import { useState } from "react";
import { Search, Plus, Filter, ChevronRight, Building, Calendar, DollarSign, Activity, X, Clock, FileText, User, Tag, Link as LinkIcon } from "lucide-react";
import { motion, AnimatePresence } from "motion/react";

export default function Opportunities() {
  const [filter, setFilter] = useState("all");
  const [selectedItem, setSelectedItem] = useState<any | null>(null);

  const oppData = [
    {
      id: "HD-20231024-001",
      name: "A市第一人民医院云桌面扩容",
      client: "A市第一人民医院",
      owner: "张三",
      amount: "1,200,000",
      date: "2023-12-15",
      confidence: 80,
      stage: "招投标",
      type: "扩容",
      pushedToOMS: true,
      product: "VDI云桌面",
      source: "渠道推荐",
      notes: "客户现有500点并发，本次计划扩容300点，主要用于门诊医生工作站。对性能要求较高，需要重点测试3D渲染能力。",
    },
    {
      id: "HB-20231025-002",
      name: "B大学新校区机房建设",
      client: "B大学",
      owner: "李四",
      amount: "3,500,000",
      date: "2024-03-01",
      confidence: 40,
      stage: "方案交流",
      type: "新建",
      pushedToOMS: false,
      product: "VOI云桌面",
      source: "市场活动",
      notes: "新校区规划了5个公共机房，共计800台终端。目前处于方案设计阶段，竞争对手有深信服和锐捷。",
    },
    {
      id: "HN-20231026-003",
      name: "C集团办公云桌面替换",
      client: "C集团",
      owner: "王五",
      amount: "800,000",
      date: "2023-11-30",
      confidence: 90,
      stage: "商务谈判",
      type: "新建",
      pushedToOMS: true,
      product: "IDV云桌面",
      source: "主动开发",
      notes: "替换原有传统PC，客户对数据安全和外设兼容性要求极高。POC测试已通过，目前正在进行价格谈判。",
    },
  ];

  const followUpRecords = [
    { id: 1, date: "2023-10-25 14:30", type: "现场拜访", content: "与信息科主任沟通了扩容需求，确认了具体的点数和预算范围。主任对我们的前期服务比较认可。", user: "张三" },
    { id: 2, date: "2023-10-20 10:00", type: "电话沟通", content: "初步了解了医院近期的信息化建设规划，得知有云桌面扩容的意向。", user: "张三" },
  ];

  const getConfidenceColor = (score: number) => {
    if (score >= 80) return "text-emerald-600 dark:text-emerald-400 bg-emerald-50 dark:bg-emerald-500/10 border-emerald-200 dark:border-emerald-500/20";
    if (score >= 50) return "text-amber-600 dark:text-amber-400 bg-amber-50 dark:bg-amber-500/10 border-amber-200 dark:border-amber-500/20";
    return "text-rose-600 dark:text-rose-400 bg-rose-50 dark:bg-rose-500/10 border-rose-200 dark:border-rose-500/20";
  };

  return (
    <div className="space-y-6">
      <header className="flex items-center justify-between">
        <h1 className="text-2xl font-bold tracking-tight text-slate-900 dark:text-white">商机储备</h1>
        <button className="flex items-center gap-2 rounded-xl bg-violet-600 px-4 py-2 text-sm font-medium text-white shadow-sm hover:bg-violet-700 active:scale-95 transition-all">
          <Plus className="h-4 w-4" />
          <span className="hidden sm:inline">新增商机</span>
        </button>
      </header>

      {/* Search & Filter */}
      <div className="flex gap-3">
        <div className="relative flex-1 group">
          <Search className="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-slate-400 group-focus-within:text-violet-500 transition-colors" />
          <input
            type="text"
            placeholder="搜索项目名称、客户、编码..."
            className="w-full rounded-xl border border-slate-200 dark:border-slate-800 bg-white dark:bg-slate-900/50 py-2.5 pl-10 pr-4 text-sm text-slate-900 dark:text-white outline-none focus:border-violet-500 focus:ring-1 focus:ring-violet-500 transition-all placeholder:text-slate-400 dark:placeholder:text-slate-500"
          />
        </div>
        <button className="flex items-center justify-center rounded-xl border border-slate-200 dark:border-slate-800 bg-white dark:bg-slate-900/50 px-4 text-slate-600 dark:text-slate-400 hover:bg-slate-50 dark:hover:bg-slate-800 transition-colors">
          <Filter className="h-4 w-4" />
        </button>
      </div>

