(function () {
  'use strict';

  function toArray(list) {
    return Array.prototype.slice.call(list || []);
  }

  function clearNode(node) {
    while (node && node.firstChild) node.removeChild(node.firstChild);
  }

  function addText(parent, tag, text, className) {
    var element = document.createElement(tag);
    if (className) element.className = className;
    element.textContent = text;
    parent.appendChild(element);
    return element;
  }

  function addList(parent, items) {
    var list = document.createElement('ul');
    items.forEach(function (item) {
      addText(list, 'li', item);
    });
    parent.appendChild(list);
  }

  function addResultBlock(parent, title, items) {
    var block = document.createElement('section');
    block.className = 'dv2-result-block';
    addText(block, 'strong', title);
    addList(block, items);
    parent.appendChild(block);
  }

  function setLoading(result) {
    clearNode(result);
    result.dataset.state = 'loading';
    result.setAttribute('aria-busy', 'true');
    addText(result, 'h3', '正在整理候选路径');
    addText(result, 'p', '系统正在把输入转成风险项和待验证清单。');
  }

  function setError(result, message) {
    clearNode(result);
    result.dataset.state = 'error';
    result.setAttribute('aria-busy', 'false');
    addText(result, 'h3', '请补全必要条件');
    addText(result, 'p', message);
  }

  function beginResult(result, title, summary) {
    clearNode(result);
    result.dataset.state = 'result';
    result.setAttribute('aria-busy', 'false');
    addText(result, 'h3', title);
    addText(result, 'p', summary);
    var grid = document.createElement('div');
    grid.className = 'dv2-result-grid';
    result.appendChild(grid);
    return grid;
  }

  function delayedResult(result, callback) {
    setLoading(result);
    window.setTimeout(callback, 180);
  }

  function read(form, name) {
    var field = form.elements.namedItem(name);
    return field ? String(field.value || '').trim() : '';
  }

  function initLocalFilters() {
    toArray(document.querySelectorAll('[data-dv2-filter-group]')).forEach(function (group) {
      var selector = group.getAttribute('data-dv2-filter-target');
      var items = selector ? toArray(document.querySelectorAll(selector)) : [];
      var controls = toArray(group.querySelectorAll('[data-dv2-filter]'));
      var statusId = group.getAttribute('data-dv2-filter-status');
      var status = statusId ? document.getElementById(statusId) : null;
      if (!items.length || !controls.length) return;

      controls.forEach(function (control) {
        control.addEventListener('click', function () {
          var value = control.getAttribute('data-dv2-filter') || 'all';
          var visible = 0;
          controls.forEach(function (candidate) {
            candidate.setAttribute('aria-pressed', candidate === control ? 'true' : 'false');
          });
          items.forEach(function (item) {
            var values = (item.getAttribute('data-dv2-values') || '').split(/\s+/);
            var show = value === 'all' || values.indexOf(value) !== -1;
            item.hidden = !show;
            if (show) visible += 1;
          });
          if (status) status.textContent = '当前显示 ' + visible + ' 个结构化对象';
        });
      });
    });
  }

  function initMaterialSearch() {
    var search = document.querySelector('[data-material-search]');
    var filters = toArray(document.querySelectorAll('[data-material-filter]'));
    var cards = toArray(document.querySelectorAll('[data-material-card]'));
    var status = document.querySelector('[data-material-status]');
    if (!cards.length || (!search && !filters.length)) return;

    var active = 'all';

    function apply() {
      var query = search ? search.value.trim().toLowerCase() : '';
      var visible = 0;
      cards.forEach(function (card) {
        var category = card.getAttribute('data-material-category') || '';
        var haystack = (card.getAttribute('data-material-search-values') || card.textContent).toLowerCase();
        var show = (active === 'all' || category === active) && (!query || haystack.indexOf(query) !== -1);
        card.hidden = !show;
        if (show) visible += 1;
      });
      if (status) status.textContent = '当前显示 ' + visible + ' 类材料模板。页面未录入具体供应商牌号与性能数值。';
    }

