<?php

namespace App\Filament\Pages;

use App\Models\Customer;
use App\Models\DelayedGood;
use App\Models\EggCollection;
use App\Models\EggCollectionItem;
use App\Models\Expense;
use App\Models\Feed;
use App\Models\FeedPurchase;
use App\Models\Order;
use App\Models\Payroll;
use BackedEnum;
use BezhanSalleh\FilamentShield\Traits\HasPageShield;
use Carbon\Carbon;
use Filament\Forms\Components\DatePicker;
use Filament\Forms\Components\Select;
use Filament\Forms\Concerns\InteractsWithForms;
use Filament\Forms\Contracts\HasForms;
use Filament\Pages\Page;
use Filament\Schemas\Components\Section;
use Filament\Schemas\Schema;
use Filament\Support\Icons\Heroicon;
use Illuminate\Support\Facades\DB;

class Analisys extends Page implements HasForms
{
    use HasPageShield, InteractsWithForms;

    public ?array $data = [];

    public function mount(): void
    {
        $this->form->fill([
            'period' => 'this_month',
            'from_date' => now()->startOfMonth()->format('d F Y'),
            'to_date' => now()->format('d F Y'),
        ]);
    }

    public function form(Schema $form): Schema
    {
        return $form
            ->schema([
                Section::make()
                    ->schema([
                        Select::make('period')
                            ->label('Periode Cepat')
                            ->options([
                                'today' => 'Hari Ini',
                                'this_week' => 'Minggu Ini',
                                'this_month' => 'Bulan Ini',
                                'this_year' => 'Tahun Ini',
                                'custom' => 'Kustom Tanggal',
                            ])
                            ->live()
                            ->afterStateUpdated(function ($state, $set, $get) {
                                if ($state === 'today') {
                                    $set('from_date', now()->format('d F Y'));
                                    $set('to_date', now()->format('d F Y'));
                                } elseif ($state === 'this_week') {
                                    $set('from_date', now()->startOfWeek()->format('d F Y'));
                                    $set('to_date', now()->endOfWeek()->format('d F Y'));
                                } elseif ($state === 'this_month') {
                                    $set('from_date', now()->startOfMonth()->format('d F Y'));
                                    $set('to_date', now()->endOfMonth()->format('d F Y'));
                                } elseif ($state === 'this_year') {
                                    $set('from_date', now()->startOfYear()->format('d F Y'));
                                    $set('to_date', now()->endOfYear()->format('d F Y'));
                                }
                                $this->dispatch('stats-updated');
                            })
                            ->native(false),

                        DatePicker::make('from_date')
                            ->label('Dari Tanggal')
                            ->native(false)
                            ->displayFormat('d F Y')
                            ->live()
                            ->afterStateUpdated(function ($set) {
                                $set('period', 'custom');
                                $this->dispatch('stats-updated');
                            }),

                        DatePicker::make('to_date')
                            ->label('Sampai Tanggal')
                            ->native(false)
                            ->displayFormat('d F Y')
                            ->live()
                            ->afterStateUpdated(function ($set) {
                                $set('period', 'custom');
                                $this->dispatch('stats-updated');
                            }),
                    ])
                    ->compact()
                    ->columns(3),
            ])
            ->statePath('data');
    }

    protected static string|BackedEnum|null $navigationIcon = Heroicon::OutlinedChartPie;

    protected static ?string $navigationLabel = 'Analisis';

    protected static ?string $slug = 'analisys';

    protected static ?string $title = 'Analisis';

    protected string $view = 'filament.pages.analisys';

    public function getViewData(): array
    {
        $formatNumber = fn ($val) => number_format((float) $val, $val == floor($val) ? 0 : 2, ',', '.');
        $now = now();

        $fromDateInput = $this->data['from_date'] ?? now()->startOfMonth()->format('d F Y');
        $toDateInput = $this->data['to_date'] ?? now()->format('d F Y');

