// expense.js — 费用管理模块

function renderExpense() {
  var records = state.data.expense || [];
  var money = function(v) { return '¥ ' + (Number(v || 0)).toLocaleString('zh-CN', { minimumFractionDigits: 0, maximumFractionDigits: 2 }); };
  var esc = function(s) { return (s || '').replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;'); };
  var EXPENSE_TYPES = ['通用费用','平台采购','人力成本','研发费用','奖金','其他'];

  // 筛选状态
  var view = state.expenseView || 'total';
  var typeFilter = state.expenseFilter || '全部';
  var filtered = typeFilter === '全部' ? records : records.filter(function(r) { return r.expense_type === typeFilter; });

  // 视图数据预处理
  var now = new Date();
  var thisYear = now.getFullYear();
  var defaultMonth = thisYear + '-' + String(now.getMonth() + 1).padStart(2, '0');

  if (!state.expenseMonth) state.expenseMonth = defaultMonth;
  if (state.expenseQuarter === '') state.expenseQuarter = String(Math.floor(now.getMonth() / 3));

  // 月度筛选
  if (view === 'monthly') {
    filtered = filtered.filter(function(r) { return r.expense_month === state.expenseMonth; });
  }

  // 季度筛选
  if (view === 'quarterly') {
    var q = parseInt(state.expenseQuarter) || 0;
    var qRanges = [[1,2,3],[4,5,6],[7,8,9],[10,11,12]];
    var qRange = qRanges[q];
    filtered = filtered.filter(function(r) {
      var m = parseInt((r.expense_month || '0').substring(5)) || 0;
      return qRange.indexOf(m) >= 0;
    });
  }

  var totalAmount = filtered.reduce(function(s, r) { return s + (r.amount || 0); }, 0);
  var totalIncurred = filtered.reduce(function(s, r) { return s + (r.incurred_amount || 0); }, 0);

  // 月份下拉选项（去年/今年/明年）
  var monthOpts = '<option value="">请选择</option>';
  for (var yr = thisYear - 1; yr <= thisYear + 1; yr++)
    for (var m = 1; m <= 12; m++) {
      var mv = yr + '-' + String(m).padStart(2, '0');
      monthOpts += '<option value="' + mv + '"' + (mv === state.expenseMonth ? ' selected' : '') + '>' + mv + '</option>';
    }

  // 季度下拉
  var qLabels = ['Q1 (1-3月)','Q2 (4-6月)','Q3 (7-9月)','Q4 (10-12月)'];
  var quarterOpts = '';
  for (var qi = 0; qi < 4; qi++) {
    quarterOpts += '<option value="' + qi + '"' + (String(qi) === state.expenseQuarter ? ' selected' : '') + '>' + qLabels[qi] + '</option>';
  }

  // 月份/季度日期选择器
  var dateSelect = '';
  if (view === 'monthly') {
    dateSelect = '<span class="text-xs text-slate-500 ml-2">月份：</span><select onchange="setExpenseMonth(this.value)" class="text-xs font-medium py-1 px-2.5 cursor-pointer" style="appearance:none;-webkit-appearance:none;background-color:transparent;border:0;outline:none;background:url(&apos;data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%2212%22 height=%2212%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%236b7280%22 stroke-width=%222%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpolyline points=%226 9 12 15 18 9%22%3E%3C/polyline%3E%3C/svg%3E&apos;) no-repeat right 4px center;padding-right:22px;min-height:30px">' + monthOpts + '</select>';
  } else if (view === 'quarterly') {
    dateSelect = '<span class="text-xs text-slate-500 ml-2">季度：</span><select onchange="setExpenseQuarter(this.value)" class="text-xs font-medium py-1 px-2.5 cursor-pointer" style="appearance:none;-webkit-appearance:none;background-color:transparent;border:0;outline:none;background:url(&apos;data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%2212%22 height=%2212%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%236b7280%22 stroke-width=%222%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpolyline points=%226 9 12 15 18 9%22%3E%3C/polyline%3E%3C/svg%3E&apos;) no-repeat right 4px center;padding-right:22px;min-height:30px">' + quarterOpts + '</select>';
  }

