<?php

namespace App\Controllers;

use App\Models\CategoryModel;
use App\Models\OperationModel;

class Operations extends BaseController
{
    private function model(): OperationModel
    {
        return model(OperationModel::class);
    }

    public function index()
    {
        $f = [
            'from'        => $this->request->getGet('from'),
            'to'          => $this->request->getGet('to'),
            'category_id' => $this->request->getGet('category_id'),
            'type'        => $this->request->getGet('type'),
        ];

        $perPage = 10;
        $total   = $this->model()->countFiltered($f);
        $pages   = max(1, (int) ceil($total / $perPage));
        $page    = min($pages, max(1, (int) $this->request->getGet('page')));

        return view('operations/index', [
            'title'      => 'Operacje',
            'operations' => $this->model()->filtered($f, $perPage, $page),
            'totals'     => $this->model()->totals($f),
            'categories' => model(CategoryModel::class)->tree(),
            'filter'     => $f,
            'page'       => $page,
            'pages'      => $pages,
            'total'      => $total,
        ]);
    }

    public function new()
    {
        return view('operations/form', [
            'title'      => 'Nowa operacja',
            'op'         => null,
            'categories' => model(CategoryModel::class)->tree(),
        ]);
    }

    public function create()
    {
        return $this->persist(null);
    }

    public function edit($id)
    {
        $op = $this->model()->find((int) $id);
        if (! $op) {
            return redirect()->to('/operations')->with('error', 'Nie znaleziono operacji.');
        }

        return view('operations/form', [
            'title'      => 'Edycja operacji',
            'op'         => $op,
            'categories' => model(CategoryModel::class)->tree(),
        ]);
    }

    public function update($id)
    {
        return $this->persist((int) $id);
    }

    public function delete($id)
    {
        $this->model()->delete((int) $id);

        return redirect()->to('/operations')->with('success', 'Operacja usunięta.');
    }

    private function persist(?int $id)
    {
        $categoryId = $this->request->getPost('category_id') ?: null;
        $type       = (string) $this->request->getPost('type');

        // Zrodlo prawdy dla typu: wybrana kategoria narzuca typ operacji.
        if ($categoryId !== null) {
            $cat = model(CategoryModel::class)->find((int) $categoryId);
            if ($cat) {
                $type = $cat['type'];
            }
        }

        $data = [
            'date'        => (string) $this->request->getPost('date'),
            'amount'      => (string) $this->request->getPost('amount'),
            'type'        => $type,
            'category_id' => $categoryId,
            'description' => trim((string) $this->request->getPost('description')) ?: null,
        ];

        $model = $this->model();
        $ok    = $id !== null ? $model->update($id, $data) : $model->insert($data);

        if ($ok === false) {
            return redirect()->back()->withInput()
                ->with('error', implode(' ', $model->errors()));
        }

        return redirect()->to('/operations')->with('success', 'Zapisano operację.');
    }
}