<?php

namespace Modules\Business\App\Exports;

use App\Models\Purchase;
use App\Models\PurchaseReturnDetail;
use App\Models\Sale;
use App\Models\SaleDetails;
use App\Models\SaleReturnDetails;
use App\Models\Vat;
use App\Models\VatTransaction;
use App\Traits\DateFilterTrait;
use Illuminate\Contracts\View\View;
use Maatwebsite\Excel\Concerns\FromView;

class ExportTaxReport implements FromView
{
    use DateFilterTrait;

    public function view(): View
    {
        $businessId = auth()->user()->business_id;
        $type = request('type') ?? 'sales';

        $duration = request('custom_days') ?: 'today';

        // SALES QUERY
        $salesQuery = Sale::with('party', 'payment_type', 'transactions')
            ->where('business_id', $businessId);

        $this->applyDateFilter($salesQuery, $duration, 'saleDate', request('from_date'), request('to_date'));

        if (request('search')) {
            $search = request('search');
            $salesQuery->where(function ($query) use ($search) {
                $query->where('invoiceNumber', 'like', '%' . $search . '%')
                    ->orWhere('totalAmount', 'like', '%' . $search . '%')
                    ->orWhere('discountAmount', 'like', '%' . $search . '%')
                    ->orWhereHas('party', fn($q) => $q->where('name', 'like', '%' . $search . '%')->orWhere('tax_no', 'like', '%' . $search . '%'));
            });
        }

        $salesVatTotals = VatTransaction::where('vat_transactions.business_id', $businessId)
            ->where('vat_transactions.vatable_type', SaleDetails::class)
            ->join('sale_details', 'sale_details.id', '=', 'vat_transactions.vatable_id')
            ->join('sales', 'sales.id', '=', 'sale_details.sale_id')
            ->where('sales.business_id', $businessId)
            ->selectRaw('vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as total')
            ->groupBy('vat_transactions.vat_id')
            ->pluck('total','vat_transactions.vat_id')
            ->toArray();

        $salesReturnVatTotals = VatTransaction::where('vat_transactions.business_id', $businessId)
            ->where('vat_transactions.vatable_type', SaleReturnDetails::class)
            ->join('sale_return_details', 'sale_return_details.id', '=', 'vat_transactions.vatable_id')
            ->join('sale_details', 'sale_details.id', '=', 'sale_return_details.sale_detail_id')
            ->join('sales', 'sales.id', '=', 'sale_details.sale_id')
            ->where('sales.business_id', $businessId)
            ->selectRaw('vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as total')
            ->groupBy('vat_transactions.vat_id')
            ->pluck('total', 'vat_transactions.vat_id')
            ->toArray();

        $saleVatRowMap = VatTransaction::where('business_id', $businessId)
            ->where('vatable_type', \App\Models\SaleDetails::class)
            ->whereIn('vatable_id', function ($query) use ($businessId, $duration) {
                $query->select('sale_details.id')
                    ->from('sale_details')
                    ->join('sales', 'sales.id', '=', 'sale_details.sale_id')
                    ->where('sales.business_id', $businessId);

                if ($duration === 'custom_days' && request('from_date') && request('to_date')) {
                    $query->whereBetween('sales.saleDate', [request('from_date'), request('to_date')]);
                }
            })
            ->join('sale_details', 'sale_details.id', '=', 'vat_transactions.vatable_id')
            ->selectRaw('sale_details.sale_id, vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as total')
            ->groupBy('sale_details.sale_id', 'vat_transactions.vat_id')
            ->get()
            ->groupBy('sale_id')
            ->map(function ($items) {
                return $items->pluck('total', 'vat_id')->toArray();
            })
            ->toArray();

        $saleReturnVatRows = VatTransaction::where('vat_transactions.business_id', $businessId)
            ->where('vat_transactions.vatable_type', SaleReturnDetails::class)

            ->join('sale_return_details','sale_return_details.id','=','vat_transactions.vatable_id')
            ->join('sale_details','sale_details.id','=','sale_return_details.sale_detail_id')
            ->join('sales','sales.id','=','sale_details.sale_id')

            ->selectRaw('sales.id as sale_id, vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as vat_amount')
            ->groupBy('sales.id','vat_transactions.vat_id')
            ->get();

        $saleReturnVatRowMap = $saleReturnVatRows
            ->groupBy('sale_id')
            ->map(fn($rows)=>$rows->pluck('vat_amount','vat_id'))
            ->toArray();

        // PURCHASE QUERY
        $purchasesQuery = Purchase::with('party', 'payment_type', 'transactions')
            ->where('business_id', $businessId);

