<?php

namespace App\Http\Controllers;

use App\Models\Contact;
use App\Models\ContactGroup;
use App\Services\Recipients\RecipientResolutionResult;
use App\Services\Recipients\RecipientResolver;
use App\Services\Sms\SmsMessageComposer;
use Illuminate\Contracts\View\View;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;

class RecipientSelectionController extends Controller
{
    public function index(Request $request, SmsMessageComposer $messageComposer): View
    {
        return $this->view($request, messageComposer: $messageComposer);
    }

    public function search(Request $request): JsonResponse
    {
        $search = trim((string) $request->query('q', ''));
        $like = '%'.str_replace(['%', '_'], ['\%', '\_'], $search).'%';

        $contacts = Contact::query()
            ->with('phoneNumbers')
            ->search($search)
            ->orderByDesc('is_favorite')
            ->orderBy('last_name')
            ->orderBy('first_name')
            ->limit(10)
            ->get()
            ->map(function (Contact $contact): array {
                $primaryPhone = $contact->phoneNumbers->firstWhere('is_primary', true)
                    ?? $contact->phoneNumbers->first();

                return [
                    'type' => 'contact',
                    'id' => $contact->id,
                    'label' => $contact->displayName(),
                    'meta' => $primaryPhone?->normalized_number
                        ?: $primaryPhone?->raw_number
                        ?: $contact->email
                        ?: ucfirst($contact->source),
                    'source' => $contact->source,
                    'is_favorite' => $contact->is_favorite,
                ];
            });

        $groups = ContactGroup::query()
            ->withCount('contacts')
            ->when($search !== '', function ($query) use ($like): void {
                $query->where(function ($query) use ($like): void {
                    $query
                        ->where('name', 'like', $like)
                        ->orWhere('description', 'like', $like);
                });
            })
            ->orderByDesc('is_favorite')
            ->orderBy('name')
            ->limit(10)
            ->get()
            ->map(fn (ContactGroup $group): array => [
                'type' => 'group',
                'id' => $group->id,
                'label' => $group->name,
                'meta' => $group->contacts_count.' contact(s)',
                'source' => $group->source,
                'is_favorite' => $group->is_favorite,
            ]);

        return response()->json([
            'results' => $groups->concat($contacts)->values(),
        ]);
    }

    public function preview(Request $request, RecipientResolver $resolver, SmsMessageComposer $messageComposer): View|RedirectResponse
    {
        $validated = $request->validate([
            'q' => ['nullable', 'string', 'max:255'],
            'message' => ['nullable', 'string', 'max:612'],
            'include_sms_header' => ['nullable', 'boolean'],
            'include_sms_footer' => ['nullable', 'boolean'],
            'contact_ids' => ['array'],
            'contact_ids.*' => ['integer', Rule::exists('contacts', 'id')->whereNull('deleted_at')],
            'group_ids' => ['array'],
            'group_ids.*' => ['integer', Rule::exists('contact_groups', 'id')->whereNull('deleted_at')],
        ]);

        $contactIds = $validated['contact_ids'] ?? [];
        $groupIds = $validated['group_ids'] ?? [];

        if ($contactIds === [] && $groupIds === []) {
            return redirect()
                ->route('recipients.index', ['q' => $validated['q'] ?? null])
                ->withErrors(['selection' => 'Selectionnez au moins un contact ou un groupe.'])
                ->withInput();
        }

        return $this->view(
            $request,
            $resolver->resolve($contactIds, $groupIds),
            $contactIds,
            $groupIds,
            $messageComposer,
        );
    }

    /**
     * @param  array<int, int|string>  $selectedContactIds
     * @param  array<int, int|string>  $selectedGroupIds
     */
    private function view(
        Request $request,
        ?RecipientResolutionResult $resolution = null,
        array $selectedContactIds = [],
        array $selectedGroupIds = [],
        ?SmsMessageComposer $messageComposer = null,
    ): View {
        $messageComposer ??= app(SmsMessageComposer::class);
        $messageSettings = $messageComposer->settings();
        $oldHeaderChoice = $request->old('include_sms_header');
        $oldFooterChoice = $request->old('include_sms_footer');
        $hasHeaderChoice = $oldHeaderChoice !== null || $request->has('include_sms_header');
        $hasFooterChoice = $oldFooterChoice !== null || $request->has('include_sms_footer');
        $includeHeader = $hasHeaderChoice
            ? filter_var($oldHeaderChoice ?? $request->input('include_sms_header'), FILTER_VALIDATE_BOOLEAN)
            : $messageSettings['header'] !== '';
        $includeFooter = $hasFooterChoice
            ? filter_var($oldFooterChoice ?? $request->input('include_sms_footer'), FILTER_VALIDATE_BOOLEAN)
            : $messageSettings['footer'] !== '';
        $messageBody = (string) $request->old('message', $request->input('message', ''));

        $search = trim((string) $request->input('q', ''));
        $like = '%'.str_replace(['%', '_'], ['\%', '\_'], $search).'%';

        $contacts = Contact::query()
            ->with(['groups', 'phoneNumbers'])
            ->search($search)
            ->orderByDesc('is_favorite')
            ->orderBy('last_name')
            ->orderBy('first_name')
            ->limit(50)
            ->get();

        $groups = ContactGroup::query()
            ->withCount('contacts')
            ->when($search !== '', function ($query) use ($like): void {
                $query->where(function ($query) use ($like): void {
                    $query
                        ->where('name', 'like', $like)
                        ->orWhere('description', 'like', $like);
                });
            })
            ->orderByDesc('is_favorite')
            ->orderBy('name')
            ->limit(50)
            ->get();

        return view('recipients.index', [
            'contacts' => $contacts,
            'groups' => $groups,
            'search' => $search,
            'selectedContactIds' => collect($selectedContactIds)->map(fn (int|string $id): int => (int) $id)->all(),
            'selectedGroupIds' => collect($selectedGroupIds)->map(fn (int|string $id): int => (int) $id)->all(),
            'selectedContacts' => Contact::query()
                ->whereKey($selectedContactIds)
                ->orderBy('last_name')
                ->orderBy('first_name')
                ->get(),
            'selectedGroups' => ContactGroup::query()
                ->whereKey($selectedGroupIds)
                ->orderBy('name')
                ->get(),
            'resolution' => $resolution,
            'smsHeader' => $messageSettings['header'],
            'smsFooter' => $messageSettings['footer'],
            'includeSmsHeader' => $includeHeader,
            'includeSmsFooter' => $includeFooter,
            'composedMessage' => $messageComposer->compose($messageBody, $includeHeader, $includeFooter),
        ]);
    }
}