<?php

namespace App\Services\Qms;

use App\Models\Branch;
use App\Models\Organization;
use Carbon\Carbon;

class PlanService
{
    public function planKey(Organization $organization): string
    {
        $settings = $organization->settings ?? [];
        $plan = (string) ($settings['plan'] ?? 'free');

        if (in_array($plan, ['pro', 'enterprise'], true) && ! empty($settings['plan_expires_at'])) {
            if (Carbon::parse($settings['plan_expires_at'])->isPast()) {
                return 'free';
            }
        }

        return array_key_exists($plan, config('qms.plans', [])) ? $plan : 'free';
    }

    public function plan(Organization $organization): string
    {
        return $this->planKey($organization);
    }

    public function isPro(Organization $organization): bool
    {
        return $this->planKey($organization) === 'pro';
    }

    public function isEnterprise(Organization $organization): bool
    {
        return $this->planKey($organization) === 'enterprise';
    }

    public function hasPaidPlan(Organization $organization): bool
    {
        return in_array($this->planKey($organization), ['pro', 'enterprise'], true);
    }

    public function activeBranchCount(Organization $organization): int
    {
        return Branch::query()
            ->where('organization_id', $organization->id)
            ->where('is_active', true)
            ->count();
    }

    public function maxBranches(Organization $organization): ?int
    {
        return config('qms.plans.'.$this->planKey($organization).'.max_branches');
    }

    public function maxQueues(Organization $organization): ?int
    {
        return config('qms.plans.'.$this->planKey($organization).'.max_queues');
    }

    public function canAddBranch(Organization $organization, int $currentCount): bool
    {
        $max = $this->maxBranches($organization);

        return $max === null || $currentCount < $max;
    }

    public function canAddQueue(Organization $organization, int $currentCount): bool
    {
        $max = $this->maxQueues($organization);

        return $max === null || $currentCount < $max;
    }

    public function proPricePerBranchMinor(): int
    {
        return (int) config(
            'qms.plans.pro.price_minor_per_branch',
            config('qms.plans.pro.price_minor', 249000)
        );
    }

    public function proPriceMinor(Organization $organization): int
    {
        return $this->priceForBranches('pro', $this->activeBranchCount($organization));
    }

    public function enterprisePricePerBranchMinor(): int
    {
        return (int) config('qms.plans.enterprise.price_minor_per_branch', 449000);
    }

    public function enterprisePriceMinor(Organization $organization): int
    {
        return $this->priceForBranches('enterprise', $this->activeBranchCount($organization));
    }

    /** Fixed branch count × per-branch rate (checkout when the user picks seats). */
    public function priceForBranches(string $plan, int $branches): int
    {
        $branches = max(1, $branches);
        $rate = $plan === 'enterprise'
            ? $this->enterprisePricePerBranchMinor()
            : $this->proPricePerBranchMinor();

        return $branches * $rate;
    }

    public function resolveCheckoutBranches(Organization $organization, int $requested): int
    {
        $branches = max(1, min(999, $requested));
        $active = max(1, $this->activeBranchCount($organization));

        return max($branches, $active);
    }

    public function canSubscribeEnterprise(Organization $organization): bool
    {
        return $this->activeBranchCount($organization) >= (int) config('qms.enterprise.min_branches', 2);
    }
}