        // Normalize for DB queries
        $fromDate = Carbon::parse($fromDateInput)->format('Y-m-d');
        $toDate = Carbon::parse($toDateInput)->format('Y-m-d');

        // 1. Customer Count
        $customerCount = Customer::count();

        // 2. Egg Production by Unit - Optimized join query
        $totalEggsByUnit = EggCollectionItem::query()
            ->join('egg_collections', 'egg_collection_items.egg_collection_id', '=', 'egg_collections.id')
            ->join('units', 'egg_collection_items.unit_id', '=', 'units.id')
            ->whereNull('egg_collections.deleted_at')
            ->whereBetween('egg_collections.production_date', [$fromDate, $toDate])
            ->selectRaw('units.name as unit_name, 
                        sum(case when is_broken = 0 then quantity else 0 end) as total_good,
                        sum(case when is_broken = 1 then quantity else 0 end) as total_broken')
            ->groupBy('units.name')
            ->get()
            ->map(fn ($item) => [
                'unit_name' => $item->unit_name,
                'total_good' => $formatNumber($item->total_good),
                'total_broken' => $formatNumber($item->total_broken),
            ]);

        // 3. Orders Stats - Combined count and sum
        $orderStats = Order::whereBetween('order_date', [$fromDate, $toDate])
            ->selectRaw('count(*) as count, sum(total_amount) as total')
            ->first();
        $orderCount = (int) ($orderStats->count ?? 0);
        $orderRevenue = (float) ($orderStats->total ?? 0);

        // 4. Delayed Goods Stats - Combined by unit
        $delayedStatsByUnit = DelayedGood::query()
            ->join('units', 'delayed_goods.unit_id', '=', 'units.id')
            ->whereBetween('delayed_goods.stored_date', [$fromDate, $toDate])
            ->selectRaw('units.name as unit_name, sum(quantity) as total')
            ->groupBy('units.name')
            ->get()
            ->map(fn ($item) => [
                'unit_name' => $item->unit_name,
                'total' => $formatNumber($item->total),
            ]);

        // 5. Financial Totals in Range
        $delayedTotals = DelayedGood::whereBetween('stored_date', [$fromDate, $toDate])
            ->selectRaw('sum(total_amount) as total, sum(paid_amount) as paid')
            ->first();

        $delayedRevenue = (float) ($delayedTotals->total ?? 0);
        $paidAmountInRange = (float) ($delayedTotals->paid ?? 0);
        $totalRevenue = $orderRevenue + $delayedRevenue;

        $totalExpenses = (float) Expense::whereBetween('expense_date', [$fromDate, $toDate])->sum('amount');
        $totalPayroll = (float) Payroll::whereBetween('period_month', [Carbon::parse($fromDate)->format('Y-m'), Carbon::parse($toDate)->format('Y-m')])->sum('total_salary');
        $totalFeedPurchase = (float) FeedPurchase::whereBetween('purchase_date', [$fromDate, $toDate])->sum('total_price');

        $grossProfit = $totalRevenue - $totalFeedPurchase;
        $netProfit = $grossProfit - $totalExpenses - $totalPayroll;
        $totalReceivables = $delayedRevenue - $paidAmountInRange;

