<?php

namespace App\Controllers\Administrator;

use App\Controllers\BaseController;
use Throwable;

class WithdrawalFinancialController extends BaseController
{
    public function review(int $enrollmentId)
    {
        try {
            $calculation = service('withdrawalFinancial')->latestForEnrollment($enrollmentId);
            if ($calculation === null || ($calculation['status'] ?? '') === 'superseded') {
                $calculation = service('withdrawalFinancial')->preview($enrollmentId, $this->userId());
            } elseif ($this->hasStaleInstructionalWeeksBlocker($calculation)) {
                $calculation = service('withdrawalFinancial')->preview($enrollmentId, $this->userId());
            }

            return view('withdrawals/review', [
                'calculation' => $this->withPostingGateBlockers($calculation),
            ]);
        } catch (Throwable $e) {
            return redirect()->back()->with('error', $e->getMessage());
        }
    }

    public function recalculate(int $enrollmentId)
    {
        try {
            $calculation = service('withdrawalFinancial')->preview($enrollmentId, $this->userId(), [
                'enrollment_date' => (string) $this->request->getPost('enrollment_date'),
                'withdrawal_request_date' => (string) $this->request->getPost('withdrawal_request_date'),
                'override_reason' => (string) $this->request->getPost('override_reason'),
                'legacy_invoice_confirmed' => (string) $this->request->getPost('legacy_invoice_confirmed') === '1',
            ]);

            return redirect()->to('/administrator/withdrawals/' . $enrollmentId . '/review')
                ->with('success', 'Calculation preview version ' . (int) $calculation['version'] . ' saved.');
        } catch (Throwable $e) {
            return redirect()->back()->withInput()->with('error', $e->getMessage());
        }
    }

    public function confirm(int $calculationId)
    {
        try {
            $calculation = service('withdrawalFinancial')->post($calculationId, $this->userId());

            return redirect()->to('/administrator/withdrawal-calculations/' . $calculationId)
                ->with('success', ((int) ($calculation['new_refund_request_cents'] ?? 0)) > 0
                    ? 'Withdrawal posted and the refund request was created.'
                    : 'Withdrawal posted. No refund is due; the invoice balance was recalculated.');
        } catch (Throwable $e) {
            return redirect()->back()->with('error', $e->getMessage());
        }
    }

    public function calculation(int $calculationId)
    {
        try {
            $calculation = service('withdrawalFinancial')->details($calculationId);
            if ($this->hasStaleInstructionalWeeksBlocker($calculation)) {
                $calculation = service('withdrawalFinancial')->preview((int) $calculation['enrollment_id'], $this->userId());

                return redirect()->to('/administrator/withdrawal-calculations/' . (int) $calculation['id'])
                    ->with('success', 'Calculation preview refreshed with the configured total instructional weeks.');
            }

            return view('withdrawals/calculation', [
                'calculation' => $calculation,
            ]);
        } catch (Throwable $e) {
            return redirect()->back()->with('error', $e->getMessage());
        }
    }

    public function invoiceSummary(int $invoiceId)
    {
        try {
            return view('withdrawals/invoice_summary', [
                'calculations' => service('withdrawalFinancial')->calculationsForInvoice($invoiceId),
                'invoiceId' => $invoiceId,
            ]);
        } catch (Throwable $e) {
            return redirect()->back()->with('error', $e->getMessage());
        }
    }

    private function hasStaleInstructionalWeeksBlocker(array $calculation): bool
    {
        if (($calculation['status'] ?? '') !== 'requires_review' || ! empty($calculation['posted_at'])) {
            return false;
        }

        $blockers = array_map('strval', (array) ($calculation['blockers'] ?? []));

        return in_array('Set a positive total_instructional_weeks value for this school year.', $blockers, true)
            || in_array('Set a positive total_instructional_weeks value in configuration.', $blockers, true);
    }

    /** @return array<string,mixed> */
    private function withPostingGateBlockers(array $calculation): array
    {
        $blockers = array_values(array_filter(array_map('strval', (array) ($calculation['blockers'] ?? []))));
        foreach (service('withdrawalFinancial')->postingGateBlockers($calculation) as $blocker) {
            if (! in_array($blocker, $blockers, true)) {
                $blockers[] = $blocker;
            }
        }

        $calculation['blockers'] = $blockers;
        if (isset($calculation['explanation']) && is_array($calculation['explanation'])) {
            $calculation['explanation']['blockers'] = $blockers;
        }

        return $calculation;
    }

    private function userId(): ?int
    {
        $id = session()->get('user_id');

        return $id === null || $id === '' ? null : (int) $id;
    }
}