      {/* Quick Filters */}
      <div className="flex gap-2 overflow-x-auto pb-2 scrollbar-hide">
        {["全部", "初步沟通", "方案交流", "招投标", "商务谈判", "已成交"].map((stage) => (
          <button
            key={stage}
            onClick={() => setFilter(stage)}
            className={`whitespace-nowrap rounded-full px-4 py-1.5 text-sm font-medium transition-all duration-200 ${
              filter === stage || (filter === "all" && stage === "全部")
                ? "bg-slate-800 dark:bg-violet-600 text-white shadow-sm"
                : "bg-white dark:bg-slate-900/50 text-slate-600 dark:text-slate-400 border border-slate-200 dark:border-slate-800 hover:bg-slate-50 dark:hover:bg-slate-800"
            }`}
          >
            {stage}
          </button>
        ))}
      </div>

      {/* List */}
      <div className="space-y-4">
        {oppData.map((opp, i) => (
          <motion.div
            initial={{ opacity: 0, y: 10 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ delay: i * 0.05 }}
            key={opp.id}
            onClick={() => setSelectedItem(opp)}
            className="group cursor-pointer relative rounded-2xl border border-slate-100 dark:border-slate-800 bg-white dark:bg-slate-900/50 p-5 shadow-sm backdrop-blur-sm transition-all hover:shadow-md hover:border-violet-100 dark:hover:border-violet-900/50"
          >
            <div className="flex items-start justify-between">
              <div className="pr-8">
                <div className="flex items-center gap-2">
                  <span className="text-xs font-medium text-slate-400 dark:text-slate-500">{opp.id}</span>
                  {opp.pushedToOMS && (
                    <span className="rounded bg-violet-50 dark:bg-violet-500/10 px-1.5 py-0.5 text-[10px] font-medium text-violet-600 dark:text-violet-400">
                      已推OMS
                    </span>
                  )}
                </div>
                <h3 className="mt-1 text-lg font-semibold text-slate-900 dark:text-white line-clamp-1">{opp.name}</h3>
              </div>
              <div className={`flex flex-col items-center justify-center rounded-lg border p-2 ${getConfidenceColor(opp.confidence)}`}>
                <span className="text-xs font-semibold">{opp.confidence}%</span>
                <span className="text-[10px] opacity-80">把握度</span>
              </div>
            </div>

            <div className="mt-4 grid grid-cols-2 gap-y-3 text-sm">
              <div className="flex items-center gap-2 text-slate-600 dark:text-slate-300 col-span-2">
                <Building className="h-4 w-4 text-slate-400 dark:text-slate-500 shrink-0" />
                <span className="truncate">{opp.client}</span>
              </div>
              <div className="flex items-center gap-2 text-slate-600 dark:text-slate-300">
                <DollarSign className="h-4 w-4 text-slate-400 dark:text-slate-500 shrink-0" />
                <span className="font-medium text-slate-900 dark:text-white">¥{opp.amount}</span>
              </div>
              <div className="flex items-center gap-2 text-slate-600 dark:text-slate-300">
                <Calendar className="h-4 w-4 text-slate-400 dark:text-slate-500 shrink-0" />
                {opp.date}
              </div>
              <div className="flex items-center gap-2 text-slate-600 dark:text-slate-300">
                <Activity className="h-4 w-4 text-slate-400 dark:text-slate-500 shrink-0" />
                <span className="rounded-full bg-slate-100 dark:bg-slate-800 px-2 py-0.5 text-xs font-medium text-slate-700 dark:text-slate-300">
                  {opp.stage}
                </span>
              </div>
              <div className="flex items-center gap-2 text-slate-600 dark:text-slate-300">
                <span className="text-slate-400 dark:text-slate-500">类型:</span>
                {opp.type}
              </div>
            </div>