        $mainStats = [
            ['label' => 'Total Pelanggan', 'desc' => 'Jumlah pelanggan terdaftar', 'value' => $customerCount, 'prefix' => ''],
            ['label' => 'Total Pesanan', 'desc' => 'Jumlah transaksi pesanan', 'value' => $orderCount, 'prefix' => ''],
            ['label' => 'Laba Bersih', 'desc' => 'Setelah dikurangi beban operasional', 'value' => $formatNumber($netProfit), 'prefix' => 'Rp'],
            ['label' => 'Total Piutang', 'desc' => 'Piutang barang tertunda (periode)', 'value' => $formatNumber($totalReceivables), 'prefix' => 'Rp'],
            ['label' => 'Total Pendapatan', 'desc' => 'Akumulasi semua pemasukan', 'value' => $formatNumber($totalRevenue), 'prefix' => 'Rp'],
            ['label' => 'Laba Kotor', 'desc' => 'Pendapatan dikurangi biaya pakan', 'value' => $formatNumber($grossProfit), 'prefix' => 'Rp'],
            ['label' => 'Total Pengeluaran', 'desc' => 'Biaya operasional & umum', 'value' => $formatNumber($totalExpenses), 'prefix' => 'Rp'],
            ['label' => 'Total Penggajian', 'desc' => 'Total gaji karyawan', 'value' => $formatNumber($totalPayroll), 'prefix' => 'Rp'],
            ['label' => 'Belanja Pakan', 'desc' => 'Total pembelian pakan ayam', 'value' => $formatNumber($totalFeedPurchase), 'prefix' => 'Rp'],
        ];

        // 6. Top 5 Customers - Optimized summing
        $topCustomers = Customer::query()
            ->select('id', 'name', 'phone_number')
            ->withSum(['orders' => fn ($q) => $q->whereBetween('order_date', [$fromDate, $toDate])], 'total_amount')
            ->withSum(['delayedGoods' => fn ($q) => $q->whereBetween('stored_date', [$fromDate, $toDate])], 'total_amount')
            ->get()
            ->map(function ($customer) {
                $customer->total_spent = ($customer->orders_sum_total_amount ?? 0) + ($customer->delayed_goods_sum_total_amount ?? 0);

                return $customer;
            })
            ->sortByDesc('total_spent')
            ->take(5)
            ->values();

        // 7. Chart: Daily Production (Optimized query)
        $diffDays = Carbon::parse($fromDate)->diffInDays(Carbon::parse($toDate));
        $rangeQueryDays = collect(range(0, min($diffDays, 30)))->map(fn ($i) => Carbon::parse($fromDate)->addDays($i)->format('Y-m-d'))->values();

        $productionDataMap = EggCollection::whereBetween('production_date', [$fromDate, $toDate])
            ->selectRaw('production_date, sum(total_eggs) as good, sum(total_broken_eggs) as broken')
            ->groupBy('production_date')
            ->get()
            ->keyBy('production_date');

        $productionChartData = [
            'labels' => $rangeQueryDays->map(fn ($d) => Carbon::parse($d)->format('d M'))->values(),
            'good' => $rangeQueryDays->map(fn ($d) => (float) ($productionDataMap[$d]->good ?? 0))->values(),
            'broken' => $rangeQueryDays->map(fn ($d) => (float) ($productionDataMap[$d]->broken ?? 0))->values(),
        ];

        // 8. Monthly Financial Trends (Optimized aggregates)
        $months = collect(range(0, 5))->map(fn ($i) => Carbon::parse($toDate)->subMonths($i)->format('Y-m'))->reverse();

        $monthlyOrderRev = Order::whereIn(DB::raw("DATE_FORMAT(order_date, '%Y-%m')"), $months)
            ->selectRaw("DATE_FORMAT(order_date, '%Y-%m') as month, sum(total_amount) as total")
            ->groupBy('month')->pluck('total', 'month');

        $monthlyDelayedRev = DelayedGood::whereIn(DB::raw("DATE_FORMAT(stored_date, '%Y-%m')"), $months)
            ->selectRaw("DATE_FORMAT(stored_date, '%Y-%m') as month, sum(total_amount) as total")
            ->groupBy('month')->pluck('total', 'month');

        $monthlyExpenses = Expense::whereIn(DB::raw("DATE_FORMAT(expense_date, '%Y-%m')"), $months)
            ->selectRaw("DATE_FORMAT(expense_date, '%Y-%m') as month, sum(amount) as total")
            ->groupBy('month')->pluck('total', 'month');

        $monthlyPayroll = Payroll::whereIn('period_month', $months)
            ->selectRaw('period_month as month, sum(total_salary) as total')
            ->groupBy('month')->pluck('total', 'month');

