<?php

namespace App\Http\Controllers;

use App\Enums\PurchasingRole;
use App\Models\AwardCancellation;
use App\Models\PurchaseAward;
use App\Models\PurchaseControlPolicy;
use App\Models\PurchaseControlReview;
use App\Models\PurchaseOrder;
use App\Models\PurchaseRevision;
use App\Models\Requisition;
use App\Services\PurchaseControlPolicyWorkflow;
use App\Services\PurchaseRevisionWorkflow;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Inertia\Inertia;
use Inertia\Response;

class PurchaseControlController extends Controller
{
    public function index(Request $request): Response
    {
        $user = $request->user();
        $operational = in_array($user->purchasing_role, [PurchasingRole::Admin, PurchasingRole::Procurement, PurchasingRole::Finance]);
        $sources = Requisition::query()->where('requester_id', $user->id)->select('id');
        $ownAwards = PurchaseAward::query()->whereIn('requisition_id', $sources)->select('id');
        $cancellations = AwardCancellation::query()->whereIn('purchase_award_id', $ownAwards)->where('status', 'approved')->get(['id', 'purchase_award_id']);

        return Inertia::render('purchase-controls/index', [
            'role' => $user->purchasing_role->value, 'actorId' => $user->id,
            'policies' => $operational ? PurchaseControlPolicy::query()->latest('revision')->get() : [],
            'reviews' => $operational ? PurchaseControlReview::query()->get() : [],
            'awards' => $operational ? PurchaseAward::query()->whereNotIn('requisition_id', PurchaseOrder::query()->select('requisition_id'))->latest('id')->get(['id', 'requisition_id', 'status']) : [],
            'cancellations' => $operational ? AwardCancellation::query()->get(['id', 'purchase_award_id', 'created_by', 'status', 'reason', 'review_reason']) : [],
            'sources' => $cancellations->map(function (AwardCancellation $cancellation) {
                $award = PurchaseAward::query()->findOrFail($cancellation->purchase_award_id);
                $source = Requisition::query()->findOrFail($award->requisition_id);

                return ['id' => $cancellation->id, 'number' => $source->number, 'revision_id' => PurchaseRevision::query()->where('award_cancellation_id', $cancellation->id)->value('requisition_id')];
            }),
        ]);
    }

    public function propose(Request $request, PurchaseControlPolicyWorkflow $workflow): RedirectResponse
    {
        abort_unless($request->user()->purchasing_role === PurchasingRole::Admin, 403);
        $data = $request->validate(['previous_id' => 'required|integer|min:0', 'mode' => 'required|in:unissued_award', 'enabled' => 'required|boolean', 'valid_from' => 'required|date_format:Y-m-d', 'valid_until' => 'required|date_format:Y-m-d|after_or_equal:valid_from', 'reason' => 'required|string|min:10|max:4000']);
        $workflow->propose($request->user(), $data);

        return back();
    }

    public function policyReview(Request $request, PurchaseControlPolicy $policy, PurchaseControlPolicyWorkflow $workflow): RedirectResponse
    {
        $data = $request->validate(['decision' => 'required|in:approved,rejected', 'reason' => 'required|string|min:10|max:4000']);
        $workflow->review($request->user(), $policy, $data['decision'], $data['reason']);

        return back();
    }

    public function cancel(Request $request, PurchaseAward $award, PurchaseRevisionWorkflow $workflow): RedirectResponse
    {
        $data = $request->validate(['reason' => 'required|string|min:10|max:4000']);
        $workflow->request($request->user(), $award, $data['reason']);

        return back();
    }

    public function review(Request $request, AwardCancellation $cancellation, PurchaseRevisionWorkflow $workflow): RedirectResponse
    {
        $data = $request->validate(['decision' => 'required|in:approved,rejected', 'reason' => 'required|string|min:10|max:4000']);
        $workflow->review($request->user(), $cancellation, $data['decision'], $data['reason']);

        return back();
    }

    public function revise(Request $request, AwardCancellation $cancellation, PurchaseRevisionWorkflow $workflow): RedirectResponse
    {
        $data = $request->validate(['needed_by' => 'required|date_format:Y-m-d|after_or_equal:today', 'justification' => 'required|string|min:10|max:4000']);
        $revision = $workflow->revise($request->user(), $cancellation, $data['needed_by'], $data['justification']);

        return to_route('requisitions.edit', $revision);
    }
}