<?php

namespace App\Http\Controllers\Qms;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Qms\Concerns\ScopesToAccount;
use App\Models\Branch;
use App\Models\ServiceQueue;
use App\Models\Ticket;
use App\Services\Qms\AuditLogger;
use App\Services\Qms\PlanService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class ServiceQueueController extends Controller
{
    use ScopesToAccount;

    public function index(Request $request): View
    {
        $this->authorizeAbility($request, 'queues.view');
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);

        $queues = ServiceQueue::owned($owner)
            ->where('organization_id', $organization->id)
            ->with(['branch', 'department'])
            ->when(true, fn ($q) => $this->scopeToBranch($request, $q))
            ->orderBy('name')
            ->paginate(20);

        return view('qms.queues.index', compact('queues', 'organization'));
    }

    public function show(Request $request, ServiceQueue $serviceQueue): View
    {
        $this->authorizeAbility($request, 'queues.view');
        $this->authorizeOwner($request, $serviceQueue);
        $serviceQueue->load(['branch', 'department']);

        $waiting = Ticket::owned($this->ownerRef($request))
            ->where('service_queue_id', $serviceQueue->id)
            ->where('status', 'waiting')
            ->count();

        return view('qms.queues.show', [
            'queue' => $serviceQueue,
            'waiting' => $waiting,
        ]);
    }

    public function create(Request $request): View
    {
        $this->authorizeAbility($request, 'queues.manage');
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);

        $branches = Branch::owned($owner)
            ->where('organization_id', $organization->id)
            ->where('is_active', true)
            ->orderBy('name')
            ->get();

        return view('qms.queues.create', [
            'organization' => $organization,
            'branches' => $branches,
            'strategies' => config('qms.queue_strategies'),
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $this->authorizeAbility($request, 'queues.manage');
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);

        $currentCount = ServiceQueue::owned($owner)->where('organization_id', $organization->id)->count();
        if (! app(PlanService::class)->canAddQueue($organization, $currentCount)) {
            return back()->withInput()->with('error', 'Your plan allows '.$currentCount.' queues. Upgrade to Pro for unlimited queues.');
        }

        $validated = $this->validatedQueue($request);

        abort_unless(
            Branch::owned($owner)->where('organization_id', $organization->id)->where('id', $validated['branch_id'])->exists(),
            404,
        );

        $queue = ServiceQueue::create([
            ...$validated,
            'owner_ref' => $owner,
            'organization_id' => $organization->id,
            'color' => $validated['color'] ?? '#4f46e5',
            'avg_service_seconds' => $validated['avg_service_seconds'] ?? 300,
            'is_active' => $request->boolean('is_active', true),
        ]);

        AuditLogger::record($owner, 'service_queue.created', $organization->id, $owner, ServiceQueue::class, $queue->id);

        return redirect()->route('qms.queues.show', $queue)->with('success', 'Queue created.');
    }

    public function edit(Request $request, ServiceQueue $serviceQueue): View
    {
        $this->authorizeAbility($request, 'queues.manage');
        $this->authorizeOwner($request, $serviceQueue);
        $owner = $this->ownerRef($request);

        return view('qms.queues.edit', [
            'queue' => $serviceQueue,
            'branches' => Branch::owned($owner)->where('organization_id', $serviceQueue->organization_id)->orderBy('name')->get(),
            'strategies' => config('qms.queue_strategies'),
        ]);
    }

    public function update(Request $request, ServiceQueue $serviceQueue): RedirectResponse
    {
        $this->authorizeAbility($request, 'queues.manage');
        $this->authorizeOwner($request, $serviceQueue);

        $validated = $this->validatedQueue($request, updating: true);
        $serviceQueue->update([
            ...$validated,
            'color' => $validated['color'] ?? $serviceQueue->color,
            'is_active' => $request->boolean('is_active', $serviceQueue->is_active),
        ]);

        AuditLogger::record($this->ownerRef($request), 'service_queue.updated', $serviceQueue->organization_id, $this->ownerRef($request), ServiceQueue::class, $serviceQueue->id);

        return redirect()->route('qms.queues.show', $serviceQueue)->with('success', 'Queue updated.');
    }

    public function pause(Request $request, ServiceQueue $serviceQueue): RedirectResponse
    {
        $this->authorizeAbility($request, 'queues.manage');
        $this->authorizeOwner($request, $serviceQueue);
        app(\App\Services\Qms\QueueEngine::class)->pauseQueue($serviceQueue, $this->ownerRef($request));

        return back()->with('success', 'Queue paused.');
    }

    public function resume(Request $request, ServiceQueue $serviceQueue): RedirectResponse
    {
        $this->authorizeAbility($request, 'queues.manage');
        $this->authorizeOwner($request, $serviceQueue);
        app(\App\Services\Qms\QueueEngine::class)->resumeQueue($serviceQueue, $this->ownerRef($request));

        return back()->with('success', 'Queue resumed.');
    }

    /**
     * @return array<string, mixed>
     */
    protected function validatedQueue(Request $request, bool $updating = false): array
    {
        return $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'description' => ['nullable', 'string', 'max:1000'],
            'branch_id' => ['required', 'exists:queue_branches,id'],
            'department_id' => ['nullable', 'exists:queue_departments,id'],
            'color' => ['nullable', 'string', 'max:20'],
            'prefix' => [$updating ? 'sometimes' : 'required', 'string', 'max:10'],
            'strategy' => ['required', 'string', 'in:'.implode(',', array_keys(config('qms.queue_strategies')))],
            'avg_service_seconds' => ['nullable', 'integer', 'min:60', 'max:7200'],
            'max_capacity' => ['nullable', 'integer', 'min:1'],
            'is_active' => ['boolean'],
        ]);
    }
}