import React, { useState } from "react";
import { motion, AnimatePresence } from "framer-motion";
import {
  Code2,
  Copy,
  Check,
  Braces,
  FileCode2,
  FileText,
  Sparkles,
  ChevronDown,
} from "lucide-react";
import { Button } from "@/components/ui/button";
import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { cn } from "@/lib/utils";

// Mock extracted data
const mockData = {
  document: {
    type: "Invoice",
    confidence: 0.98,
  },
  vendor: {
    name: "Acme Corporation",
    address: "123 Business Ave, Suite 400",
    city: "San Francisco",
    state: "CA",
    zip: "94102",
    phone: "+1 (555) 123-4567",
  },
  invoice: {
    number: "INV-2024-0847",
    date: "2024-01-15",
    due_date: "2024-02-14",
    po_number: "PO-9823",
  },
  items: [
    { description: "Professional Services", quantity: 40, unit_price: 150.0, total: 6000.0 },
    { description: "Software License", quantity: 5, unit_price: 299.99, total: 1499.95 },
    { description: "Support Package", quantity: 1, unit_price: 500.0, total: 500.0 },
  ],
  totals: {
    subtotal: 7999.95,
    tax_rate: 0.0875,
    tax_amount: 699.99,
    total: 8699.94,
  },
};

const mockXML = `<?xml version="1.0" encoding="UTF-8"?>
<extraction>
  <document type="Invoice" confidence="0.98"/>
  <vendor>
    <name>Acme Corporation</name>
    <address>123 Business Ave, Suite 400</address>
    <city>San Francisco</city>
    <state>CA</state>
    <zip>94102</zip>
  </vendor>
  <invoice>
    <number>INV-2024-0847</number>
    <date>2024-01-15</date>
    <due_date>2024-02-14</due_date>
  </invoice>
  <items>
    <item>
      <description>Professional Services</description>
      <quantity>40</quantity>
      <total>6000.00</total>
    </item>
  </items>
  <totals>
    <subtotal>7999.95</subtotal>
    <tax>699.99</tax>
    <total>8699.94</total>
  </totals>
</extraction>`;

const mockText = `INVOICE

ACME CORPORATION
123 Business Ave, Suite 400
San Francisco, CA 94102
Phone: +1 (555) 123-4567

Invoice Number: INV-2024-0847
Invoice Date: January 15, 2024
Due Date: February 14, 2024
PO Number: PO-9823

BILL TO:
Customer Name
456 Client Street
New York, NY 10001

ITEMS:
─────────────────────────────────────────────────────────
Description                  Qty    Unit Price    Total
─────────────────────────────────────────────────────────
Professional Services         40      $150.00    $6,000.00
Software License               5      $299.99    $1,499.95
Support Package                1      $500.00      $500.00
─────────────────────────────────────────────────────────

                              Subtotal:    $7,999.95
                              Tax (8.75%):   $699.99
                              ─────────────────────────
                              TOTAL:       $8,699.94

Payment Terms: Net 30
Thank you for your business!`;

export default function ExtractionOutput({ hasFile, isProcessing, isComplete }) {
  const [activeTab, setActiveTab] = useState("text");
  const [copied, setCopied] = useState(false);
  const [expandedSections, setExpandedSections] = useState(["vendor", "invoice", "items", "totals"]);

  const handleCopy = () => {
    const content =
      activeTab === "json"
        ? JSON.stringify(mockData, null, 2)
        : activeTab === "xml"
        ? mockXML
        : mockText;
    navigator.clipboard.writeText(content);
    setCopied(true);
    setTimeout(() => setCopied(false), 2000);
  };

  const toggleSection = (section) => {
    setExpandedSections((prev) =>
      prev.includes(section) ? prev.filter((s) => s !== section) : [...prev, section]
    );
  };

  const renderValue = (value) => {
    if (typeof value === "number") {
      return <span className="text-amber-600">{value}</span>;
    }
    if (typeof value === "string") {
      return <span className="text-emerald-600">"{value}"</span>;
    }
    return String(value);
  };