    filters.forEach(function (filter) {
      filter.addEventListener('click', function () {
        active = filter.getAttribute('data-material-filter') || 'all';
        filters.forEach(function (candidate) {
          candidate.setAttribute('aria-pressed', candidate === filter ? 'true' : 'false');
        });
        apply();
      });
    });

    if (search) search.addEventListener('input', apply);
  }

  function initTabs() {
    var tablist = document.querySelector('[data-tool-tabs]');
    if (!tablist) return;
    var tabs = toArray(tablist.querySelectorAll('[role="tab"]'));
    var panels = tabs.map(function (tab) {
      return document.getElementById(tab.getAttribute('aria-controls'));
    });

    function syncHash(tab) {
      var hash = tab.getAttribute('data-tool-hash');
      if (hash && window.history && window.history.replaceState) {
        window.history.replaceState(null, '', '#' + hash);
      }
    }

    function revealTab(tab, immediate) {
      var listBox = tablist.getBoundingClientRect();
      var tabBox = tab.getBoundingClientRect();
      var delta = 0;
      if (tabBox.left < listBox.left) delta = tabBox.left - listBox.left;
      if (tabBox.right > listBox.right) delta = tabBox.right - listBox.right;
      if (!delta) return;
      var reduceMotion = window.matchMedia && window.matchMedia('(prefers-reduced-motion: reduce)').matches;
      tablist.scrollTo({ left: tablist.scrollLeft + delta, behavior: immediate || reduceMotion ? 'auto' : 'smooth' });
    }

    function activate(tab, focus, updateHash, reveal, immediateReveal) {
      tabs.forEach(function (candidate, index) {
        var selected = candidate === tab;
        candidate.setAttribute('aria-selected', selected ? 'true' : 'false');
        candidate.tabIndex = selected ? 0 : -1;
        if (panels[index]) panels[index].hidden = !selected;
      });
      if (focus) tab.focus();
      if (updateHash) syncHash(tab);
      if (reveal) revealTab(tab, immediateReveal);
    }

    tabs.forEach(function (tab, index) {
      tab.addEventListener('click', function () {
        activate(tab, false, true, true);
      });
      tab.addEventListener('keydown', function (event) {
        if (event.key !== 'ArrowRight' && event.key !== 'ArrowLeft' && event.key !== 'Home' && event.key !== 'End') return;
        event.preventDefault();
        var next = index;
        if (event.key === 'ArrowRight') next = (index + 1) % tabs.length;
        if (event.key === 'ArrowLeft') next = (index - 1 + tabs.length) % tabs.length;
        if (event.key === 'Home') next = 0;
        if (event.key === 'End') next = tabs.length - 1;
        activate(tabs[next], true, true, true);
      });
    });

    function activateFromHash() {
      var requestedHash = window.location.hash.replace(/^#/, '');
      if (!requestedHash) return;
      var requestedTab = tabs.find(function (tab) {
        return tab.getAttribute('data-tool-hash') === requestedHash;
      });
      if (requestedTab) activate(requestedTab, false, false, true, true);
    }

    activateFromHash();
    window.addEventListener('hashchange', activateFromHash);
  }

  function initDomainTabs() {
    var controls = toArray(document.querySelectorAll('[data-domain-tab]'));
    var panels = toArray(document.querySelectorAll('[data-domain-panel]'));
    if (!controls.length || !panels.length) return;
    controls.forEach(function (control) {
      control.addEventListener('click', function () {
        var target = control.getAttribute('data-domain-tab');
        controls.forEach(function (candidate) {
          candidate.setAttribute('aria-pressed', candidate === control ? 'true' : 'false');
        });
        panels.forEach(function (panel) {
          panel.hidden = panel.getAttribute('data-domain-panel') !== target;
        });
      });
    });
  }

