<?php

namespace App\Services\Frontdesk;

use App\Models\Organization;
use App\Services\Billing\BillingClient;
use App\Services\Messaging\MessagingCredentialsService;
use Illuminate\Support\Str;

class NotificationBillingService
{
    public function __construct(
        protected BillingClient $billing,
        protected NotificationPricingService $pricing,
        protected NotificationUsageService $usage,
        protected PlanService $plans,
        protected MessagingCredentialsService $credentials,
    ) {}

    public function usesCustomerEmail(Organization $organization): bool
    {
        return $this->credentials->forOrganization($organization)->hasValidBird();
    }

    public function usesCustomerSms(Organization $organization): bool
    {
        return $this->credentials->forOrganization($organization)->hasValidSms();
    }

    public function emailCostMinor(Organization $organization): int
    {
        if ($this->usesCustomerEmail($organization)) {
            return 0;
        }

        $allowance = $this->plans->freeEmailsPerMonth($organization);
        if ($allowance === null || $this->usage->emailCountThisMonth($organization) < $allowance) {
            return 0;
        }

        return $this->pricing->emailCostMinor();
    }

    public function canAffordEmail(Organization $organization): bool
    {
        if ($this->usesCustomerEmail($organization)) {
            return true;
        }

        $cost = $this->emailCostMinor($organization);
        if ($cost <= 0) {
            return true;
        }

        return $this->canAfford($organization->owner_ref, $cost);
    }

    public function canAffordSms(Organization $organization, string $message): bool
    {
        if ($this->usesCustomerSms($organization)) {
            return true;
        }

        $cost = $this->pricing->smsCostMinor($message);
        if ($cost <= 0) {
            return true;
        }

        return $this->canAfford($organization->owner_ref, $cost);
    }

    /**
     * Debit after a successful send. Returns false if the wallet could not be charged.
     * Customer relay keys bill the Ladill SMS/Bird wallet directly — never double-debit Frontdesk.
     */
    public function chargeEmail(Organization $organization, string $reference, string $description): bool
    {
        if ($this->usesCustomerEmail($organization)) {
            $this->usage->recordEmail($organization, 0);

            return true;
        }

        $cost = $this->emailCostMinor($organization);
        if ($cost <= 0) {
            $this->usage->recordEmail($organization, 0);

            return true;
        }

        if (! $this->debit($organization->owner_ref, $cost, 'email', $reference, $description)) {
            return false;
        }

        $this->usage->recordEmail($organization, $cost);

        return true;
    }

    public function chargeSms(Organization $organization, string $message, string $reference, string $description): bool
    {
        if ($this->usesCustomerSms($organization)) {
            $this->usage->recordSms($organization, 0);

            return true;
        }

        $cost = $this->pricing->smsCostMinor($message);
        if ($cost <= 0) {
            $this->usage->recordSms($organization, 0);

            return true;
        }

        if (! $this->debit($organization->owner_ref, $cost, 'sms', $reference, $description)) {
            return false;
        }

        $this->usage->recordSms($organization, $cost);

        return true;
    }

    private function canAfford(string $ownerRef, int $costMinor): bool
    {
        try {
            return $this->billing->canAfford($ownerRef, $costMinor);
        } catch (\Throwable) {
            return true;
        }
    }

    private function debit(string $ownerRef, int $costMinor, string $channel, string $reference, string $description): bool
    {
        try {
            return $this->billing->debit(
                $ownerRef,
                $costMinor,
                'notification_'.$channel,
                'frontdesk-notify-'.$reference.'-'.Str::uuid(),
                $description,
            );
        } catch (\Throwable) {
            return false;
        }
    }
}