<?php

namespace App\Controllers\View;

use App\Controllers\BaseController;
use App\Models\ConfigurationModel;
use App\Models\FinancialAidRequestModel;
use App\Models\StudentModel;

class ParentFinancialAidController extends BaseController
{
    public function index()
    {
        $parentId = (int) session()->get('user_id');
        if ($parentId <= 0) {
            return redirect()->to('/login');
        }

        $schoolYear = (string) ((new ConfigurationModel())->getConfig('school_year') ?? '');
        $model = new FinancialAidRequestModel();
        $requests = $model
            ->where('parent_id', $parentId)
            ->where('school_year', $schoolYear)
            ->orderBy('id', 'DESC')
            ->findAll();

        return view('parent/financial_aid', [
            'schoolYear' => $schoolYear,
            'requests' => $requests,
            'openRequest' => $model->openRequestForParent($parentId, $schoolYear),
            'existingRequest' => $model->requestForParentYear($parentId, $schoolYear),
        ]);
    }

    public function submit()
    {
        $parentId = (int) session()->get('user_id');
        if ($parentId <= 0) {
            return redirect()->to('/login');
        }

        $schoolYear = (string) ((new ConfigurationModel())->getConfig('school_year') ?? '');
        $model = new FinancialAidRequestModel();
        if ($model->requestForParentYear($parentId, $schoolYear) !== null) {
            return redirect()->back()->with('error', 'You can submit only one financial aid application per school year.');
        }

        $studentIds = array_map('intval', array_column(
            (new StudentModel())->select('id')->where('parent_id', $parentId)->findAll(),
            'id'
        ));
        if ($studentIds === []) {
            return redirect()->back()->withInput()->with('error', 'No students are linked to your account.');
        }

        $householdIncomeRaw = trim((string) $this->request->getPost('household_income'));
        if ($householdIncomeRaw === '' || ! is_numeric($householdIncomeRaw) || (float) $householdIncomeRaw < 0) {
            return redirect()->back()->withInput()->with('error', 'Enter your household income.');
        }

        $householdSize = (int) $this->request->getPost('household_size');
        if ($householdSize < 1) {
            return redirect()->back()->withInput()->with('error', 'Enter your household size.');
        }

        $requestedAmountRaw = trim((string) $this->request->getPost('requested_amount'));
        if ($requestedAmountRaw === '' || ! is_numeric($requestedAmountRaw) || (float) $requestedAmountRaw <= 0) {
            return redirect()->back()->withInput()->with('error', 'Enter the amount you are requesting.');
        }

        $needStatement = trim((string) $this->request->getPost('need_statement'));
        if ($needStatement === '') {
            return redirect()->back()->withInput()->with('error', 'Please describe why you are requesting financial aid.');
        }

        $model->insert([
            'parent_id' => $parentId,
            'school_year' => $schoolYear,
            'student_ids_json' => json_encode(array_values($studentIds)),
            'household_size' => $householdSize,
            'household_income' => round((float) $householdIncomeRaw, 2),
            'need_statement' => $needStatement,
            'requested_amount' => round((float) $requestedAmountRaw, 2),
            'status' => 'submitted',
        ]);

        return redirect()->to('/parent/financial-aid')->with('success', 'Your financial aid request was submitted.');
    }
}