  function initPaperSelector() {
    var form = document.querySelector('[data-paper-selector]');
    if (!form) return;
    var result = document.querySelector('[data-paper-result]');

    form.addEventListener('submit', function (event) {
      event.preventDefault();
      var formFactor = read(form, 'paper_form');
      var contents = read(form, 'paper_contents');
      var process = read(form, 'paper_process');
      var endPath = read(form, 'paper_end');
      if (!formFactor || !contents || !process || !endPath) {
        setError(result, '包装形态、内容物、关键加工和终端目标均为必要输入。');
        return;
      }

      delayedResult(result, function () {
        var candidates = [];
        var risks = [];
        var structure = [];
        var tests = [];

        if (formFactor === 'rigid') candidates.push('食品餐饮具卡纸、FBB 或 SBS/SBB 类纸板');
        if (formFactor === 'flexible') candidates.push('单面光牛皮薄纸、防油纸或柔性包装原纸');
        if (formFactor === 'molded') candidates.push('湿压精密纸浆模塑或热成型纤维结构');
        if (formFactor === 'medical') candidates.push('与实际包装用途匹配的医用纸或高性能特种纸');
        if (formFactor === 'industrial') candidates.push('高强牛皮纸、结构纸板或特种功能纸');

        if (contents === 'oil') {
          risks.push('油脂类型、温度和接触时间会改变耐油需求');
          structure.push('优先评估封孔底涂与耐油功能层');
          tests.push('Kit 筛查及实际油脂接触测试');
        }
        if (contents === 'liquid') {
          risks.push('切边吸液、折痕开裂和封口泄漏');
          structure.push('评估封孔、耐液体层和边缘管理');
          tests.push('Cobb、渗漏、边缘吸液和完整包装测试');
        }
        if (contents === 'aroma') {
          risks.push('香气透过、吸附和内容物相容性');
          structure.push('评估阻氧、保香与内容物接触层');
          tests.push('OTR、保香、感官和相容性测试');
        }
        if (contents === 'dry') {
          risks.push('水汽敏感性与粉体穿漏需要按产品确认');
          structure.push('根据货架期评估阻湿层和封口结构');
          tests.push('WVTR、封口完整性和储存验证');
        }
        if (contents === 'none') {
          risks.push('二级或运输包装仍需确认湿热、摩擦和物流风险');
          structure.push('根据表面与结构目标选择底涂或保护层');
          tests.push('湿热老化、耐磨及运输相关测试');
        }

        if (process === 'fold') {
          risks.push('压痕和折叠可能破坏连续涂层');
          tests.push('折痕后阻隔保持与纤维开裂检查');
        }
        if (process === 'seal') {
          risks.push('纸面锚固、热封窗口和 Hot Tack 需共同验证');
          structure.push('评估独立热封层或兼具封合功能的表面层');
          tests.push('起封温度、封口强度、Hot Tack 和老化后封合');
        }
        if (process === 'forming') {
          risks.push('成型应变、曲率和局部密度会改变涂层完整性');
          tests.push('成型后完整包装、凹角、翻边和切边检查');
        }
        if (process === 'print') {
          risks.push('油墨、光油和涂层之间可能出现附着或迁移问题');
          tests.push('油墨附着、耐磨、感官及法规结构复核');
        }

        if (endPath === 'recycle') tests.push('完整印刷涂布制品的目标市场可回收性评价');
        if (endPath === 'industrial') tests.push('完整制品工业堆肥路径及认证机构适用性预审');
        if (endPath === 'home') tests.push('完整制品家庭堆肥路径预审，不由原料属性外推');
        if (endPath === 'undecided') risks.push('终端路径未确定，不能提前使用可回收或可堆肥声明');

