import { useState } from "react";
import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/components/ui/card";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
import {
  FileText, Download, Plus, BarChart3, Users, ShoppingCart,
  Calendar, FileDown, Eye, TrendingUp, DollarSign, ArrowUpRight
} from "lucide-react";
import Sidebar from "@/components/Sidebar";
import Header from "@/components/Header";

const recentReports = [
  { name: "Monthly Sales Report", type: "Sales", typeColor: "bg-emerald-100 text-emerald-700", date: "Apr 10, 2026", size: "2.4 MB", icon: DollarSign },
  { name: "User Acquisition Q1", type: "Users", typeColor: "bg-sky-100 text-sky-700", date: "Apr 8, 2026", size: "1.8 MB", icon: Users },
  { name: "Traffic Analysis March", type: "Traffic", typeColor: "bg-orange-100 text-orange-700", date: "Apr 5, 2026", size: "3.1 MB", icon: BarChart3 },
  { name: "Weekly Sales Summary", type: "Sales", typeColor: "bg-emerald-100 text-emerald-700", date: "Apr 3, 2026", size: "890 KB", icon: DollarSign },
  { name: "User Retention Report", type: "Users", typeColor: "bg-sky-100 text-sky-700", date: "Mar 28, 2026", size: "1.5 MB", icon: Users },
  { name: "Quarterly Traffic Overview", type: "Traffic", typeColor: "bg-orange-100 text-orange-700", date: "Mar 25, 2026", size: "4.2 MB", icon: BarChart3 },
];

const previewStats = [
  { label: "Total Revenue", value: "$124,582", change: "+14.2%", icon: DollarSign },
  { label: "New Users", value: "3,847", change: "+8.7%", icon: Users },
  { label: "Orders Placed", value: "2,156", change: "+23.5%", icon: ShoppingCart },
  { label: "Conversion Rate", value: "4.8%", change: "+1.2%", icon: TrendingUp },
];

export default function ReportsPage() {
  const [reportType, setReportType] = useState("sales");

  return (
    <div className="flex min-h-screen bg-slate-50">
      <Sidebar activePath="/reports" />
      <div className="flex-1 lg:ml-64">
        <Header />
        <main className="p-6 space-y-8">
          <div className="flex flex-col sm:flex-row items-start sm:items-center justify-between gap-4">
            <div>
              <h1 className="text-2xl font-bold text-slate-900 animate-fade-up">Reports</h1>
              <p className="text-sm text-slate-500 mt-1">Generate and manage your analytics reports</p>
            </div>
            <div className="flex items-center gap-3">
              <Select value={reportType} onValueChange={setReportType}>
                <SelectTrigger className="w-[160px] bg-white">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="sales">Sales Report</SelectItem>
                  <SelectItem value="users">Users Report</SelectItem>
                  <SelectItem value="traffic">Traffic Report</SelectItem>
                </SelectContent>
              </Select>
              <Button className="bg-sky-600 hover:bg-sky-700 text-white active:scale-[0.98] transition-all">
                <Plus className="mr-2 h-4 w-4" /> Generate Report
              </Button>
            </div>
          </div>

          {/* ── Report Preview ── */}
          <Card className="border-0 shadow-sm">
            <CardHeader className="flex flex-row items-center justify-between">
              <div>
                <CardTitle className="text-lg font-semibold text-slate-900">Report Preview</CardTitle>
                <CardDescription>Summary of the latest generated report</CardDescription>
              </div>
              <Badge className="bg-emerald-100 text-emerald-700 border-0">
                <Calendar className="mr-1.5 h-3 w-3" /> Apr 2026
              </Badge>
            </CardHeader>
            <CardContent>
              <div className="grid grid-cols-2 lg:grid-cols-4 gap-4 stagger">
                {previewStats.map((stat) => (
                  <div key={stat.label} className="p-4 rounded-xl bg-slate-50 border border-slate-100 hover:shadow-lg hover:-translate-y-0.5 transition-all duration-300">
                    <div className="flex items-center justify-between mb-3">
                      <div className="h-10 w-10 rounded-lg bg-sky-100 flex items-center justify-center">
                        <stat.icon className="h-5 w-5 text-sky-600" />
                      </div>
                      <span className="flex items-center text-xs font-medium text-emerald-600">
                        <ArrowUpRight className="h-3 w-3 mr-0.5" />{stat.change}
                      </span>
                    </div>
                    <p className="text-xl font-bold text-slate-900">{stat.value}</p>
                    <p className="text-xs text-slate-500 mt-1">{stat.label}</p>
                  </div>
                ))}
              </div>

              {/* Chart Placeholder */}
              <div className="mt-6 h-48 rounded-xl bg-gradient-to-br from-sky-50/80 via-slate-50 to-violet-50/60 border border-slate-200/60 flex items-center justify-center animate-scale-in">
                <div className="text-center">
                  <BarChart3 className="h-10 w-10 text-slate-300 mx-auto mb-2" />
                  <p className="text-sm text-slate-400">Report visualization will appear here</p>
                </div>
              </div>
            </CardContent>
          </Card>

          {/* ── Recent Reports Table ── */}
          <Card className="border-0 shadow-sm">
            <CardHeader>
              <CardTitle className="text-lg font-semibold text-slate-900">Recent Reports</CardTitle>
              <CardDescription>Previously generated reports and downloads</CardDescription>
            </CardHeader>
            <CardContent>
              <Table>
                <TableHeader>
                  <TableRow className="border-slate-100">
                    <TableHead className="text-slate-500 font-medium">Report Name</TableHead>
                    <TableHead className="text-slate-500 font-medium">Type</TableHead>
                    <TableHead className="text-slate-500 font-medium">Generated</TableHead>
                    <TableHead className="text-slate-500 font-medium">Size</TableHead>
                    <TableHead className="text-slate-500 font-medium text-right">Actions</TableHead>
                  </TableRow>
                </TableHeader>
                <TableBody>
                  {recentReports.map((report) => (
                    <TableRow key={report.name} className="border-slate-100 hover:bg-muted/50 transition-colors">
                      <TableCell>
                        <div className="flex items-center gap-3">
                          <div className="h-9 w-9 rounded-lg bg-slate-100 flex items-center justify-center">
                            <FileText className="h-4 w-4 text-slate-500" />
                          </div>
                          <span className="font-medium text-slate-900">{report.name}</span>
                        </div>
                      </TableCell>
                      <TableCell>
                        <Badge variant="secondary" className={`\${report.typeColor} border-0 font-medium`}>
                          {report.type}
                        </Badge>
                      </TableCell>
                      <TableCell className="text-slate-500">{report.date}</TableCell>
                      <TableCell className="text-slate-500">{report.size}</TableCell>
                      <TableCell className="text-right">
                        <div className="flex items-center justify-end gap-1">
                          <Button variant="ghost" size="sm" className="h-8 w-8 p-0 text-slate-400 hover:text-sky-600">
                            <Eye className="h-4 w-4" />
                          </Button>
                          <Button variant="ghost" size="sm" className="h-8 w-8 p-0 text-slate-400 hover:text-sky-600">
                            <Download className="h-4 w-4" />
                          </Button>
                        </div>
                      </TableCell>
                    </TableRow>
                  ))}
                </TableBody>
              </Table>
            </CardContent>
          </Card>
        </main>
      </div>
    </div>
  );
}