<?php

namespace App\Services;

use App\Enums\AppointmentStatusEnum;
use App\Models\Appointment;
use App\Models\CompanySetting;
use Barryvdh\DomPDF\Facade\Pdf;
use Barryvdh\DomPDF\PDF as PdfWrapper;
use Carbon\Carbon;

class AppointmentGuideService
{
    private const DEFAULT_VALIDITY_DAYS = 30;

    public function canIssue(Appointment $appointment): bool
    {
        $released = in_array($appointment->status, [
            AppointmentStatusEnum::CONFIRMADO,
            AppointmentStatusEnum::CONCLUIDO,
        ], true);

        if (!$released) {
            return false;
        }

        if ($appointment->isExame()) {
            return $appointment->exams->isNotEmpty();
        }

        return $appointment->date !== null && $appointment->time !== null;
    }

    public function issue(Appointment $appointment, ?int $issuedByUserId = null): Appointment
    {
        if ($appointment->guide_issued_at) {
            return $appointment;
        }

        $appointment->update([
            'guide_issued_at'         => now(),
            'guide_valid_until'       => now()->addDays($this->validityDays())->toDateString(),
            'guide_issued_by_user_id' => $issuedByUserId,
            'service_price'           => $appointment->service_price ?? $this->servicePrice($appointment),
        ]);

        return $appointment->fresh([
            'user',
            'userDependent',
            'partnerAgreement',
            'partnerAgreementService',
            'exams.partnerAgreementService',
        ]);
    }

    public function pdf(Appointment $appointment, ?int $issuedByUserId = null): PdfWrapper
    {
        $appointment = $this->issue($appointment, $issuedByUserId);

        $view = $appointment->isExame()
            ? 'pdf.appointment_exam_guide'
            : 'pdf.appointment_guide';

        return Pdf::loadView($view, ['guide' => $this->data($appointment)])
            ->setPaper('a4');
    }

    public function fileName(Appointment $appointment): string
    {
        return "guia_{$appointment->order_number}.pdf";
    }

    /**
     * @return array<string, mixed>
     */
    public function data(Appointment $appointment): array
    {
        $price = $appointment->service_price ?? $this->servicePrice($appointment);

        return [
            'order_number'   => $appointment->order_number,
            'type'           => $appointment->type?->value,
            'holder_name'    => $appointment->user?->name,
            'holder_badge'   => $appointment->user?->registration,
            'holder_cpf'     => $appointment->user?->cpf,
            'dependent_name' => $appointment->userDependent?->name,
            // O nome do médico está embutido no nome do serviço cadastrado no convênio.
            'doctor_name'    => $appointment->partnerAgreementService?->name,
            'exams'          => $this->exams($appointment),
            'clinic_name'    => $appointment->partnerAgreement?->company_name,
            'clinic_address' => $this->clinicAddress($appointment),
            'clinic_phone'   => $appointment->partnerAgreement?->phone,
            'date'           => $appointment->date?->format('d/m/Y'),
            'time'           => $appointment->time ? Carbon::parse($appointment->time)->format('H:i') : null,
            'issued_at'      => $appointment->guide_issued_at?->format('d/m/Y'),
            'valid_until'    => $appointment->guide_valid_until?->format('d/m/Y'),
            'price'          => $this->money($price),
            'observations'   => $appointment->observations,
        ];
    }

    /**
     * @return array<int, array<string, string|null>>
     */
    private function exams(Appointment $appointment): array
    {
        if (!$appointment->isExame()) {
            return [];
        }

        return $appointment->exams
            ->map(fn($exam) => [
                'name'  => $exam->partnerAgreementService?->name,
                'price' => $this->money($exam->service_price),
            ])
            ->all();
    }

    private function money(string|float|null $value): ?string
    {
        return $value !== null ? 'R$ ' . number_format((float) $value, 2, ',', '.') : null;
    }

    private function servicePrice(Appointment $appointment): ?string
    {
        if ($appointment->isExame()) {
            return (string) $appointment->exams->sum(fn($exam) => (float) $exam->service_price);
        }

        $service = $appointment->partnerAgreementService;

        return $service?->associate_price ?? $service?->price;
    }

    private function clinicAddress(Appointment $appointment): ?string
    {
        $partner = $appointment->partnerAgreement;

        if (!$partner) {
            return null;
        }

        $parts = array_filter([$partner->address, $partner->neighborhood]);

        return $parts ? implode(' - ', $parts) : null;
    }

    private function validityDays(): int
    {
        $days = (int) (CompanySetting::query()->value('guide_validity_days') ?? 0);

        return $days > 0 ? $days : self::DEFAULT_VALIDITY_DAYS;
    }
}