<?php

declare(strict_types=1);

namespace GuzzleHttp\UriTemplate\Tests;

use GuzzleHttp\UriTemplate\UriTemplate;
use PHPUnit\Framework\TestCase;

/**
 * @covers \GuzzleHttp\UriTemplate\UriTemplate
 */
final class UriTemplateTest extends TestCase
{
    public function templateProvider(): array
    {
        $variables = [
            'var'   => 'value',
            'hello' => 'Hello World!',
            'empty' => '',
            'path'  => '/foo/bar',
            'x'     => '1024',
            'y'     => 768,
            'null'  => null,
            'list'  => ['red', 'green', 'blue'],
            'keys'  => [
                "semi"  => ';',
                "dot"   => '.',
                "comma" => ','
            ],
            'empty_keys' => [],
        ];

        return \array_map(static function ($t) use ($variables) {
            $t[] = $variables;
            return $t;
        }, [
               ['foo',                 'foo'],
               ['{var}',               'value'],
               ['{hello}',             'Hello%20World%21'],
               ['{+var}',              'value'],
               ['{+hello}',            'Hello%20World!'],
               ['{+path}/here',        '/foo/bar/here'],
               ['here?ref={+path}',    'here?ref=/foo/bar'],
               ['X{#var}',             'X#value'],
               ['X{#hello}',           'X#Hello%20World!'],
               ['map?{x,y}',           'map?1024,768'],
               ['{x,hello,y}',         '1024,Hello%20World%21,768'],
               ['{+x,hello,y}',        '1024,Hello%20World!,768'],
               ['{+path,x}/here',      '/foo/bar,1024/here'],
               ['{#x,hello,y}',        '#1024,Hello%20World!,768'],
               ['{#path,x}/here',      '#/foo/bar,1024/here'],
               ['X{.var}',             'X.value'],
               ['X{.x,y}',             'X.1024.768'],
               ['{/var}',              '/value'],
               ['{/var,x}/here',       '/value/1024/here'],
               ['{;x,y}',              ';x=1024;y=768'],
               ['{;x,y,empty}',        ';x=1024;y=768;empty'],
               ['{?x,y}',              '?x=1024&y=768'],
               ['{?x,y,empty}',        '?x=1024&y=768&empty='],
               ['?fixed=yes{&x}',      '?fixed=yes&x=1024'],
               ['{&x,y,empty}',        '&x=1024&y=768&empty='],
               ['{var:3}',             'val'],
               ['{var:30}',            'value'],
               ['{list}',              'red,green,blue'],
               ['{list*}',             'red,green,blue'],
               ['{keys}',              'semi,%3B,dot,.,comma,%2C'],
               ['{keys*}',             'semi=%3B,dot=.,comma=%2C'],
               ['{+path:6}/here',      '/foo/b/here'],
               ['{+list}',             'red,green,blue'],
               ['{+list*}',            'red,green,blue'],
               ['{+keys}',             'semi,;,dot,.,comma,,'],
               ['{+keys*}',            'semi=;,dot=.,comma=,'],
               ['{#path:6}/here',      '#/foo/b/here'],
               ['{#list}',             '#red,green,blue'],
               ['{#list*}',            '#red,green,blue'],
               ['{#keys}',             '#semi,;,dot,.,comma,,'],
               ['{#keys*}',            '#semi=;,dot=.,comma=,'],
               ['X{.var:3}',           'X.val'],
               ['X{.list}',            'X.red,green,blue'],
               ['X{.list*}',           'X.red.green.blue'],
               ['X{.keys}',            'X.semi,%3B,dot,.,comma,%2C'],
               ['X{.keys*}',           'X.semi=%3B.dot=..comma=%2C'],
               ['{/var:1,var}',        '/v/value'],
               ['{/list}',             '/red,green,blue'],
               ['{/list*}',            '/red/green/blue'],
               ['{/list*,path:4}',     '/red/green/blue/%2Ffoo'],
               ['{/keys}',             '/semi,%3B,dot,.,comma,%2C'],
               ['{/keys*}',            '/semi=%3B/dot=./comma=%2C'],
               ['{;hello:5}',          ';hello=Hello'],
               ['{;list}',             ';list=red,green,blue'],
               ['{;list*}',            ';list=red;list=green;list=blue'],
               ['{;keys}',             ';keys=semi,%3B,dot,.,comma,%2C'],
               ['{;keys*}',            ';semi=%3B;dot=.;comma=%2C'],
               ['{?var:3}',            '?var=val'],
               ['{?list}',             '?list=red,green,blue'],
               ['{?list*}',            '?list=red&list=green&list=blue'],
               ['{?keys}',             '?keys=semi,%3B,dot,.,comma,%2C'],
               ['{?keys*}',            '?semi=%3B&dot=.&comma=%2C'],
               ['{&var:3}',            '&var=val'],
               ['{&list}',             '&list=red,green,blue'],
               ['{&list*}',            '&list=red&list=green&list=blue'],
               ['{&keys}',             '&keys=semi,%3B,dot,.,comma,%2C'],
               ['{&keys*}',            '&semi=%3B&dot=.&comma=%2C'],
               ['{.null}',            ''],
               ['{.null,var}',        '.value'],
               ['X{.empty_keys*}',     'X'],
               ['X{.empty_keys}',      'X'],
               // Test that missing expansions are skipped
               ['test{&missing*}',     'test'],
               // Test that multiple expansions can be set
               ['http://{var}/{var:2}{?keys*}', 'http://value/va?semi=%3B&dot=.&comma=%2C'],
               // Test more complex query string stuff
               ['http://www.test.com{+path}{?var,keys*}', 'http://www.test.com/foo/bar?var=value&semi=%3B&dot=.&comma=%2C']
           ]);
    }