        var grid = beginResult(result, '候选纸材与验证路径', '这是结构化初筛，不是材料适用性、法规符合性或认证结论。');
        addResultBlock(grid, '候选纸材类别', candidates);
        addResultBlock(grid, '主要风险', risks);
        addResultBlock(grid, '建议结构方向', structure.length ? structure : ['先完成纸面、孔隙、吸收与加工条件表征']);
        addResultBlock(grid, '建议验证组合', tests);
      });
    });
  }

  function initBarrierConfigurator() {
    var form = document.querySelector('[data-barrier-config]');
    if (!form) return;
    var result = document.querySelector('[data-barrier-result]');

    form.addEventListener('submit', function (event) {
      event.preventDefault();
      var sensitivity = read(form, 'barrier_sensitivity');
      var oil = read(form, 'barrier_oil');
      var seal = read(form, 'barrier_seal');
      var climate = read(form, 'barrier_climate');
      if (!sensitivity || !oil || !seal || !climate) {
        setError(result, '敏感性、油脂条件、封口方式和温湿度场景均需选择。');
        return;
      }

      delayedResult(result, function () {
        var functions = [];
        var conditions = [];
        var tests = [];
        var missing = ['包装尺寸与表面积', '目标货架期及允许损耗', '完整层结构与涂布量'];

        if (sensitivity === 'moisture' || sensitivity === 'combined') {
          functions.push('阻湿');
          conditions.push('WVTR 必须绑定温度、相对湿度、方向和样品状态');
          tests.push('材料 WVTR 与完整包装储存验证');
        }
        if (sensitivity === 'oxygen' || sensitivity === 'combined') {
          functions.push('阻氧');
          conditions.push('OTR 必须绑定温度、湿度、氧浓度与测试方向');
          tests.push('材料 OTR 与氧敏感内容物验证');
        }
        if (sensitivity === 'aroma' || sensitivity === 'combined') {
          functions.push('保香与低吸附');
          conditions.push('明确目标香气物质、浓度、时间和内容物相容性');
          tests.push('保香、吸附、感官与相容性测试');
        }
        if (oil === 'yes') {
          functions.push('耐油脂');
          conditions.push('明确油脂类型、温度、接触时间与切边状态');
          tests.push('Kit 筛查及实际油脂渗透测试');
        }
        if (seal === 'yes') {
          functions.push('热封');
          conditions.push('记录温度、压力、时间、设备和封合面');
          tests.push('起封温度、封口强度、Hot Tack 与封合窗口');
        }
        if (climate === 'cold') {
          conditions.push('纳入低温、冷凝水和冻融影响');
          tests.push('低温弯折、冷凝水与封口完整性');
        }
        if (climate === 'humid') {
          conditions.push('纳入高湿吸湿、挺度和涂层塑化风险');
          tests.push('湿热老化、挺度保持和阻隔保持');
        }
        if (climate === 'hot') {
          conditions.push('纳入热接触、热油或热灌装条件');
          tests.push('热接触、迁移、渗漏和结构稳定性');
        }

        var grid = beginResult(result, '初步功能地图', '工具不会自动生成权威 OTR、WVTR 或货架期数值。数值目标需要产品模型与工程师确认。');
        addResultBlock(grid, '需要的功能模块', functions.length ? functions : ['基础表面保护与完整性']);
        addResultBlock(grid, '必须锁定的条件', conditions);
        addResultBlock(grid, '建议测试层级', tests);
        addResultBlock(grid, '当前仍缺输入', missing);
      });
    });
  }

  function initCertificationNavigator() {
    var form = document.querySelector('[data-cert-navigator]');
    if (!form) return;
    var result = document.querySelector('[data-cert-result]');

    form.addEventListener('submit', function (event) {
      event.preventDefault();
      var market = read(form, 'cert_market');
      var route = read(form, 'cert_route');
      var structure = read(form, 'cert_structure');
      if (!market || !route || !structure) {
        setError(result, '目标市场、终端路径和完整结构类型均为必要输入。');
        return;
      }