            <button className="absolute right-4 top-1/2 -translate-y-1/2 text-slate-300 dark:text-slate-600 opacity-0 transition-all group-hover:opacity-100 group-hover:text-violet-500 dark:group-hover:text-violet-400 md:block hidden">
              <ChevronRight className="h-6 w-6" />
            </button>
            <div className="mt-4 flex justify-end border-t border-slate-50 dark:border-slate-800/50 pt-3 md:hidden">
              <button className="flex items-center text-sm font-medium text-violet-600 dark:text-violet-400">
                查看详情 <ChevronRight className="h-4 w-4 ml-1" />
              </button>
            </div>
          </motion.div>
        ))}
      </div>

      {/* Detail Slide-over Panel */}
      <AnimatePresence>
        {selectedItem && (
          <>
            <motion.div
              initial={{ opacity: 0 }}
              animate={{ opacity: 1 }}
              exit={{ opacity: 0 }}
              onClick={() => setSelectedItem(null)}
              className="fixed inset-0 bg-slate-900/20 dark:bg-slate-900/60 backdrop-blur-sm z-40"
            />
            <motion.div
              initial={{ x: "100%" }}
              animate={{ x: 0 }}
              exit={{ x: "100%" }}
              transition={{ type: "spring", damping: 25, stiffness: 200 }}
              className="fixed inset-y-0 right-0 w-full max-w-md bg-white dark:bg-slate-900 shadow-2xl border-l border-slate-200 dark:border-slate-800 z-50 flex flex-col"
            >
              {/* Header */}
              <div className="flex items-center justify-between border-b border-slate-100 dark:border-slate-800 px-6 py-4">
                <h2 className="text-lg font-semibold text-slate-900 dark:text-white">商机详情</h2>
                <button
                  onClick={() => setSelectedItem(null)}
                  className="rounded-full p-2 text-slate-400 hover:bg-slate-100 dark:hover:bg-slate-800 transition-colors"
                >
                  <X className="h-5 w-5" />
                </button>
              </div>

              {/* Content */}
              <div className="flex-1 overflow-y-auto p-6 space-y-8">
                {/* Header Info */}
                <div>
                  <div className="flex items-center gap-2 mb-2">
                    <span className="text-xs font-medium text-slate-400 dark:text-slate-500">{selectedItem.id}</span>
                    {selectedItem.pushedToOMS && (
                      <span className="rounded bg-violet-50 dark:bg-violet-500/10 px-1.5 py-0.5 text-[10px] font-medium text-violet-600 dark:text-violet-400">
                        已推OMS
                      </span>
                    )}
                  </div>
                  <h3 className="text-xl font-bold text-slate-900 dark:text-white leading-tight">{selectedItem.name}</h3>
                  <div className="mt-3 flex gap-2">
                    <span className="rounded-full bg-slate-100 dark:bg-slate-800 px-2.5 py-1 text-xs font-medium text-slate-700 dark:text-slate-300">
                      {selectedItem.stage}
                    </span>
                    <span className={`rounded-full px-2.5 py-1 text-xs font-medium ${getConfidenceColor(selectedItem.confidence)}`}>
                      把握度 {selectedItem.confidence}%
                    </span>
                  </div>
                </div>

