'use client';

import React, { useEffect, useState } from 'react';
import { FaBriefcase, FaClock, FaCheckCircle, FaSearch } from 'react-icons/fa';
import { Card } from './shared/Card';
import { StatsCard } from './shared/StatsCard';

interface Case {
  id: string;
  userId: string;
  status: 'new' | 'assigned' | 'in_progress' | 'resolved';
  type: string;
  description: string;
  createdAt: Date;
  updatedAt: Date;
  transcripts: string[];
}

interface Stats {
  totalCases: number;
  activeCases: number;
  resolvedCases: number;
}

export function AdvocateDashboard() {
  const [cases, setCases] = useState<Case[]>([]);
  const [stats, setStats] = useState<Stats>({
    totalCases: 0,
    activeCases: 0,
    resolvedCases: 0,
  });
  const [loading, setLoading] = useState(true);
  const [searchTerm, setSearchTerm] = useState('');

  useEffect(() => {
    fetchDashboardData();
  }, []);

  const fetchDashboardData = async () => {
    try {
      const response = await fetch('/api/advocate/dashboard', {
        headers: {
          Authorization: `Bearer ${localStorage.getItem('token')}`,
        },
      });
      const data = await response.json();

      if (data.success) {
        setCases(data.data.cases);
        setStats(data.data.stats);
      }
    } catch (error) {
      console.error('Error fetching dashboard data:', error);
    } finally {
      setLoading(false);
    }
  };

  const updateCaseStatus = async (caseId: string, status: 'in_progress' | 'resolved') => {
    try {
      const response = await fetch(`/api/advocate/cases/${caseId}/status`, {
        method: 'PATCH',
        headers: {
          'Content-Type': 'application/json',
          Authorization: `Bearer ${localStorage.getItem('token')}`,
        },
        body: JSON.stringify({ status }),
      });

      if (response.ok) {
        fetchDashboardData();
      }
    } catch (error) {
      console.error('Error updating case status:', error);
    }
  };

  const filteredCases = cases.filter(
    (case_) =>
      case_.type.toLowerCase().includes(searchTerm.toLowerCase()) ||
      case_.description.toLowerCase().includes(searchTerm.toLowerCase())
  );

  if (loading) {
    return (
      <div className="flex h-screen items-center justify-center">
        <div className="h-32 w-32 animate-spin rounded-full border-b-2 border-t-2 border-blue-500"></div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-gray-50 p-6">
      <div className="mx-auto max-w-7xl">
        <div className="mb-8 flex items-center justify-between">
          <h1 className="text-3xl font-bold text-gray-900">Advocate Dashboard</h1>
          <div className="relative">
            <input
              type="text"
              placeholder="Search cases..."
              value={searchTerm}
              onChange={(e) => setSearchTerm(e.target.value)}
              className="w-64 rounded-lg border border-gray-300 bg-white px-4 py-2 pl-10 focus:border-blue-500 focus:outline-none focus:ring-2 focus:ring-blue-200"
            />
            <FaSearch className="absolute left-3 top-3 text-gray-400" />
          </div>
        </div>

        <div className="mb-8 grid grid-cols-1 gap-6 md:grid-cols-3">
          <StatsCard
            title="Total Cases"
            value={stats.totalCases}
            icon={FaBriefcase}
            color="blue"
          />
          <StatsCard
            title="Active Cases"
            value={stats.activeCases}
            icon={FaClock}
            color="yellow"
            trend={{ value: 12, isPositive: true }}
          />
          <StatsCard
            title="Resolved Cases"
            value={stats.resolvedCases}
            icon={FaCheckCircle}
            color="green"
            trend={{ value: 8, isPositive: true }}
          />
        </div>

        <Card title="Current Cases">
          <div className="divide-y divide-gray-100">
            {filteredCases.map((case_) => (
              <div key={case_.id} className="py-4">
                <div className="mb-2 flex items-center justify-between">
                  <div>
                    <h3 className="text-lg font-semibold text-gray-900">
                      {case_.type}
                    </h3>
                    <p className="text-sm text-gray-500">
                      Created: {new Date(case_.createdAt).toLocaleDateString()}
                    </p>
                  </div>
                  <div className="flex gap-2">
                    {case_.status === 'assigned' && (
                      <button
                        onClick={() => updateCaseStatus(case_.id, 'in_progress')}
                        className="rounded bg-blue-500 px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-blue-200"
                      >
                        Start Case
                      </button>
                    )}
                    {case_.status === 'in_progress' && (
                      <button
                        onClick={() => updateCaseStatus(case_.id, 'resolved')}
                        className="rounded bg-green-500 px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-green-600 focus:outline-none focus:ring-2 focus:ring-green-200"
                      >
                        Mark Resolved
                      </button>
                    )}
                  </div>
                </div>
                <p className="mb-4 text-gray-700">{case_.description}</p>
                {case_.transcripts.length > 0 && (
                  <div className="mt-4">
                    <h4 className="mb-2 font-semibold text-gray-900">
                      Transcripts
                    </h4>
                    <div className="space-y-2">
                      {case_.transcripts.map((transcript, index) => (
                        <div
                          key={index}
                          className="rounded-lg bg-gray-50 p-3 text-sm text-gray-700"
                        >
                          {transcript}
                        </div>
                      ))}
                    </div>
                  </div>
                )}
              </div>
            ))}
          </div>
        </Card>
      </div>
    </div>
  );
}