      delayedResult(result, function () {
        var paths = [];
        var required = ['完整产品结构及各层材料', '最大厚度或涂布量', '油墨、光油和黏合剂信息', '产品版本和目标市场'];
        var boundaries = ['工具输出是初步路径判断', '最终适用标准与证书范围由认证机构确认', '当地收集和处理系统需单独核实'];

        if (route === 'recycle') {
          paths.push(market === 'eu' ? 'CEPI V3 测试方法结合 4evergreen 或目标市场评价协议' : '目标市场纸基包装可回收性方法与收集现实评估');
          required.push('完整印刷涂布制品样品及实验室报告');
          boundaries.push('技术可回收性不自动保证每个地区收集');
        }
        if (route === 'industrial') {
          if (market === 'eu') paths.push('EN 13432 路径，可咨询 DIN CERTCO、TÜV AUSTRIA 或 Seedling 授权体系');
          if (market === 'us') paths.push('BPI 商业堆肥路径，以 ASTM D6400 为基础，D6868 或 D8410 是否适用由技术审查决定');
          if (market === 'au') paths.push('AS 4736 与 ABA 商业堆肥认证路径');
          if (market === 'cn') paths.push('先确认目标处置设施、适用标准与认证方案，不套用其他市场标识');
          required.push('崩解、生物降解、生态毒性及成分要求资料');
        }
        if (route === 'home') {
          if (market === 'us') paths.push('BPI 家庭堆肥路径基于 NF T 51-800，并以商业堆肥认证为前提');
          if (market === 'eu') paths.push('家庭堆肥方案需按目标认证计划确认，不使用 EN 13432 工业堆肥证书替代');
          if (market === 'au') paths.push('AS 5810 与 ABA 家庭堆肥认证路径');
          if (market === 'cn') paths.push('先确认目标市场的家庭堆肥标准和标识使用规则');
          required.push('完整产品家庭堆肥测试和正式标识授权');
          boundaries.push('工业堆肥证书不能证明家庭堆肥');
        }
        if (route === 'biobased') {
          paths.push('ASTM D6866 或目标计划认可方法用于生物基碳含量');
          required.push('明确被测对象及总有机碳边界');
          boundaries.push('生物基含量不证明可降解、可堆肥、可回收或低碳');
        }
        if (structure === 'thermoplastic') boundaries.push('含热塑性层时，部分纤维素基堆肥评价路径可能不适用');

        var grid = beginResult(result, '可能适用的认证与评价路径', '在正式送检或申请前，应由目标机构确认结构、方法、版本和标识范围。');
        addResultBlock(grid, '候选路径', paths);
        addResultBlock(grid, '需准备的资料', required);
        addResultBlock(grid, '不能外推的边界', boundaries);
        addResultBlock(grid, '下一步', ['形成产品结构表', '锁定标准版本', '向认证机构申请技术预审', '建立变更控制记录']);
      });
    });
  }

