import 'package:flutter/material.dart';
import '../services/dio_client.dart';
import '../services/order_service.dart';


class OrderInvoiceScreen extends StatefulWidget {
  final String orderId;
  const OrderInvoiceScreen({super.key, required this.orderId});

  @override
  State<OrderInvoiceScreen> createState() => _OrderInvoiceScreenState();
}

class _OrderInvoiceScreenState extends State<OrderInvoiceScreen> {
  bool loading = true;
  Map invoice = {};

  @override
  void initState() {
    super.initState();
    load();
  }

  Future<void> load() async {
    final service = OrderService(DioClient.getInstance(context));
    final res = await service.getInvoice(widget.orderId);

    if (res['success'] == true) {
      invoice = res['invoice'] ?? {};
    }

    loading = false;
    setState(() {});
  }

  Widget _row(String label, dynamic value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(label,
              style: const TextStyle(fontSize: 14, color: Colors.grey)),
          Text(value?.toString() ?? "N/A",
              style:
              const TextStyle(fontSize: 15, fontWeight: FontWeight.w600)),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    final items = invoice['items'] ?? [];

    return Scaffold(
      appBar: AppBar(title: const Text("Invoice")),
      body: loading
          ? const Center(child: CircularProgressIndicator())
          : Padding(
        padding: const EdgeInsets.all(16),
        child: ListView(
          children: [
            const Text("Invoice Summary",
                style:
                TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
            const SizedBox(height: 10),

            _row("Invoice No", invoice['invoice_number']),
            _row("Invoice Date", invoice['invoice_date']),
            _row("Due Date", invoice['due_date']),
            _row("Payment Method", invoice['payment_method']),
            _row("Reference No", invoice['reference_no']),
            _row("Status", invoice['status']),

            const Divider(height: 30),

            const Text("Amount Details",
                style:
                TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
            const SizedBox(height: 10),

            _row("Amount (without GST)", invoice['final_amount']),
            _row("GST Amount", invoice['gst_amount']),
            _row("Final Amount With GST",
                invoice['final_amount_with_gst']),
            _row("Tax Type", invoice['tax_type']),
            _row("CGST %", invoice['cgst_percent']),
            _row("SGST %", invoice['sgst_percent']),
            _row("IGST %", invoice['igst_percent']),

            const Divider(height: 30),

            _row("Customer Name", invoice['customer_name']),
            _row("Company Name", invoice['company_name']),
            _row("Email", invoice['customer_email']),
            _row("Mobile", invoice['customer_mobile']),
            _row("Address", invoice['customer_address']),
            _row("Pincode", invoice['pincode']),
            _row("Notes", invoice['notes']),

            const Divider(height: 30),

            // PDF DOWNLOAD
            if (invoice['pdf_path'] != null)
              TextButton.icon(
                onPressed: () {
                  // open pdf
                },
                icon: const Icon(Icons.picture_as_pdf, color: Colors.red),
                label: const Text("Download PDF"),
              ),

            const SizedBox(height: 20),

            const Text("Invoice Items",
                style:
                TextStyle(fontSize: 17, fontWeight: FontWeight.bold)),
            const SizedBox(height: 10),

            ...List.generate(items.length, (i) {
              final item = items[i];

              return Card(
                margin: const EdgeInsets.only(bottom: 12),
                child: ListTile(
                  title: Text(item['description'] ?? "Item"),
                  subtitle: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text("Qty: ${item['qty'] ?? 0}"),
                      Text("Price: ₹${item['price'] ?? 0}"),
                    ],
                  ),
                  trailing: Text(
                    "₹${item['ttl_amount'] ?? 0}",
                    style: const TextStyle(
                        fontWeight: FontWeight.bold,
                        color: Colors.indigo),
                  ),
                ),
              );
            }),
          ],
        ),
      ),
    );
  }
}