<?php
namespace App\Http\Controllers\Fornitore;

use App\Http\Controllers\Controller;
use App\Models\Fornitore;
use App\Models\FornitoreDipendente;
use App\Models\User;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Str;
use Spatie\Permission\Models\Role;

class DipendenteController extends Controller
{
    public function index()
    {
        $fornitore = $this->resolveFornitoreForUser();

        return redirect()->to(
            \App\Filament\Pages\Fornitore\Collaboratori::getUrl(
                ['fornitore' => (int) $fornitore->id],
                panel: 'admin-filament'
            )
        );
    }

    public function store(Request $request): RedirectResponse
    {
        $fornitore = $this->resolveFornitoreForUser();

        $validated = $request->validate([
            'nome'               => ['required', 'string', 'max:100'],
            'cognome'            => ['nullable', 'string', 'max:100'],
            'email'              => ['nullable', 'email', 'max:255'],
            'telefono'           => ['nullable', 'string', 'max:50'],
            'note'               => ['nullable', 'string', 'max:2000'],
            'create_user_access' => ['nullable', 'boolean'],
            'access_password'    => ['nullable', 'string', 'min:8', 'max:100'],
        ]);

        $email = trim((string) ($validated['email'] ?? ''));
        if ($email !== '') {
            $exists = FornitoreDipendente::query()
                ->where('fornitore_id', $fornitore->id)
                ->whereRaw('LOWER(email) = ?', [mb_strtolower($email)])
                ->exists();
            if ($exists) {
                return back()->withErrors(['email' => 'Esiste gia un dipendente con questa email.'])->withInput();
            }
        }

        $dipendente                     = new FornitoreDipendente();
        $dipendente->fornitore_id       = (int) $fornitore->id;
        $dipendente->nome               = trim((string) $validated['nome']);
        $dipendente->cognome            = trim((string) ($validated['cognome'] ?? '')) ?: null;
        $dipendente->email              = $email !== '' ? $email : null;
        $dipendente->telefono           = trim((string) ($validated['telefono'] ?? '')) ?: null;
        $dipendente->note               = trim((string) ($validated['note'] ?? '')) ?: null;
        $dipendente->attivo             = true;
        $dipendente->created_by_user_id = Auth::id();
        $dipendente->updated_by_user_id = Auth::id();

        $accessPassword  = trim((string) ($validated['access_password'] ?? ''));
        $createdPassword = null;

        if ((bool) ($validated['create_user_access'] ?? false) && $email !== '') {
            $user = User::query()->whereRaw('LOWER(email) = ?', [mb_strtolower($email)])->first();
            if (! $user) {
                $createdPassword = $accessPassword !== '' ? $accessPassword : Str::random(12);
                $user            = User::query()->create([
                    'name'              => trim($dipendente->nome . ' ' . ($dipendente->cognome ?? '')),
                    'email'             => $email,
                    'password'          => Hash::make($createdPassword),
                    'email_verified_at' => now(),
                ]);
            } elseif ($accessPassword !== '') {
                $user->password = Hash::make($accessPassword);
                $user->save();
                $createdPassword = $accessPassword;
            }

            $role = Role::query()->where('name', 'fornitore')->first();
            if ($role) {
                $user->assignRole($role);
            }

            $dipendente->user_id = (int) $user->id;
        }

        $dipendente->save();

        $redirect = redirect()->route('fornitore.dipendenti.index')
            ->with('success', 'Dipendente creato correttamente.');

        if ($createdPassword !== null && $email !== '') {
            $redirect->with('access_credentials', [
                'email'    => $email,
                'password' => $createdPassword,
            ]);
        }

        return $redirect;
    }

    public function update(Request $request, FornitoreDipendente $dipendente): RedirectResponse
    {
        $fornitore = $this->resolveFornitoreForUser();
        $this->authorizeDipendente($dipendente, $fornitore);

        $validated = $request->validate([
            'nome'     => ['required', 'string', 'max:100'],
            'cognome'  => ['nullable', 'string', 'max:100'],
            'telefono' => ['nullable', 'string', 'max:50'],
            'attivo'   => ['nullable', 'boolean'],
            'note'     => ['nullable', 'string', 'max:2000'],
        ]);

        $dipendente->update([
            'nome'               => trim((string) $validated['nome']),
            'cognome'            => trim((string) ($validated['cognome'] ?? '')) ?: null,
            'telefono'           => trim((string) ($validated['telefono'] ?? '')) ?: null,
            'attivo'             => (bool) ($validated['attivo'] ?? false),
            'note'               => trim((string) ($validated['note'] ?? '')) ?: null,
            'updated_by_user_id' => Auth::id(),
        ]);

        return redirect()->route('fornitore.dipendenti.index')
            ->with('success', 'Dipendente aggiornato.');
    }

    public function toggle(FornitoreDipendente $dipendente): RedirectResponse
    {
        $fornitore = $this->resolveFornitoreForUser();
        $this->authorizeDipendente($dipendente, $fornitore);

        $dipendente->update([
            'attivo'             => ! $dipendente->attivo,
            'updated_by_user_id' => Auth::id(),
        ]);

        return back()->with('success', 'Stato dipendente aggiornato.');
    }

    private function resolveFornitoreForUser(): Fornitore
    {
        $user = Auth::user();

        $fornitore = null;

        if ($user) {
            $email = mb_strtolower(trim((string) $user->email));

            if ($email !== '') {
                $fornitore = Fornitore::query()
                    ->whereRaw('LOWER(email) = ?', [$email])
                    ->withCount(['ticketInterventi', 'dipendenti'])
                    ->orderByDesc('ticket_interventi_count')
                    ->orderByDesc('dipendenti_count')
                    ->orderByDesc('id')
                    ->first();
            }

            if (! $fornitore) {
                $link = FornitoreDipendente::query()
                    ->where('attivo', true)
                    ->where(function ($q) use ($user): void {
                        $q->where('user_id', (int) $user->id)
                            ->orWhereRaw('LOWER(email) = ?', [mb_strtolower((string) $user->email)]);
                    })
                    ->orderByRaw('CASE WHEN user_id = ? THEN 0 ELSE 1 END', [(int) $user->id])
                    ->orderByDesc('id')
                    ->first();

                if ($link) {
                    $fornitore = Fornitore::query()->find((int) $link->fornitore_id);
                }
            }
        }

        abort_unless($fornitore, 403, 'Profilo fornitore non collegato.');

        return $fornitore;
    }

    private function authorizeDipendente(FornitoreDipendente $dipendente, Fornitore $fornitore): void
    {
        abort_unless((int) $dipendente->fornitore_id === (int) $fornitore->id, 403);
    }
}