  var claimRules = [
    {
      pattern: /FDA认证|FDA\s*食品级|食品级/gi,
      term: '食品级或 FDA 认证',
      issue: '缺少目标市场、具体用途、食品类型、接触温度、时间和组分授权路径。',
      rewrite: '改为针对指定用途完成相应食品接触法规路径评估，并显示适用条件。'
    },
    {
      pattern: /PFAS为零|绝对无氟|全氟为零|无氟/gi,
      term: '无氟或 PFAS 为零',
      issue: '配方声明、供应链文件、总氟筛查和目标 PFAS 分析不是同一证据。',
      rewrite: '如证据充分，可写无有意添加 PFAS，并同步披露对象、版本和检测状态。'
    },
    {
      pattern: /100%可降解|完全可降解|可降解/gi,
      term: '可降解',
      issue: '缺少环境、时间、标准、完整产品结构和测试或认证状态。',
      rewrite: '说明工业或家庭堆肥等具体路径、标准、证书范围和当地处理条件。'
    },
    {
      pattern: /家庭可堆肥|家庭堆肥|家庭可降解/gi,
      term: '家庭堆肥',
      issue: '家庭堆肥不能由工业堆肥证书、树脂证书或材料属性外推。',
      rewrite: '仅在最终产品取得对应家庭堆肥证书并有标识授权时使用。'
    },
    {
      pattern: /可回收|可再浆/gi,
      term: '可回收或可再浆',
      issue: '两者不是同义词，并需绑定完整包装、测试方法、评价协议与目标市场。',
      rewrite: '描述在指定实验室流程下的再制浆表现，或按目标协议完成的技术可回收性评价。'
    },
    {
      pattern: /生物基/gi,
      term: '生物基',
      issue: '应明确被声明对象和生物基碳或质量口径，不能推导可降解、低碳或食品接触。',
      rewrite: '绑定具体样品和认可方法报告，单独说明生物基含量边界。'
    },
    {
      pattern: /医疗级|符合ISO\s*11607|ISO\s*11607/gi,
      term: '医疗级或 ISO 11607',
      issue: 'ISO 11607 仅适用于终末灭菌医疗器械的特定包装系统与过程验证。',
      rewrite: '普通药盒或医疗外包装不得笼统使用该表述，特定项目需完成完整验证。'
    },
    {
      pattern: /抑菌|抗菌|抗病毒/gi,
      term: '抑菌或抗病毒',
      issue: '材料名称不能自动证明主动防护功效。',
      rewrite: '需明确活性成分、对象、方法、接触时间、耐久、迁移毒理和监管属性。'
    },
    {
      pattern: /低碳|更环保|零污染|绿色环保/gi,
      term: '低碳或环保',
      issue: '缺少功能单位、系统边界、基准方案和经审查的生命周期证据。',
      rewrite: '改为描述具体材料路径、减量目标或验证中的环境属性。'
    }
  ];

  function initClaimChecker() {
    var form = document.querySelector('[data-claim-checker]');
    if (!form) return;
    var result = document.querySelector('[data-claim-result]');

    form.addEventListener('submit', function (event) {
      event.preventDefault();
      var text = read(form, 'claim_text');
      if (!text) {
        setError(result, '请输入拟公开的产品标题、广告语或技术声明。');
        return;
      }

      delayedResult(result, function () {
        var findings = claimRules.filter(function (rule) {
          rule.pattern.lastIndex = 0;
          return rule.pattern.test(text);
        });
        clearNode(result);
        result.setAttribute('aria-busy', 'false');
        result.dataset.state = 'result';
        addText(result, 'h3', findings.length ? '发现 ' + findings.length + ' 类声明风险' : '未命中首版高风险词典');
        addText(result, 'p', findings.length ? '请按对象、结构、条件、方法、市场、证据和边界逐项补全。' : '这不代表声明已经合规或可发布，仍需专业人员核验具体语境和证据。');

        if (findings.length) {
          var container = document.createElement('div');
          container.className = 'dv2-claim-findings';
          findings.forEach(function (finding) {
            var item = document.createElement('article');
            item.className = 'dv2-finding';
            addText(item, 'strong', finding.term);
            addText(item, 'p', '风险：' + finding.issue);
            addText(item, 'p', '建议：' + finding.rewrite);
            container.appendChild(item);
          });
          result.appendChild(container);
        }
      });
    });
  }

  function initRegistryDemo() {
    var registry = document.querySelector('[data-registry-demo]');
    if (!registry) return;
    var control = registry.querySelector('[data-registry-check]');
    var result = registry.querySelector('[data-registry-result]');
    if (!control || !result) return;
    control.addEventListener('click', function () {
      result.hidden = false;
      result.focus();
    });
  }

  document.addEventListener('DOMContentLoaded', function () {
    initLocalFilters();
    initMaterialSearch();
    initTabs();
    initDomainTabs();
    initPaperSelector();
    initBarrierConfigurator();
    initCertificationNavigator();
    initClaimChecker();
    initRegistryDemo();
  });
}());