<?php

namespace Modules\Countries\Http\Controllers;

use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Modules\Countries\Http\Requests\StoreCountryRequest;
use Modules\Countries\Http\Requests\UpdateCountryRequest;
use Modules\Countries\Models\Country;
use Modules\Countries\Support\CountryUsageReport;

class CountriesController extends Controller
{
    /**
     * Display ISO 3166 country records.
     */
    public function index(Request $request): View
    {
        $search = trim((string) $request->query('search', ''));
        $status = (string) $request->query('status', 'all');
        $region = (string) $request->query('region', 'all');

        $countries = Country::query()
            ->when($search !== '', function ($query) use ($search): void {
                $query->where(function ($nested) use ($search): void {
                    $nested->where('name', 'ilike', "%{$search}%")
                        ->orWhere('official_name', 'ilike', "%{$search}%")
                        ->orWhere('common_name', 'ilike', "%{$search}%")
                        ->orWhere('display_name', 'ilike', "%{$search}%")
                        ->orWhere('native_name', 'ilike', "%{$search}%")
                        ->orWhere('alpha2', 'ilike', "%{$search}%")
                        ->orWhere('alpha3', 'ilike', "%{$search}%")
                        ->orWhere('numeric', 'ilike', "%{$search}%")
                        ->orWhere('currency_code', 'ilike', "%{$search}%")
                        ->orWhere('calling_code', 'ilike', "%{$search}%");
                });
            })
            ->when($status === 'active', fn ($query) => $query->where('is_active', true))
            ->when($status === 'inactive', fn ($query) => $query->where('is_active', false))
            ->when($region !== 'all' && $region !== '', fn ($query) => $query->where('region', $region))
            ->ordered()
            ->paginate(50)
            ->withQueryString();

        $activeCount = Country::query()->where('is_active', true)->count();
        $inactiveCount = Country::query()->where('is_active', false)->count();
        $totalCount = Country::query()->count();
        $regions = Country::query()->whereNotNull('region')->distinct()->orderBy('region')->pluck('region');

        return view('countries::index', compact('countries', 'activeCount', 'inactiveCount', 'totalCount', 'search', 'status', 'region', 'regions'));
    }

    /**
     * Show the country creation form.
     */
    public function create(): View
    {
        return view('countries::create', ['country' => new Country()]);
    }

    /**
     * Store a new ISO country record.
     */
    public function store(StoreCountryRequest $request): RedirectResponse
    {
        $country = Country::query()->create($this->payload($request));

        return redirect()->route('countries.show', $country)->with('success', 'Country created.');
    }

    /**
     * Show a country record.
     */
    public function show(Country $country, CountryUsageReport $usageReport): View
    {
        $country->load(['subdivisions' => fn ($query) => $query->ordered()->limit(250)]);
        $usageRows = $usageReport->forCountry($country);

        return view('countries::show', compact('country', 'usageRows'));
    }

    /**
     * Show the edit form.
     */
    public function edit(Country $country): View
    {
        return view('countries::edit', compact('country'));
    }

    /**
     * Update all editable ISO/support fields.
     */
    public function update(UpdateCountryRequest $request, Country $country): RedirectResponse
    {
        $country->update($this->payload($request));

        return redirect()->route('countries.show', $country)->with('success', 'Country updated.');
    }

    /**
     * Soft-delete a custom/retired country record.
     */
    public function destroy(Country $country): RedirectResponse
    {
        $country->delete();

        return redirect()->route('countries.index')->with('success', 'Country archived.');
    }

    /**
     * Build the database payload from validated request data.
     *
     * @param StoreCountryRequest|UpdateCountryRequest $request
     * @return array<string, mixed>
     */
    private function payload(StoreCountryRequest|UpdateCountryRequest $request): array
    {
        $data = $request->validated();

        foreach (['alpha2', 'alpha3', 'currency_code', 'ioc_code', 'fifa_code'] as $key) {
            if (isset($data[$key]) && is_string($data[$key])) {
                $data[$key] = strtoupper(trim($data[$key]));
            }
        }

        if (isset($data['numeric']) && is_string($data['numeric'])) {
            $data['numeric'] = str_pad(trim($data['numeric']), 3, '0', STR_PAD_LEFT);
        }

        foreach (['languages', 'timezones', 'metadata'] as $jsonField) {
            $value = $data[$jsonField] ?? null;
            $data[$jsonField] = blank($value) ? null : json_decode((string) $value, true, 512, JSON_THROW_ON_ERROR);
        }

        foreach (['is_active', 'independent', 'un_member'] as $booleanField) {
            $data[$booleanField] = $request->boolean($booleanField);
        }

        return $data;
    }
}