        $this->applyDateFilter($purchasesQuery, $duration, 'purchaseDate', request('from_date'), request('to_date'));

        if (request('search')) {
            $search = request('search');
            $purchasesQuery->where(function ($query) use ($search) {
                $query->where('invoiceNumber', 'like', '%' . $search . '%')
                    ->orWhere('totalAmount', 'like', '%' . $search . '%')
                    ->orWhere('discountAmount', 'like', '%' . $search . '%')
                    ->orWhereHas('party', fn($q) => $q->where('name', 'like', '%' . $search . '%')->orWhere('tax_no', 'like', '%' . $search . '%'));
            });
        }

        $purchasesVatTotals = VatTransaction::where('vat_transactions.business_id', $businessId)
            ->where('vat_transactions.vatable_type', \App\Models\PurchaseDetails::class)
            ->join('purchase_details', 'purchase_details.id', '=', 'vat_transactions.vatable_id')
            ->join('purchases', 'purchases.id', '=', 'purchase_details.purchase_id')
            ->where('purchases.business_id', $businessId)
            ->selectRaw('vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as total')
            ->groupBy('vat_transactions.vat_id')
            ->pluck('total','vat_transactions.vat_id')
            ->toArray();


        $purchaseReturnVatTotals = VatTransaction::where('vat_transactions.business_id', $businessId)
            ->where('vat_transactions.vatable_type', PurchaseReturnDetail::class)
            ->join('purchase_return_details', 'purchase_return_details.id', '=', 'vat_transactions.vatable_id')
            ->join('purchase_details', 'purchase_details.id', '=', 'purchase_return_details.purchase_detail_id')
            ->join('purchases', 'purchases.id', '=', 'purchase_details.purchase_id')
            ->where('purchases.business_id', $businessId)
            ->selectRaw('vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as total')
            ->groupBy('vat_transactions.vat_id')
            ->pluck('total', 'vat_transactions.vat_id')
            ->toArray();

        $purchaseVatRowMap = VatTransaction::where('business_id', $businessId)
            ->where('vatable_type', \App\Models\PurchaseDetails::class)
            ->whereIn('vatable_id', function ($query) use ($businessId, $duration) {
                $query->select('purchase_details.id')
                    ->from('purchase_details')
                    ->join('purchases', 'purchases.id', '=', 'purchase_details.purchase_id')
                    ->where('purchases.business_id', $businessId);

                if ($duration === 'custom_date' && request('from_date') && request('to_date')) {
                    $query->whereBetween('purchases.purchaseDate', [request('from_date'), request('to_date')]);
                }
            })
            ->join('purchase_details', 'purchase_details.id', '=', 'vat_transactions.vatable_id')
            ->selectRaw('purchase_details.purchase_id, vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as total')
            ->groupBy('purchase_details.purchase_id', 'vat_transactions.vat_id')
            ->get()
            ->groupBy('purchase_id')
            ->map(function ($items) {
                return $items->pluck('total', 'vat_id')->toArray();
            })
            ->toArray();

        $purchaseReturnVatRows = VatTransaction::where('vat_transactions.business_id', $businessId)
            ->where('vat_transactions.vatable_type', PurchaseReturnDetail::class)

            ->join('purchase_return_details','purchase_return_details.id','=','vat_transactions.vatable_id')
            ->join('purchase_details','purchase_details.id','=','purchase_return_details.purchase_detail_id')
            ->join('purchases','purchases.id','=','purchase_details.purchase_id')

            ->selectRaw('purchases.id as purchase_id, vat_transactions.vat_id, SUM(vat_transactions.vat_amount) as vat_amount')
            ->groupBy('purchases.id','vat_transactions.vat_id')
            ->get();

        $purchaseReturnVatRowMap = $purchaseReturnVatRows
            ->groupBy('purchase_id')
            ->map(fn($rows) => $rows->pluck('vat_amount','vat_id'))
            ->toArray();

        // TAB CONTROL
        $sales = collect();
        $purchases = collect();

        $limit = request('per_page') ?? 20;

        if ($type === 'sales') {
            $sales = $salesQuery->latest()->limit($limit)->get();
        }

        if ($type === 'purchases') {
            $purchases = $purchasesQuery->latest()->limit($limit)->get();
        }

        $vats = Vat::where('business_id', $businessId)->get();

        return view('business::reports.vats.excel-csv',
            compact(
                'sales',
                'salesVatTotals',
                'salesReturnVatTotals',
                'saleVatRowMap',
                'saleReturnVatRowMap',
                'purchases',
                'purchasesVatTotals',
                'purchaseReturnVatTotals',
                'purchaseVatRowMap',
                'purchaseReturnVatRowMap',
                'vats',
                'type'
            )
        );
    }
}