  // Toolbar
  var toolbar = '<span class="text-xs text-slate-500">视图：</span><select onchange="setExpenseView(this.value)" class="text-xs font-medium py-1 px-2.5 cursor-pointer" style="appearance:none;-webkit-appearance:none;background-color:transparent;border:0;outline:none;background:url(&apos;data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%2212%22 height=%2212%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%236b7280%22 stroke-width=%222%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpolyline points=%226 9 12 15 18 9%22%3E%3C/polyline%3E%3C/svg%3E&apos;) no-repeat right 4px center;padding-right:22px;min-height:30px"><option value="total"' + (view==='total'?' selected':'') + '>总视图</option><option value="quarterly"' + (view==='quarterly'?' selected':'') + '>季度视图</option><option value="monthly"' + (view==='monthly'?' selected':'') + '>月度视图</option></select><span class="text-xs text-slate-500 ml-3">类型：</span><select onchange="setExpenseFilter(this.value)" class="text-xs font-medium py-1 px-2.5 cursor-pointer" style="appearance:none;-webkit-appearance:none;background-color:transparent;border:0;outline:none;background:url(&apos;data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%2212%22 height=%2212%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%236b7280%22 stroke-width=%222%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpolyline points=%226 9 12 15 18 9%22%3E%3C/polyline%3E%3C/svg%3E&apos;) no-repeat right 4px center;padding-right:22px;min-height:30px"><option value="全部"' + (typeFilter==='全部'?' selected':'') + '>全部 (' + records.length + ')</option>';
  EXPENSE_TYPES.forEach(function(t) {
    toolbar += '<option value="' + t + '"' + (typeFilter===t?' selected':'') + '>' + t + ' (' + records.filter(function(r){return r.expense_type===t}).length + ')</option>';
  });
  toolbar += '</select>' + dateSelect;

  // 表格行
  var tableRows = '';
  if (filtered.length) {
    filtered.forEach(function(r) {
      tableRows += '<tr class="border-b border-slate-100 hover:bg-slate-50 cursor-pointer" onclick="openExpenseEdit(' + r.id + ')"><td class="p-2 font-medium text-center align-middle" style="width:200px">' + esc(r.expense_type) + '</td><td class="p-2 text-center align-middle" style="width:200px">' + (r.expense_month || '—') + '</td><td class="p-2 text-center align-middle font-medium" style="width:200px">' + money(r.amount) + '</td><td class="p-2 text-center align-middle font-medium" style="width:200px">' + money(r.incurred_amount) + '</td><td class="p-2 text-center align-middle text-slate-500" style="width:200px">' + (esc(r.notes) || '—') + '</td></tr>';
    });
  } else {
    var emptyMsg = view === 'monthly' ? '该月份暂无费用记录' : view === 'quarterly' ? '该季度暂无费用记录' : '暂无费用记录';
    tableRows = '<tr><td colspan="5" class="p-6 text-center text-slate-400">' + emptyMsg + '</td></tr>';
  }

  // 模态框
  var modal = '<div id="expenseModal" class="hidden fixed inset-0 z-50 flex items-center justify-center bg-black/40" onclick="closeExpenseModal()"><div class="bg-white rounded-2xl shadow-2xl w-full max-w-lg mx-4" onclick="event.stopPropagation()"><div class="sticky top-0 z-10 bg-white/95 backdrop-blur border-b border-slate-100 px-6 py-4 flex items-center justify-between"><h3 class="text-lg font-bold text-slate-800" id="expenseModalTitle">新增费用</h3><div class="flex items-center gap-2"><button class="btn btn-ghost btn-sm text-red-600 hidden" id="expenseDeleteBtn" onclick="deleteExpenseItem()">删除</button><button class="btn btn-ghost btn-sm rounded-full w-8 h-8 p-0" onclick="closeExpenseModal()"><i data-lucide="x"></i></button></div></div><form onsubmit="saveExpense(event)" class="p-6 grid gap-4" novalidate><input type="hidden" name="expense_id" value=""><div class="grid grid-cols-2 gap-3"><label class="block"><span class="text-xs text-slate-500 mb-1 block">费用类型 <span class="text-red-500">*</span></span><select name="expense_type" required class="form-ctrl bg-white"><option value="">请选择</option>';
  EXPENSE_TYPES.forEach(function(t) { modal += '<option>' + t + '</option>'; });
  modal += '</select></label><label class="block"><span class="text-xs text-slate-500 mb-1 block">月份 <span class="text-red-500">*</span></span><select name="expense_month" required class="form-ctrl bg-white">' + monthOpts + '</select></label></div><div class="grid grid-cols-2 gap-3"><label class="block"><span class="text-xs text-slate-500 mb-1 block">金额（元）</span><input name="amount" type="number" step="0.01" class="form-ctrl" placeholder="0.00"></label><label class="block"><span class="text-xs text-slate-500 mb-1 block">已发生金额（元）</span><input name="incurred_amount" type="number" step="0.01" class="form-ctrl" placeholder="0.00"></label></div><label class="block"><span class="text-xs text-slate-500 mb-1 block">费用说明</span><textarea name="notes" class="form-ctrl" rows="3" placeholder="备注信息"></textarea></label><div class="flex justify-end gap-3 pt-2"><button type="button" class="btn btn-ghost btn-sm px-6" onclick="closeExpenseModal()">取消</button><button type="submit" class="btn btn-primary btn-sm px-8">保存</button></div></form></div></div>';