                {/* Basic Info Grid */}
                <div className="space-y-3">
                  <h4 className="text-sm font-semibold text-slate-900 dark:text-white flex items-center gap-2">
                    <FileText className="h-4 w-4 text-violet-500" />
                    基本信息
                  </h4>
                  <div className="rounded-xl border border-slate-100 dark:border-slate-800 bg-slate-50/50 dark:bg-slate-800/20 p-4 grid grid-cols-2 gap-4 text-sm">
                    <div className="col-span-2"><p className="text-slate-500 dark:text-slate-400 mb-1 flex items-center gap-1"><Building className="h-3 w-3"/> 客户名称</p><p className="font-medium text-slate-900 dark:text-white">{selectedItem.client}</p></div>
                    <div className="col-span-2 sm:col-span-1"><p className="text-slate-500 dark:text-slate-400 mb-1 flex items-center gap-1"><DollarSign className="h-3 w-3"/> 商机金额</p><p className="font-medium text-rose-600 dark:text-rose-400">¥{selectedItem.amount}</p></div>
                    <div className="col-span-2 sm:col-span-1"><p className="text-slate-500 dark:text-slate-400 mb-1 flex items-center gap-1"><Calendar className="h-3 w-3"/> 预计结单</p><p className="font-medium text-slate-900 dark:text-white">{selectedItem.date}</p></div>
                    <div className="col-span-2 sm:col-span-1"><p className="text-slate-500 dark:text-slate-400 mb-1 flex items-center gap-1"><User className="h-3 w-3"/> 负责人</p><p className="font-medium text-slate-900 dark:text-white">{selectedItem.owner}</p></div>
                    <div className="col-span-2 sm:col-span-1"><p className="text-slate-500 dark:text-slate-400 mb-1 flex items-center gap-1"><Tag className="h-3 w-3"/> 商机类型</p><p className="font-medium text-slate-900 dark:text-white">{selectedItem.type}</p></div>
                    <div className="col-span-2 sm:col-span-1"><p className="text-slate-500 dark:text-slate-400 mb-1 flex items-center gap-1"><Activity className="h-3 w-3"/> 产品类别</p><p className="font-medium text-slate-900 dark:text-white">{selectedItem.product}</p></div>
                    <div className="col-span-2 sm:col-span-1"><p className="text-slate-500 dark:text-slate-400 mb-1 flex items-center gap-1"><LinkIcon className="h-3 w-3"/> 商机来源</p><p className="font-medium text-slate-900 dark:text-white">{selectedItem.source}</p></div>
                    <div className="col-span-2"><p className="text-slate-500 dark:text-slate-400 mb-1">备注说明</p><p className="font-medium text-slate-900 dark:text-white leading-relaxed">{selectedItem.notes}</p></div>
                  </div>
                </div>

                {/* Timeline */}
                <div className="space-y-4">
                  <div className="flex items-center justify-between">
                    <h4 className="text-sm font-semibold text-slate-900 dark:text-white flex items-center gap-2">
                      <Clock className="h-4 w-4 text-violet-500" />
                      跟进记录
                    </h4>
                    <button className="text-xs font-medium text-violet-600 dark:text-violet-400 hover:text-violet-700">添加记录</button>
                  </div>
                  <div className="relative pl-4 border-l-2 border-slate-100 dark:border-slate-800 space-y-6">
                    {followUpRecords.map((record) => (
                      <div key={record.id} className="relative">
                        <div className="absolute -left-[21px] mt-1.5 h-2.5 w-2.5 rounded-full bg-violet-500 ring-4 ring-white dark:ring-slate-900" />
                        <div className="rounded-xl border border-slate-100 dark:border-slate-800 bg-slate-50/50 dark:bg-slate-800/20 p-4">
                          <div className="flex items-center justify-between mb-2">
                            <span className="text-xs font-medium text-violet-600 dark:text-violet-400 bg-violet-50 dark:bg-violet-500/10 px-2 py-0.5 rounded">{record.type}</span>
                            <span className="text-xs text-slate-400">{record.date}</span>
                          </div>
                          <p className="text-sm text-slate-700 dark:text-slate-300 leading-relaxed">{record.content}</p>
                          <p className="text-xs text-slate-400 mt-2">跟进人: {record.user}</p>
                        </div>
                      </div>
                    ))}
                  </div>
                </div>
              </div>

              {/* Footer */}
              <div className="border-t border-slate-100 dark:border-slate-800 p-4 bg-slate-50 dark:bg-slate-900/50">
                <div className="flex gap-3">
                  <button className="flex-1 rounded-xl border border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 px-4 py-2.5 text-sm font-medium text-slate-700 dark:text-slate-300 hover:bg-slate-50 dark:hover:bg-slate-700 transition-colors">
                    编辑商机
                  </button>
                  <button className="flex-1 rounded-xl bg-violet-600 px-4 py-2.5 text-sm font-medium text-white hover:bg-violet-700 transition-colors shadow-sm">
                    写跟进
                  </button>
                </div>
              </div>
            </motion.div>
          </>
        )}
      </AnimatePresence>
    </div>
  );
}