<?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\Workflow;
use App\Models\WorkflowStep;
use App\Services\Qms\AuditLogger;
use App\Services\Qms\WorkflowService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class WorkflowController extends Controller
{
    use ScopesToAccount;

    public function __construct(
        protected WorkflowService $workflows,
    ) {}

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

        $workflows = Workflow::owned($owner)
            ->where('organization_id', $organization->id)
            ->withCount('steps')
            ->orderBy('name')
            ->get();

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

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

        return view('qms.workflows.create', [
            'organization' => $organization,
            'branches' => Branch::owned($owner)->where('organization_id', $organization->id)->orderBy('name')->get(),
            'queues' => ServiceQueue::owned($owner)->where('organization_id', $organization->id)->orderBy('name')->get(),
            'templates' => config('qms.industry_templates'),
            'workflowTemplates' => config('qms.workflow_templates'),
        ]);
    }

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

        $validated = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'description' => ['nullable', 'string'],
            'branch_id' => ['nullable', 'exists:queue_branches,id'],
            'industry_template' => ['nullable', 'string'],
            'steps' => ['required', 'array', 'min:1'],
            'steps.*.name' => ['required', 'string', 'max:255'],
            'steps.*.service_queue_id' => ['nullable', 'exists:queue_service_queues,id'],
        ]);

        $workflow = Workflow::create([
            'owner_ref' => $owner,
            'organization_id' => $organization->id,
            'name' => $validated['name'],
            'description' => $validated['description'] ?? null,
            'branch_id' => $validated['branch_id'] ?? null,
            'industry_template' => $validated['industry_template'] ?? null,
            'is_active' => true,
        ]);

        foreach ($validated['steps'] as $i => $step) {
            WorkflowStep::create([
                'workflow_id' => $workflow->id,
                'name' => $step['name'],
                'service_queue_id' => $step['service_queue_id'] ?? null,
                'sort_order' => $i + 1,
            ]);
        }

        AuditLogger::record($owner, 'workflow.created', $organization->id, $owner, Workflow::class, $workflow->id);

        return redirect()->route('qms.workflows.index')->with('success', 'Workflow created.');
    }

    public function show(Request $request, Workflow $workflow): View
    {
        $this->authorizeAbility($request, 'workflows.view');
        $this->authorizeOwner($request, $workflow);
        $workflow->load(['steps.serviceQueue', 'branch']);

        return view('qms.workflows.show', compact('workflow'));
    }

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

        return view('qms.workflows.edit', [
            'workflow' => $workflow->load('steps'),
            'branches' => Branch::owned($owner)->where('organization_id', $workflow->organization_id)->orderBy('name')->get(),
            'queues' => ServiceQueue::owned($owner)->where('organization_id', $workflow->organization_id)->orderBy('name')->get(),
        ]);
    }

    public function update(Request $request, Workflow $workflow): RedirectResponse
    {
        $this->authorizeAbility($request, 'workflows.manage');
        $this->authorizeOwner($request, $workflow);

        $validated = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'description' => ['nullable', 'string'],
            'branch_id' => ['nullable', 'exists:queue_branches,id'],
            'is_active' => ['boolean'],
            'steps' => ['required', 'array', 'min:1'],
            'steps.*.name' => ['required', 'string', 'max:255'],
            'steps.*.service_queue_id' => ['nullable', 'exists:queue_service_queues,id'],
        ]);

        $workflow->update([
            'name' => $validated['name'],
            'description' => $validated['description'] ?? null,
            'branch_id' => $validated['branch_id'] ?? null,
            'is_active' => $request->boolean('is_active', $workflow->is_active),
        ]);

        $workflow->steps()->delete();
        foreach ($validated['steps'] as $i => $step) {
            WorkflowStep::create([
                'workflow_id' => $workflow->id,
                'name' => $step['name'],
                'service_queue_id' => $step['service_queue_id'] ?? null,
                'sort_order' => $i + 1,
            ]);
        }

        AuditLogger::record($this->ownerRef($request), 'workflow.updated', $workflow->organization_id, $this->ownerRef($request), Workflow::class, $workflow->id);

        return redirect()->route('qms.workflows.show', $workflow)->with('success', 'Workflow updated.');
    }

    public function destroy(Request $request, Workflow $workflow): RedirectResponse
    {
        $this->authorizeAbility($request, 'workflows.manage');
        $this->authorizeOwner($request, $workflow);
        $workflow->delete();

        return redirect()->route('qms.workflows.index')->with('success', 'Workflow removed.');
    }
}