        $monthlyFeed = FeedPurchase::whereIn(DB::raw("DATE_FORMAT(purchase_date, '%Y-%m')"), $months)
            ->selectRaw("DATE_FORMAT(purchase_date, '%Y-%m') as month, sum(total_price) as total")
            ->groupBy('month')->pluck('total', 'month');

        $financialChartData = [
            'labels' => $months->map(fn ($m) => Carbon::parse($m)->translatedFormat('M Y'))->values(),
            'revenue' => $months->map(fn ($m) => (float) (($monthlyOrderRev[$m] ?? 0) + ($monthlyDelayedRev[$m] ?? 0)))->values(),
            'expenses' => $months->map(fn ($m) => (float) (($monthlyExpenses[$m] ?? 0) + ($monthlyPayroll[$m] ?? 0) + ($monthlyFeed[$m] ?? 0)))->values(),
        ];
        $financialChartData['profit'] = $financialChartData['revenue']->map(fn ($rev, $i) => (float) ($rev - $financialChartData['expenses'][$i]))->values();

        // 9. Distribution Charts
        $expenseDistributionData = [
            'labels' => ['Gaji Karyawan', 'Belanja Pakan', 'Pengeluaran Umum'],
            'data' => [(float) $totalPayroll, (float) $totalFeedPurchase, (float) $totalExpenses],
        ];

        $salesByUnit = Order::whereBetween('order_date', [$fromDate, $toDate])
            ->join('units', 'orders.unit_id', '=', 'units.id')
            ->selectRaw('units.name, sum(total_amount) as total')
            ->groupBy('units.name')
            ->get();

        $debtStatusData = [
            'paid' => (float) $paidAmountInRange,
            'unpaid' => (float) ($delayedRevenue - $paidAmountInRange),
        ];

        $feedStocks = Feed::query()
            ->join('units', 'feeds.unit_id', '=', 'units.id')
            ->select('feeds.name', 'feeds.stock', 'units.alias as unit_alias')
            ->get();

        $productionByWarehouse = EggCollection::whereBetween('production_date', [$fromDate, $toDate])
            ->join('warehouses', 'egg_collections.warehouse_id', '=', 'warehouses.id')
            ->selectRaw('warehouses.name, sum(total_eggs) as total')
            ->groupBy('warehouses.name')
            ->get();

        $revenueSplitData = [
            'orders' => (float) $orderRevenue,
            'delayed' => (float) $delayedRevenue,
        ];

        return [
            'mainStats' => $mainStats,
            'totalEggsByUnit' => $totalEggsByUnit,
            'totalDelayedByUnit' => $delayedStatsByUnit,
            'topCustomers' => $topCustomers,
            'productionChart' => $productionChartData,
            'financialChart' => $financialChartData,
            'expenseDistribution' => $expenseDistributionData,
            'salesByUnit' => [
                'labels' => $salesByUnit->pluck('name')->values(),
                'data' => $salesByUnit->pluck('total')->map(fn ($v) => (float) $v)->values(),
            ],
            'debtStatus' => $debtStatusData,
            'feedStocks' => [
                'labels' => $feedStocks->pluck('name')->values(),
                'data' => $feedStocks->pluck('stock')->map(fn ($v) => (float) $v)->values(),
                'units' => $feedStocks->pluck('unit_alias')->values(),
            ],
            'productionByWarehouse' => [
                'labels' => $productionByWarehouse->pluck('name')->values(),
                'data' => $productionByWarehouse->pluck('total')->map(fn ($v) => (float) $v)->values(),
            ],
            'revenueSplit' => [
                'labels' => ['Penjualan Langsung', 'Barang Tertunda'],
                'data' => [$revenueSplitData['orders'], $revenueSplitData['delayed']],
            ],
            'formatNumber' => $formatNumber,
        ];
    }
}