  document.querySelector("#expense").innerHTML = '<div class="grid gap-4">' +
    '<div class="card p-3"><div class="flex justify-between items-center"><div class="flex items-center gap-2">' + toolbar + '</div><button class="btn btn-primary btn-sm" onclick="openExpenseModal()">新增费用</button></div></div>' +
    '<div class="grid grid-cols-3 gap-3">' +
      '<div class="metric-card p-3"><span class="flex items-center gap-2 text-xs text-slate-500">费用记录</span><strong class="mt-2 block text-xl">' + filtered.length + '</strong></div>' +
      '<div class="metric-card p-3"><span class="flex items-center gap-2 text-xs text-slate-500">总费用</span><strong class="mt-2 block text-xl">' + money(totalAmount) + '</strong></div>' +
      '<div class="metric-card p-3"><span class="flex items-center gap-2 text-xs text-slate-500">已发生金额</span><strong class="mt-2 block text-xl">' + money(totalIncurred) + '</strong></div>' +
    '</div>' +
    modal +
    '<div class="card p-4"><div class="overflow-x-auto"><table class="w-full text-sm"><thead><tr class="bg-slate-50 border-b border-slate-200"><th class="p-2 text-center font-semibold" style="width:200px">费用类型</th><th class="p-2 text-center font-semibold" style="width:200px">月份</th><th class="p-2 text-center font-semibold" style="width:200px">金额</th><th class="p-2 text-center font-semibold" style="width:200px">已发生金额</th><th class="p-2 text-center font-semibold" style="width:200px">费用说明</th></tr></thead><tbody>' + tableRows + '</tbody></table></div></div>' +
  '</div>';

  if (window.lucide) window.lucide.createIcons();
}

window.setExpenseView = function(v) { state.expenseView = v; renderExpense(); };
window.setExpenseFilter = function(v) { state.expenseFilter = v; renderExpense(); };
window.setExpenseMonth = function(v) { state.expenseMonth = v; renderExpense(); };
window.setExpenseQuarter = function(v) { state.expenseQuarter = v; renderExpense(); };

window.openExpenseModal = function() {
  var form = document.querySelector("#expenseModal form");
  form.reset();
  form.querySelector('[name="expense_id"]').value = "";
  document.querySelector("#expenseModalTitle").textContent = "新增费用";
  document.querySelector("#expenseDeleteBtn").classList.add("hidden");
  document.querySelector("#expenseModal").classList.remove("hidden");
};

window.closeExpenseModal = function() {
  document.querySelector("#expenseModal").classList.add("hidden");
};

window.openExpenseEdit = function(id) {
  var r = (state.data.expense || []).find(function(x) { return x.id === id; });
  if (!r) return;
  var form = document.querySelector("#expenseModal form");
  form.reset();
  var setVal = function(name, val) { var el = form.querySelector('[name="' + name + '"]'); if (el) el.value = val || ""; };
  setVal("expense_id", r.id);
  setVal("expense_type", r.expense_type);
  setVal("expense_month", r.expense_month);
  setVal("amount", r.amount);
  setVal("incurred_amount", r.incurred_amount);
  setVal("notes", r.notes);
  document.querySelector("#expenseModalTitle").textContent = "编辑费用";
  document.querySelector("#expenseDeleteBtn").classList.remove("hidden");
  document.querySelector("#expenseModal").classList.remove("hidden");
};

window.saveExpense = async function(event) {
  event.preventDefault();
  var form = event.target;
  var data = Object.fromEntries(new FormData(form).entries());
  var isEdit = !!data.expense_id;
  delete data.expense_id;

  var id = form.querySelector('[name="expense_id"]').value;
  var url = isEdit ? "/api/expense/" + id : "/api/expense";
  var method = isEdit ? "PUT" : "POST";

  var resp = await fetch(url, { method: method, headers: { "Content-Type": "application/json" }, body: JSON.stringify({ data: Object.assign({}, data, { tenant: state.tenant }) }) });
  if (!resp.ok) { alert("保存失败"); return; }

  var bResp = await fetch("/api/bootstrap?tenant=" + encodeURIComponent(state.tenant));
  if (bResp.ok) {
    var bd = await bResp.json();
    state.data = bd;
    applyUserTenants();
    renderExpense();
  }
  closeExpenseModal();
};

window.deleteExpenseItem = async function() {
  var id = document.querySelector("#expenseModal form [name='expense_id']").value;
  if (!id || !confirm("确定删除？")) return;
  var resp = await fetch("/api/expense/" + id, { method: "DELETE" });
  if (!resp.ok) { alert("删除失败"); return; }
  var bResp = await fetch("/api/bootstrap?tenant=" + encodeURIComponent(state.tenant));
  if (bResp.ok) {
    var bd = await bResp.json();
    state.data = bd;
    applyUserTenants();
    renderExpense();
  }
};