  const renderSection = (key, value, level = 0) => {
    const isExpanded = expandedSections.includes(key);
    const isObject = typeof value === "object" && value !== null;
    const isArray = Array.isArray(value);

    if (!isObject) {
      return (
        <div
          key={key}
          className="flex items-start gap-2 py-1"
          style={{ paddingLeft: level * 16 }}
        >
          <span className="text-violet-500">"{key}"</span>
          <span className="text-slate-400">:</span>
          {renderValue(value)}
        </div>
      );
    }

    return (
      <div key={key}>
        <button
          onClick={() => toggleSection(key)}
          className="flex items-center gap-2 py-1 hover:bg-slate-50 w-full text-left rounded"
          style={{ paddingLeft: level * 16 }}
        >
          <ChevronDown
            className={cn(
              "h-3 w-3 text-slate-400 transition-transform",
              !isExpanded && "-rotate-90"
            )}
          />
          <span className="text-violet-500">"{key}"</span>
          <span className="text-slate-400">:</span>
          <span className="text-slate-400">{isArray ? "[" : "{"}</span>
          {!isExpanded && (
            <span className="text-slate-300 text-xs">
              {isArray ? `${value.length} items` : `${Object.keys(value).length} fields`}
            </span>
          )}
        </button>
        <AnimatePresence>
          {isExpanded && (
            <motion.div
              initial={{ height: 0, opacity: 0 }}
              animate={{ height: "auto", opacity: 1 }}
              exit={{ height: 0, opacity: 0 }}
              transition={{ duration: 0.2 }}
              className="overflow-hidden"
            >
              {isArray ? (
                value.map((item, idx) => (
                  <div key={idx} className="border-l border-slate-100 ml-4">
                    {Object.entries(item).map(([k, v]) => renderSection(k, v, level + 2))}
                    {idx < value.length - 1 && <div className="h-2" />}
                  </div>
                ))
              ) : (
                Object.entries(value).map(([k, v]) => renderSection(k, v, level + 1))
              )}
              <div style={{ paddingLeft: level * 16 }} className="text-slate-400">
                {isArray ? "]" : "}"}
              </div>
            </motion.div>
          )}
        </AnimatePresence>
      </div>
    );
  };

  return (
    <div className="h-full flex flex-col bg-white rounded-2xl border border-slate-200 overflow-hidden">
      {/* Header */}
      <div className="flex items-center justify-between px-5 py-4 border-b border-slate-100">
        <div className="flex items-center gap-3">
          <div className="h-8 w-8 rounded-lg bg-emerald-50 flex items-center justify-center">
            <Code2 className="h-4 w-4 text-emerald-600" />
          </div>
          <div>
            <h3 className="font-semibold text-slate-800 text-sm">Extracted Data</h3>
            <p className="text-xs text-slate-400">
              {isComplete ? "25 fields extracted" : "Waiting for extraction"}
            </p>
          </div>
        </div>

        {isComplete && (
          <div className="flex items-center gap-2">
            <Tabs value={activeTab} onValueChange={setActiveTab}>
              <TabsList className="h-8 bg-slate-100 p-0.5">
                <TabsTrigger value="text" className="h-7 text-xs gap-1.5">
                  <FileText className="h-3 w-3" />
                  Text
                </TabsTrigger>
                <TabsTrigger value="json" className="h-7 text-xs gap-1.5">
                  <Braces className="h-3 w-3" />
                  JSON
                </TabsTrigger>
                <TabsTrigger value="xml" className="h-7 text-xs gap-1.5">
                  <FileCode2 className="h-3 w-3" />
                  XML
                </TabsTrigger>
              </TabsList>
            </Tabs>
            <Button
              variant="ghost"
              size="sm"
              onClick={handleCopy}
              className="h-8 text-xs gap-1.5"
            >
              {copied ? (
                <>
                  <Check className="h-3 w-3 text-emerald-500" />
                  Copied
                </>
              ) : (
                <>
                  <Copy className="h-3 w-3" />
                  Copy
                </>
              )}
            </Button>
          </div>
        )}
      </div>

