<?php

namespace App\Http\Controllers;

use App\Enums\PurchasingRole;
use App\Models\PurchaseAward;
use App\Models\QualificationAssessment;
use App\Models\QualificationSet;
use App\Models\Requisition;
use App\Models\User;
use App\Services\DocumentaryQualificationWorkflow;
use App\Services\ProposalOpeningWorkflow;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;
use Inertia\Inertia;
use Symfony\Component\HttpFoundation\Response;

class DocumentaryQualificationController extends Controller
{
    private function actor(Request $request): User
    {
        $actor = $request->user('web');
        abort_unless($actor instanceof User && $actor->hasFunctions([PurchasingRole::Admin, PurchasingRole::Procurement, PurchasingRole::Finance, PurchasingRole::DepartmentHead]), 403);

        return $actor;
    }

    private function access(Request $request, int $id): Requisition
    {
        abort_unless($this->actor($request)->hasFunctions([PurchasingRole::Admin, PurchasingRole::Procurement, PurchasingRole::Finance, PurchasingRole::DepartmentHead]), 403);

        return Requisition::query()->visibleTo($this->actor($request))->findOrFail($id);
    }

    public function show(Request $request, Requisition $requisition, ProposalOpeningWorkflow $opening): Response
    {
        $this->access($request, $requisition->id);
        $filters = $request->validate(['version' => 'nullable|integer|min:1']);
        $sets = QualificationSet::query()->where('requisition_id', $requisition->id)->latest('revision')->get(['id', 'revision', 'reason', 'created_at']);
        $latest = $sets->first() ? QualificationSet::query()->findOrFail($sets->first()->id) : null;
        $selected = isset($filters['version']) ? QualificationSet::query()->where('requisition_id', $requisition->id)->findOrFail((int) $filters['version']) : $latest;
        $focusInput = $request->validate(['quotation_id' => ['nullable', 'integer', 'min:1', Rule::exists('quotations', 'id')->where('tenant_id', $requisition->tenant_id)->where('requisition_id', $requisition->id), Rule::in(array_column($selected->snapshot['proposals'] ?? [], 'id'))]]);
        $focus = isset($focusInput['quotation_id']) ? (int) $focusInput['quotation_id'] : null;
        $proposals = $opening->proposals($requisition);
        $basis = $opening->basis($proposals);
        $workflow = app(DocumentaryQualificationWorkflow::class);
        $current = $selected !== null && $workflow->currentSet($requisition, $selected);
        $closed = $requisition->status !== 'approved' || PurchaseAward::query()->where('requisition_id', $requisition->id)->exists();
        $query = QualificationAssessment::query()->where('qualification_set_id', $selected->id ?? 0);
        $recordIds = (clone $query)->selectRaw('MAX(id)')->groupBy('quotation_id', 'analyst_id');
        $records = QualificationAssessment::query()->whereIn('id', $recordIds)->orderBy('quotation_id')->orderBy('analyst_id')->get();
        Inertia::encryptHistory();
        $response = Inertia::render('purchases/qualification', [
            'requisition' => $requisition->only(['id', 'number', 'justification']), 'sets' => $sets, 'selected' => $selected,
            'latestId' => $latest->id ?? 0, 'latestCriteria' => $latest->criteria ?? [], 'basisHash' => $basis, 'isCurrent' => (bool) $current,
            'proposals' => $proposals,
            'closedForChanges' => $closed,
            'records' => $records, 'history' => $query->latest('id')->paginate(20)->withQueryString(), 'actorId' => $this->actor($request)->id,
            'focusQuotationId' => $focus,
            'canDefine' => $workflow->canDefine($this->actor($request), $requisition),
            'canAssess' => $selected !== null && $workflow->canAssess($this->actor($request), $requisition, $selected),
        ])->toResponse($request);
        $response->headers->set('Cache-Control', 'private, no-store, max-age=0');

        return $response;
    }

    public function define(Request $request, Requisition $requisition, DocumentaryQualificationWorkflow $workflow): RedirectResponse
    {
        $this->access($request, $requisition->id);
        $data = $request->validate([
            'previous_id' => 'required|integer|min:0', 'basis_hash' => 'required|string|size:64', 'reason' => 'required|string|min:10|max:4000',
            'criteria' => 'required|array|min:1|max:30', 'criteria.*' => 'required|array:label,category,required',
            'criteria.*.label' => 'required|string|min:3|max:500', 'criteria.*.category' => 'required|in:legal,financial,fiscal,technical,administrative', 'criteria.*.required' => 'required|boolean',
            'snapshot' => 'prohibited', 'tenant_id' => 'prohibited', 'created_by' => 'prohibited',
        ]);
        $workflow->define($this->actor($request), $requisition, $data);

        return to_route('qualifications.show', $requisition);
    }

    public function assess(Request $request, QualificationSet $set, DocumentaryQualificationWorkflow $workflow): RedirectResponse
    {
        $this->access($request, $set->requisition_id);
        $data = $request->validate([
            'previous_id' => 'required|integer|min:0', 'quotation_id' => 'required|integer', 'reason' => 'required|string|min:10|max:4000',
            'answers' => 'required|array|min:1|max:30', 'answers.*' => 'required|array:criterion_id,result,evidence,reason',
            'answers.*.criterion_id' => 'required|integer|distinct', 'answers.*.result' => 'required|in:pending,met,not_met,not_applicable',
            'answers.*.evidence' => 'nullable|string|max:1000', 'answers.*.reason' => 'nullable|string|max:4000',
            'snapshot' => 'prohibited', 'analyst_id' => 'prohibited', 'tenant_id' => 'prohibited', 'revision' => 'prohibited',
        ]);
        $data['answers'] = array_map(fn ($answer) => [...$answer, 'criterion_id' => (int) $answer['criterion_id']], $data['answers']);
        $workflow->assess($this->actor($request), $set, $data);

        return to_route('qualifications.show', $set->requisition_id);
    }
}