import { useState, useEffect } from "react";
import { useNavigate } from "react-router";
import { motion } from "motion/react";
import {
  ChevronLeft,
  UserCheck,
  Star,
  Clock,
  MessageCircle,
  Video,
  FileText,
  Award,
  ThumbsUp,
  ChevronRight,
  Loader2,
} from "lucide-react";
import { Button } from "../components/ui/button";
import { Card } from "../components/ui/card";
import { Badge } from "../components/ui/badge";
import { getExperts, type Doctor as DoctorDTO } from "../services/api";

interface Doctor {
  id: string;
  name: string;
  title: string;
  hospital: string;
  specialty: string;
  experience: string;
  rating: number;
  reviewCount: number;
  consultCount: number;
  responseTime: string;
  price: number;
  avatar: string;
  tags: string[];
}

export function ExpertConsultationPage() {
  const navigate = useNavigate();
  const [selectedService, setSelectedService] = useState("text");
  const [doctors, setDoctors] = useState<Doctor[]>([]);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    getExperts()
      .then((data) => {
        setDoctors(
          data.doctors.map((d) => ({
            id: d.id,
            name: d.name,
            title: d.title,
            hospital: d.hospital,
            specialty: d.specialty,
            experience: d.experience,
            rating: d.rating,
            reviewCount: d.review_count,
            consultCount: d.consult_count,
            responseTime: d.response_time,
            price: d.price?.text || 50,
            avatar: "",
            tags: d.tags,
          }))
        );
      })
      .catch(() => {/* keep empty */})
      .finally(() => setLoading(false));
  }, []);

  const services = [
    {
      id: "text",
      name: "图文咨询",
      icon: MessageCircle,
      price: 50,
      time: "24小时内回复",
      description: "上传报告，医生详细解读",
    },
    {
      id: "video",
      name: "视频问诊",
      icon: Video,
      price: 200,
      time: "预约时间",
      description: "面对面沟通，更加详细",
    },
    {
      id: "urgent",
      name: "加急咨询",
      icon: Clock,
      price: 100,
      time: "2小时内回复",
      description: "紧急情况，优先处理",
    },
  ];

  if (loading) {
    return (
      <div className="min-h-dvh bg-morandi-50 flex items-center justify-center">
        <Loader2 className="w-8 h-8 text-morandi-400 animate-spin" />
      </div>
    );
  }

  return (
    <div className="min-h-dvh bg-morandi-50">
      {/* 顶部导航 */}
      <div className="bg-white border-b border-gray-100 sticky top-0 z-10">
        <div className="mx-auto px-4 py-4 flex items-center justify-between">
          <div className="flex items-center gap-3">
            <button
              onClick={() => navigate(-1)}
              className="w-10 h-10 rounded-full hover:bg-gray-100 flex items-center justify-center"
            >
              <ChevronLeft className="w-6 h-6 text-gray-600" />
            </button>
            <div className="flex items-center gap-2">
              <div className="w-10 h-10 bg-morandi-400 rounded-full flex items-center justify-center">
                <UserCheck className="w-5 h-5 text-white" />
              </div>
              <div>
                <h1 className="font-semibold text-gray-800">专家复核</h1>
                <p className="text-xs text-gray-500">专业医生在线解答</p>
              </div>
            </div>
          </div>
        </div>
      </div>

      <div className="mx-auto p-4 space-y-6">
        {/* 服务介绍 */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
        >
          <Card className="bg-gradient-to-br from-morandi-400 to-morandi-500 border-0 text-white p-6 rounded-3xl shadow-sm">
            <h2 className="text-xl font-semibold mb-3">👨‍⚕️ 为什么需要专家复核</h2>
            <div className="space-y-2 text-sm text-white/90">
              <p>✓ AI解读仅供参考，复杂情况需专业医生判断</p>
              <p>✓ 三甲医院主任医师，20年+临床经验</p>
              <p>✓ 一对一解答，针对您的具体情况给出建议</p>
              <p>✓ 支持图文、视频多种咨询方式</p>
            </div>
          </Card>
        </motion.div>

        {/* 咨询方式选择 */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.1 }}
        >
          <h2 className="text-lg font-semibold text-gray-800 mb-4">
            选择咨询方式
          </h2>
          <div className="grid grid-cols-3 gap-3">
            {services.map((service) => (
              <button
                key={service.id}
                onClick={() => setSelectedService(service.id as any)}
                className={`p-4 rounded-2xl transition-all ${
                  selectedService === service.id
                    ? "bg-morandi-400 text-white shadow-sm scale-105"
                    : "bg-white text-gray-600 hover:bg-gray-50"
                }`}
              >
                <service.icon
                  className={`w-8 h-8 mx-auto mb-2 ${
                    selectedService === service.id
                      ? "text-white"
                      : "text-morandi-400"
                  }`}
                />
                <div className="font-semibold text-sm mb-1">
                  {service.name}
                </div>
                <div
                  className={`text-xs mb-2 ${
                    selectedService === service.id
                      ? "text-white/80"
                      : "text-gray-500"
                  }`}
                >
                  {service.time}
                </div>
                <div className="font-semibold">¥{service.price}</div>
              </button>
            ))}
          </div>
        </motion.div>