      {/* Output Area */}
      <div className="flex-1 overflow-auto">
        {!hasFile ? (
          <div className="h-full flex items-center justify-center p-6">
            <div className="text-center">
              <div className="h-20 w-20 mx-auto rounded-2xl bg-slate-100 flex items-center justify-center mb-4">
                <Code2 className="h-10 w-10 text-slate-300" />
              </div>
              <p className="text-slate-400 text-sm">Extracted data will appear here</p>
            </div>
          </div>
        ) : isProcessing ? (
          <div className="h-full flex items-center justify-center p-6">
            <div className="text-center">
              <motion.div
                animate={{ rotate: 360 }}
                transition={{ duration: 2, repeat: Infinity, ease: "linear" }}
                className="h-16 w-16 mx-auto rounded-2xl bg-gradient-to-br from-indigo-100 to-violet-100 flex items-center justify-center mb-4"
              >
                <Sparkles className="h-8 w-8 text-indigo-500" />
              </motion.div>
              <p className="text-slate-700 font-medium mb-1">AI is extracting data...</p>
              <p className="text-slate-400 text-sm">Analyzing document structure</p>

              <div className="mt-6 flex items-center justify-center gap-1">
                {[0, 1, 2].map((i) => (
                  <motion.div
                    key={i}
                    animate={{ scale: [1, 1.2, 1] }}
                    transition={{
                      duration: 0.6,
                      repeat: Infinity,
                      delay: i * 0.2,
                    }}
                    className="h-2 w-2 rounded-full bg-indigo-400"
                  />
                ))}
              </div>
            </div>
          </div>
        ) : (
          <div className="p-4 font-mono text-sm">
            {activeTab === "text" ? (
              <pre className="text-sm text-slate-700 whitespace-pre-wrap leading-relaxed">
                {mockText}
              </pre>
            ) : activeTab === "json" ? (
              <div className="space-y-1">
                <span className="text-slate-400">{"{"}</span>
                {Object.entries(mockData).map(([key, value]) =>
                  renderSection(key, value, 1)
                )}
                <span className="text-slate-400">{"}"}</span>
              </div>
            ) : (
              <pre className="text-sm text-slate-600 whitespace-pre-wrap">
                {mockXML.split("\n").map((line, i) => (
                  <div key={i} className="hover:bg-slate-50 px-2 -mx-2 rounded">
                    {line.includes("<") ? (
                      <>
                        {line.split(/(<\/?[\w\s=".-]+>)/g).map((part, j) => {
                          if (part.startsWith("</")) {
                            return (
                              <span key={j} className="text-rose-500">
                                {part}
                              </span>
                            );
                          }
                          if (part.startsWith("<")) {
                            return (
                              <span key={j} className="text-indigo-500">
                                {part}
                              </span>
                            );
                          }
                          return (
                            <span key={j} className="text-slate-700">
                              {part}
                            </span>
                          );
                        })}
                      </>
                    ) : (
                      line
                    )}
                  </div>
                ))}
              </pre>
            )}
          </div>
        )}
      </div>

      {/* Confidence Footer */}
      {isComplete && (
        <div className="px-5 py-3 border-t border-slate-100 bg-slate-50/50">
          <div className="flex items-center justify-between text-xs">
            <div className="flex items-center gap-4">
              <div className="flex items-center gap-1.5">
                <div className="h-2 w-2 rounded-full bg-emerald-500" />
                <span className="text-slate-500">Confidence:</span>
                <span className="font-semibold text-slate-700">98%</span>
              </div>
              <div className="flex items-center gap-1.5">
                <span className="text-slate-500">Fields:</span>
                <span className="font-semibold text-slate-700">25</span>
              </div>
            </div>
            <span className="text-slate-400">Processed in 2.3s</span>
          </div>
        </div>
      )}
    </div>
  );
}