<?php

namespace Tests\Unit;

use Tests\TestCase;
use App\Library\StringHelper;

class FindAndReplaceTest extends TestCase
{
    public function test_it_updates_single_matching_node()
    {
        $data = [
            'name' => 'Hello',
            'src' => 'old.png'
        ];

        $count = StringHelper::iterate($data, function (&$node) use (&$matches) {
            $matches = 0;
            if (($node['name'] ?? null) === 'Hello') {
                $node['src'] = 'new.png';
                $matches++;
            }
            return $matches;
        });

        $this->assertEquals('new.png', $data['src']);
    }

    public function test_it_updates_all_matching_nodes_across_nested_structure()
    {
        $data = [
            'name' => 'Root',
            'nodes' => [
                ['name' => 'Child1', 'src' => 'a.png'],
                ['name' => 'Child1', 'src' => 'b.png'],
            ],
            'meta' => [
                'info' => [
                    ['name' => 'Child1', 'src' => 'c.png']
                ]
            ]
        ];

        $count = 0;
        StringHelper::iterate($data, function (&$node) use (&$count) {
            if (($node['name'] ?? null) === 'Child1') {
                $node['src'] = 'updated.png';
                $count++;
            }
        });

        $this->assertSame(3, $count);
        $this->assertEquals('updated.png', $data['nodes'][0]['src']);
        $this->assertEquals('updated.png', $data['meta']['info'][0]['src']);
    }

    public function test_it_handles_deeply_nested_structure()
    {
        $data = [
            'a' => [
                'b' => [
                    'c' => [
                        'name' => 'Target',
                        'src' => 'old.png'
                    ]
                ]
            ]
        ];

        $count = 0;
        StringHelper::iterate($data, function (&$node) use (&$count) {
            if (($node['name'] ?? null) === 'Target') {
                $node['src'] = 'changed.png';
                $count++;
            }
        });

        $this->assertSame(1, $count);
        $this->assertEquals('changed.png', $data['a']['b']['c']['src']);
    }

    public function test_it_returns_zero_when_no_match_is_found()
    {
        $data = [
            'name' => 'Root',
            'nodes' => [
                ['name' => 'ChildX', 'src' => 'a.png']
            ]
        ];

        $count = 0;
        StringHelper::iterate($data, function (&$node) use (&$count) {
            if (($node['name'] ?? null) === 'Nonexistent') {
                $node['src'] = 'updated.png';
                $count++;
            }
        });

        $this->assertSame(0, $count);
        $this->assertEquals('a.png', $data['nodes'][0]['src']); // unchanged
    }

    public function test_it_works_with_mixed_assoc_and_numeric_arrays()
    {
        $data = [
            'items' => [
                ['name' => 'Match', 'src' => 'a.png'],
                ['other' => [['name' => 'Match', 'src' => 'b.png']]]
            ]
        ];

        $count = 0;
        StringHelper::iterate($data, function (&$node) use (&$count) {
            if (($node['name'] ?? null) === 'Match') {
                $node['flag'] = true;
                $count++;
            }
        });

        $this->assertSame(2, $count);
        $this->assertTrue($data['items'][0]['flag']);
        $this->assertTrue($data['items'][1]['other'][0]['flag']);
    }

    public function test_it_allows_closure_to_add_new_keys()
    {
        $data = ['name' => 'Target', 'src' => 'a.png'];

        $count = 0;
        StringHelper::iterate($data, function (&$node) use (&$count) {
            if (($node['name'] ?? null) === 'Target') {
                $node['new'] = 'added';
                $count++;
            }
        });

        $this->assertSame(1, $count);
        $this->assertEquals('added', $data['new']);
    }
}