<?php
/**
 * @filename StringReaderTest.php
 * @author Jerry Yan <792602257@qq.com>
 * @date 2020/12/18 12:19
 */

namespace JerryYan\DSL\Test\Reader;

use JerryYan\DSL\Reader\ReaderInterface;
use JerryYan\DSL\Reader\StringReader;
use PHPUnit\Framework\TestCase;

class StringReaderTest extends TestCase
{
    /** @var ReaderInterface[]  */
    protected $readerArray = [];
    protected $things = [
        [
            'original' => " Ahhh  This Is 一个 新的 TOken",
            'tokens' => ["Ahhh", "This", "Is", "一个", "新的", "TOken"],
            'nextTokens' => ["This", "Is", "一个", "新的", "TOken", ""],
            'positions' => [1, 7, 12, 15, 18, 21],
            'lines' => [1, 1, 1, 1, 1, 1],
            'linePositions' => [1, 7, 12, 15, 18, 21],
            'moveToNextLines' => [],
        ],
        [
            'original' => " 中文 \r\n\r 这是 \r Is A \n\n 一个 新的 TOken",
            'tokens' => ["中文", "这是", "Is", "A", "一个", "新的", "TOken"],
            'nextTokens' => ["这是", "Is", "A", "一个", "新的", "TOken", ""],
            'positions' => [1, 8, 13, 16, 21, 24, 27],
            'lines' => [1, 3, 4, 4, 6, 6, 6],
            'linePositions' => [1, 1, 1, 4, 1, 4, 7],
            'moveToNextLines' => [1, 2, 4],
        ]
    ];

    protected function setUp(): void
    {
        foreach ($this->things as $thing) {
            $this->readerArray[] = new StringReader($thing['original']);
        }
    }

    public function testGetNextChar()
    {
        foreach ($this->things as $index=>$thing) {
            $reader = $this->readerArray[$index];
            $reader->reset();
            $this->assertEquals(mb_substr(trim($thing['original']), 0, 1), $reader->getNextChar(), "不匹配");
            $this->assertEquals($thing['positions'][0], $reader->getCurrentPosition(), "CurPos与预计不符");
        }
    }

    public function testGetCurrentToken()
    {
        foreach ($this->things as $index=>$thing) {
            $reader = $this->readerArray[$index];
            $reader->reset();
            $this->assertEquals($thing['positions'][0], $reader->getCurrentPosition(), "CurPos与预计不符");
            $this->assertEquals($thing['tokens'][0], $reader->getCurrentToken(), "不匹配");
        }
    }

    /**
     * 移动至下一个Token
     * @author Jerry Yan <792602257@qq.com>
     * @date 2020/12/18 14:16
     * @depends testGetNextChar
     * @depends testGetCurrentToken
     * @depends testGetNextToken
     */
    public function testMoveToNextToken()
    {
        foreach ($this->things as $index=>$thing) {
            $reader = $this->readerArray[$index];
            $reader->reset();
            foreach ($thing['nextTokens'] as $key=> $nextToken){
                $oldCurToken = $reader->getCurrentToken();
                $oldNextPos = $reader->getNextPosition();
                $oldNextToken = $reader->getNextToken();
                $this->assertEquals($nextToken, $oldNextToken, "不匹配");
                $this->assertEquals($thing['positions'][$key], $reader->getCurrentPosition(), "CurPos与预计不符");
                $this->assertEquals($thing['lines'][$key], $reader->getCurrentLine(), "CurLine与预计不符");
                $this->assertEquals($thing['linePositions'][$key], $reader->getCurrentLinePosition(), "CLPos与预计不符");
                $hasNext = $reader->moveToNextToken();
                if ($hasNext) {
                    $this->assertNotEquals($oldCurToken, $reader->getCurrentToken(), "CurToken与旧CurToken相同");
                    $this->assertNotEquals($oldNextPos, $reader->getNextPosition(), "NextPos与旧NextPos相同");
                    $this->assertNotEquals($reader->getNextPosition(), $reader->getCurrentPosition(), "CurPos与NextPos相同");
                }
            }
        }
    }

    /**
     * 获取下一个Token，重复调用均为同一结果
     * @author Jerry Yan <792602257@qq.com>
     * @date 2020/12/18 18:49
     */
    public function testGetNextToken()
    {
        foreach ($this->things as $index=>$thing) {
            $reader = $this->readerArray[$index];
            $reader->reset();
            $nextPos = $reader->getNextPosition();
            $string = $reader->getNextToken();
            $this->assertEquals($string, $reader->getNextToken(), "不匹配");
            $this->assertEquals($reader->getNextToken(), $reader->getNextToken(), "不匹配");
            $this->assertEquals($nextPos, $reader->getNextPosition(), "NextPos不可以发生变化");
        }
    }

    public function testSkipCurrentLine()
    {
        foreach ($this->things as $index=>$thing) {
            $reader = $this->readerArray[$index];
            $reader->reset();
            foreach ($thing['moveToNextLines'] as $key){
                $reader->skipCurrentLine();
                $this->assertEquals($thing['lines'][$key], $reader->getCurrentLine(), "行号不匹配");
                $this->assertEquals($thing['linePositions'][$key], $reader->getCurrentLinePosition(), "CLPos不匹配");
                $this->assertEquals($thing['tokens'][$key], $reader->getCurrentToken(), "Token不匹配");
                $this->assertEquals($thing['positions'][$key], $reader->getCurrentPosition(), "CurPos不匹配");
                $this->assertEquals($thing['nextTokens'][$key], $reader->getNextToken(), "NextToken不匹配");
            }
        }
    }

    public function testResetCursor()
    {
        foreach ($this->things as $index=>$thing) {
            $reader = $this->readerArray[$index];
            $reader->moveToNextToken();
            $curPos = $reader->getCurrentPosition();
            $nextPos = $reader->getNextPosition();
            $string = $reader->getCurrentToken();
            $reader->resetCursor();
            $this->assertNotEquals($curPos, $reader->getCurrentPosition(), "CurPos未发生变化");
            $this->assertNotEquals($nextPos, $reader->getNextPosition(), "NextPos未发生变化");
            $this->assertNotEquals($string, $reader->getCurrentToken(), "CurToken未发生变化");
        }
    }
}