<?php
namespace App\Services\Anagrafiche;

use App\Models\RubricaUniversale;
use App\Support\PhoneNumber;
use Illuminate\Support\Facades\Schema;

class RubricaPhoneLookupService
{
    public function findByPhone(?string $phone, ?int $adminId = null): ?RubricaUniversale
    {
        $digits = PhoneNumber::normalizeDigits((string) $phone);
        if ($digits === '') {
            return null;
        }

        $tail = strlen($digits) >= 7 ? substr($digits, -7) : $digits;
        if ($tail === '') {
            return null;
        }

        foreach ([[$digits, true], [$digits, false], [$tail, true], [$tail, false]] as [$needle, $directFirst]) {
            $found = $directFirst
                ? ($this->directQuery((string) $needle, $adminId)->first() ?: $this->channelQuery((string) $needle, $adminId)->first())
                : ($this->channelQuery((string) $needle, $adminId)->first() ?: $this->directQuery((string) $needle, $adminId)->first());

            if ($found instanceof RubricaUniversale) {
                return $found;
            }
        }

        return null;
    }

    private function directQuery(string $digits, ?int $adminId)
    {
        return RubricaUniversale::query()
            ->when($this->hasAmministratoreColumn() && $adminId && $adminId > 0, function ($query) use ($adminId): void {
                $query->where(function ($inner) use ($adminId): void {
                    $inner->where('amministratore_id', $adminId)
                        ->orWhereNull('amministratore_id');
                });
            })
            ->where(function ($query) use ($digits): void {
                $query
                    ->orWhereRaw($this->normalizedDigitsSql('telefono_cellulare') . ' LIKE ?', ['%' . $digits . '%'])
                    ->orWhereRaw($this->normalizedDigitsSql('telefono_ufficio') . ' LIKE ?', ['%' . $digits . '%'])
                    ->orWhereRaw($this->normalizedDigitsSql('telefono_casa') . ' LIKE ?', ['%' . $digits . '%']);

                if (Schema::hasColumn('rubrica_universale', 'telefono_cellulare_nazionale')) {
                    $query->orWhereRaw($this->normalizedDigitsSql('telefono_cellulare_nazionale') . ' LIKE ?', ['%' . $digits . '%']);
                }
            })
            ->orderByDesc('updated_at')
            ->orderByDesc('id');
    }

    private function channelQuery(string $digits, ?int $adminId)
    {
        if (! Schema::hasTable('rubrica_contatti_canali')) {
            return RubricaUniversale::query()->whereRaw('1 = 0');
        }

        return RubricaUniversale::query()
            ->select('rubrica_universale.*')
            ->join('rubrica_contatti_canali as rcc', 'rcc.rubrica_id', '=', 'rubrica_universale.id')
            ->when($this->hasAmministratoreColumn() && $adminId && $adminId > 0, function ($query) use ($adminId): void {
                $query->where(function ($inner) use ($adminId): void {
                    $inner->where('rubrica_universale.amministratore_id', $adminId)
                        ->orWhereNull('rubrica_universale.amministratore_id');
                });
            })
            ->whereIn('rcc.tipo', ['telefono', 'cellulare'])
            ->whereRaw($this->normalizedDigitsSql('rcc.valore') . ' LIKE ?', ['%' . $digits . '%'])
            ->orderByDesc('rcc.is_principale')
            ->orderByDesc('rcc.updated_at')
            ->orderByDesc('rubrica_universale.updated_at')
            ->orderByDesc('rubrica_universale.id');
    }

    private function hasAmministratoreColumn(): bool
    {
        return Schema::hasColumn('rubrica_universale', 'amministratore_id');
    }

    private function normalizedDigitsSql(string $column): string
    {
        return "REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(COALESCE({$column}, ''), ' ', ''), '+', ''), '-', ''), '(', ''), ')', '')";
    }
}