    /**
     * @dataProvider templateProvider
     */
    public function testExpandsUriTemplates(string $template, string $expansion, array $variables): void
    {
        self::assertSame($expansion, UriTemplate::expand($template, $variables));
    }

    public function expressionProvider(): array
    {
        return [
            [
                '{+var*}', [
                'operator' => '+',
                'values'   => [
                    ['modifier' => '*', 'value' => 'var']
                ]
            ],
            ],
            [
                '{?keys,var,val}', [
                'operator' => '?',
                'values'   => [
                    ['value' => 'keys', 'modifier' => ''],
                    ['value' => 'var', 'modifier' => ''],
                    ['value' => 'val', 'modifier' => '']
                ]
            ],
            ],
            [
                '{+x,hello,y}', [
                'operator' => '+',
                'values'   => [
                    ['value' => 'x', 'modifier' => ''],
                    ['value' => 'hello', 'modifier' => ''],
                    ['value' => 'y', 'modifier' => '']
                ]
            ]
            ]
        ];
    }

    /**
     * @dataProvider expressionProvider
     */
    public function testParsesExpressions(string $exp, array $data): void
    {
        $template = new UriTemplate();

        // Access the config object
        $class = new \ReflectionClass($template);
        $method = $class->getMethod('parseExpression');
        $method->setAccessible(true);

        $exp = \substr($exp, 1, -1);
        self::assertSame($data, $method->invokeArgs($template, [$exp]));
    }

    /**
     * @ticket https://github.com/guzzle/guzzle/issues/90
     */
    public function testAllowsNestedArrayExpansion(): void
    {
        $result = UriTemplate::expand('http://example.com{+path}{/segments}{?query,data*,foo*}', [
            'path'     => '/foo/bar',
            'segments' => ['one', 'two'],
            'query'    => 'test',
            'data'     => [
                'more' => ['fun', 'ice cream']
            ],
            'foo' => [
                'baz' => [
                    'bar'  => 'fizz',
                    'test' => 'buzz'
                ],
                'bam' => 'boo'
            ]
        ]);

        self::assertSame('http://example.com/foo/bar/one,two?query=test&more%5B0%5D=fun&more%5B1%5D=ice%20cream&baz%5Bbar%5D=fizz&baz%5Btest%5D=buzz&bam=boo', $result);
    }

    public function specComplianceProvider(): \Generator
    {
        foreach (['spec-examples.json', 'spec-examples-by-section.json', 'extended-tests.json'] as $filename) {
            foreach (self::parseSpecExamples($filename) as $example) {
                yield $example;
            }
        }
    }

    /**
     * @dataProvider specComplianceProvider
     */
    public function testSpecCompliance(string $template, array $expansions, array $variables): void
    {
        self::assertContains(UriTemplate::expand($template, $variables), $expansions);
    }

    private static function parseSpecExamples(string $filename): \Generator
    {
        $examples = \file_get_contents(\sprintf('%s/../vendor/uri-template/tests/%s', __DIR__, $filename));

        foreach (\json_decode($examples, true) as $example) {
            $variables = $example['variables'];
            foreach ($example['testcases'] as $case) {
                yield [$case[0], (array) $case[1], $variables];
            }
        }
    }
}