<?php

declare(strict_types=1);

namespace App\Livewire\Plan;

use App\Enums\CategoryType;
use App\Models\BudgetLine;
use App\Models\Category;
use Livewire\Attributes\Layout;
use Livewire\Component;

#[Layout('layouts.app')]
class Index extends Component
{
    public int $year;

    public function mount(): void
    {
        $this->year = (int) now()->year;
    }

    public function setYear(int $year): void
    {
        $this->year = $year;
    }

    public function updateAmount(int $categoryId, ?int $month, string $amount): void
    {
        $category = Category::findOrFail($categoryId);
        $household = auth()->user()->currentHousehold;

        if ($category->household_id !== $household->id) {
            abort(403);
        }

        $amount = is_numeric($amount) ? (float) $amount : 0.0;

        BudgetLine::updateOrCreate(
            [
                'household_id' => $household->id,
                'category_id' => $categoryId,
                'year' => $this->year,
                'month' => $month,
            ],
            ['amount' => $amount],
        );
    }

    /**
     * @return array<int|string, float> keyed 'default',1..12
     */
    private function resolveRow(Category $category): array
    {
        $lines = $category->budgetLines()->where('year', $this->year)->get();
        $default = (float) ($lines->firstWhere('month', null)->amount ?? 0);

        $row = ['default' => $default];

        for ($m = 1; $m <= 12; $m++) {
            $override = $lines->firstWhere('month', $m);
            $row[$m] = $override ? (float) $override->amount : $default;
        }

        return $row;
    }

    public function render()
    {
        $household = auth()->user()->currentHousehold;

        $sections = collect(CategoryType::cases())->mapWithKeys(function (CategoryType $type) use ($household) {
            $categories = $household->categories()
                ->where('type', $type)
                ->orderBy('position')
                ->get()
                ->map(fn (Category $category) => [
                    'category' => $category,
                    'row' => $this->resolveRow($category),
                ]);

            $totals = ['default' => 0.0];
            for ($m = 1; $m <= 12; $m++) {
                $totals[$m] = 0.0;
            }
            foreach ($categories as $entry) {
                foreach ($entry['row'] as $key => $value) {
                    $totals[$key] += $value;
                }
            }

            return [$type->value => ['categories' => $categories, 'totals' => $totals]];
        });

        $remaining = [];
        for ($m = 1; $m <= 12; $m++) {
            $remaining[$m] = $sections['revenu']['totals'][$m]
                - $sections['depense']['totals'][$m]
                - $sections['epargne']['totals'][$m];
        }
        $sections['revenu'] = [...$sections['revenu'], 'remaining' => $remaining];

        return view('livewire.plan.index', [
            'types' => CategoryType::cases(),
            'sections' => $sections,
            'months' => ['Janv', 'Févr', 'Mars', 'Avr', 'Mai', 'Juin', 'Juil', 'Août', 'Sept', 'Oct', 'Nov', 'Déc'],
        ]);
    }
}