - 1 ? ';' : ',';
  out.push(`(${m.id}, 1, NULL, '${escapeSql(m.name)}', '${escapeSql(m.unit)}', 2, NULL, '0', 'admin', NOW())${comma}`);
});

out.push('');
out.push('-- ---------- 2. 排菜菜谱（' + recipes.length + ' 道） ----------');
out.push('INSERT INTO `canteen_menu_recipe`');
out.push('(`id`, `tenant_id`, `dept_id`, `merchant_id`, `name`, `remark`, `status`, `del_flag`, `create_by`, `create_time`)');
out.push('VALUES');
recipes.forEach((r, idx) => {
  const comma = idx === recipes.length - 1 ? ';' : ',';
  out.push(`(${r.id}, 1, NULL, NULL, '${escapeSql(r.name)}', '${escapeSql(r.category)}', 0, '0', 'admin', NOW())${comma}`);
});

out.push('');
out.push('-- ---------- 3. 菜谱食材明细 ----------');
const links = [];
for (const r of recipes) {
  for (const m of r.materials) {
    links.push({
      id: linkSeq++,
      recipeId: r.id,
      materialId: m.materialId,
      quantity: m.quantity,
      sort: m.sort,
      comment: `${r.category}-${r.name}-${m.name}`,
    });
  }
}
out.push('INSERT INTO `canteen_menu_recipe_material` (`id`, `recipe_id`, `material_id`, `quantity`, `sort_order`, `create_time`) VALUES');
links.forEach((l, idx) => {
  let qtySql = 'NULL';
  if (l.quantity != null && !Number.isNaN(l.quantity)) {
    qtySql = Number.isInteger(l.quantity)
      ? l.quantity.toFixed(2)
      : String(Math.round(l.quantity * 1000) / 1000);
  }
  const comma = idx === links.length - 1 ? ';' : ',';
  out.push(`(${l.id}, ${l.recipeId}, ${l.materialId}, ${qtySql}, ${l.sort}, NOW())${comma} -- ${escapeSql(l.comment)}`);
});

out.push('');
out.push('-- 统计: 食材 ' + mats.length + ' / 菜谱 ' + recipes.length + ' / 明细 ' + links.length);
out.push('-- 按分类: ' + files.map((f) => f.cat + '=' + recipes.filter((r) => r.category === f.cat).length).join(', '));

const path = 'C:/workcode/java/biz-api-cloud-zax/db/1030pjcloudx_canteen_customer_recipe_import.sql';
fs.writeFileSync(path, out.join('\n'), 'utf8');
console.log('written', path);
console.log('materials', mats.length, 'recipes', recipes.length, 'links', links.length);
console.log(
  'empty-material recipes:',
  recipes.filter((r) => r.materials.length === 0).map((r) => r.category + ':' + r.name).join(', '),
);
console.log('sample materials:', mats.slice(0, 20).map((m) => m.name + '(' + m.unit + ')').join(', '));