        {/* 推荐医生 */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.2 }}
        >
          <h2 className="text-lg font-semibold text-gray-800 mb-4">
            🏥 推荐专家
          </h2>
          <div className="space-y-4">
            {doctors.map((doctor, index) => (
              <motion.div
                key={doctor.id}
                initial={{ opacity: 0, x: -20 }}
                animate={{ opacity: 1, x: 0 }}
                transition={{ delay: 0.3 + index * 0.05 }}
              >
                <Card className="bg-white rounded-2xl p-5 shadow-sm hover:shadow-md transition-all border-0">
                  <div className="flex items-start gap-4 mb-4">
                    {/* 医生头像 */}
                    <div className="w-16 h-16 bg-morandi-400 rounded-full flex items-center justify-center text-white text-2xl font-semibold flex-shrink-0">
                      {doctor.name.charAt(0)}
                    </div>

                    <div className="flex-1 min-w-0">
                      <div className="flex items-center gap-2 mb-2">
                        <h3 className="font-semibold text-gray-800 text-lg">
                          {doctor.name}
                        </h3>
                        <Badge className="bg-morandi-50 text-morandi-500 hover:bg-morandi-50">
                          {doctor.title}
                        </Badge>
                        {doctor.rating >= 4.9 && (
                          <Award className="w-4 h-4 text-yellow-500" />
                        )}
                      </div>

                      <div className="space-y-1 text-sm text-gray-600 mb-3">
                        <p>{doctor.hospital} · {doctor.specialty}</p>
                        <p>{doctor.experience}</p>
                      </div>

                      <div className="flex items-center gap-4 text-sm text-gray-500 mb-3">
                        <div className="flex items-center gap-1">
                          <Star className="w-4 h-4 text-yellow-500 fill-yellow-500" />
                          <span className="font-semibold text-gray-800">
                            {doctor.rating}
                          </span>
                          <span>({doctor.reviewCount}评价)</span>
                        </div>
                        <div className="flex items-center gap-1">
                          <ThumbsUp className="w-4 h-4" />
                          <span>{doctor.consultCount}次咨询</span>
                        </div>
                      </div>

                      <div className="flex flex-wrap gap-2 mb-3">
                        {doctor.tags.map((tag, i) => (
                          <span
                            key={i}
                            className="px-3 py-1 bg-morandi-50 text-morandi-500 text-xs rounded-full"
                          >
                            {tag}
                          </span>
                        ))}
                      </div>

                      <div className="flex items-center gap-2 text-sm">
                        <Clock className="w-4 h-4 text-gray-400" />
                        <span className="text-gray-600">
                          响应时间：{doctor.responseTime}
                        </span>
                      </div>
                    </div>
                  </div>

                  <div className="flex items-center justify-between pt-4 border-t border-gray-100">
                    <div>
                      <span className="text-gray-500 text-sm mr-2">
                        咨询费用
                      </span>
                      <span className="text-2xl font-semibold text-morandi-500">
                        ¥{doctor.price}
                      </span>
                      <span className="text-gray-500 text-sm">/次</span>
                    </div>
                    <Button className="bg-morandi-400 hover:bg-morandi-500">
                      立即咨询
                      <ChevronRight className="w-4 h-4 ml-1" />
                    </Button>
                  </div>
                </Card>
              </motion.div>
            ))}
          </div>
        </motion.div>

        {/* 咨询流程 */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.5 }}
        >
          <Card className="bg-white rounded-2xl p-5 shadow-sm border-0">
            <h3 className="font-semibold text-gray-800 mb-4">📋 咨询流程</h3>
            <div className="space-y-3">
              {[
                { step: 1, text: "选择医生和咨询方式" },
                { step: 2, text: "上传检查报告和问题描述" },
                { step: 3, text: "支付咨询费用" },
                { step: 4, text: "医生接单并给出专业建议" },
                { step: 5, text: "可追问3次，获得满意答复" },
              ].map((item) => (
                <div key={item.step} className="flex items-start gap-3">
                  <div className="flex-shrink-0 w-6 h-6 bg-morandi-100 text-morandi-500 rounded-full flex items-center justify-center text-sm font-semibold">
                    {item.step}
                  </div>
                  <p className="text-gray-700 pt-0.5">{item.text}</p>
                </div>
              ))}
            </div>
          </Card>
        </motion.div>

        {/* 温馨提示 */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.6 }}
        >
          <Card className="bg-gradient-to-r from-morandi-rose-100 to-red-50 border-morandi-rose-300 rounded-2xl p-4">
            <h3 className="font-semibold text-gray-800 mb-2">⚠️ 重要提示</h3>
            <ul className="space-y-1 text-sm text-gray-600">
              <li>• 在线咨询仅供参考，不能替代线下就诊</li>
              <li>• 如有紧急情况，请立即前往医院就诊</li>
              <li>• 咨询记录会保存，可随时查看</li>
              <li>• 医生回复后24小时内可免费追问</li>
            </ul>
          </Card>
        </motion.div>
      </div>
    </div>
  );
}