<?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\StringReader;
use PHPUnit\Framework\TestCase;

class StringReaderTest extends TestCase
{
    protected $readerWithCrLf;
    protected $reader;
    protected $things;
    protected $thingsWithCrLf;

    protected function setUp(): void
    {
        $this->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' => [],
        ];
        $this->thingsWithCrLf = [
            '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],
        ];
        $this->reader = new StringReader($this->things['original']);
        $this->readerWithCrLf = new StringReader($this->thingsWithCrLf['original']);
    }

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

    public function testGetCurrentToken()
    {
        $this->reader->reset();
        $this->assertEquals($this->things['positions'][0], $this->reader->getCurrentPosition(), "CurPos与预计不符");
        $this->assertEquals($this->things['tokens'][0], $this->reader->getCurrentToken(), "不匹配");
        $this->readerWithCrLf->reset();
        $this->assertEquals($this->thingsWithCrLf['positions'][0], $this->readerWithCrLf->getCurrentPosition(), "CurPos与预计不符");
        $this->assertEquals($this->thingsWithCrLf['tokens'][0], $this->readerWithCrLf->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()
    {
        $this->reader->reset();
        foreach ($this->things['nextTokens'] as $key=> $nextToken){
            $oldCurToken = $this->reader->getCurrentToken();
            $oldNextPos = $this->reader->getNextPosition();
            $oldNextToken = $this->reader->getNextToken();
            $this->assertEquals($nextToken, $oldNextToken, "不匹配");
            $this->assertEquals($this->things['positions'][$key], $this->reader->getCurrentPosition(), "CurPos与预计不符");
            $this->assertEquals($this->things['lines'][$key], $this->reader->getCurrentLine(), "CurLine与预计不符");
            $this->assertEquals($this->things['linePositions'][$key], $this->reader->getCurrentLinePosition(), "CLPos与预计不符");
            $hasNext = $this->reader->moveToNextToken();
            if ($hasNext) {
                $this->assertNotEquals($oldCurToken, $this->reader->getCurrentToken(), "CurToken与旧CurToken相同");
                $this->assertNotEquals($oldNextPos, $this->reader->getNextPosition(), "NextPos与旧NextPos相同");
                $this->assertNotEquals($this->reader->getNextPosition(), $this->reader->getCurrentPosition(), "CurPos与NextPos相同");
            }
        }
        // Cr/LF Support
        $this->readerWithCrLf->reset();
        foreach ($this->thingsWithCrLf['nextTokens'] as $key=> $nextToken){
            $oldCurToken = $this->readerWithCrLf->getCurrentToken();
            $oldNextPos = $this->readerWithCrLf->getNextPosition();
            $oldNextToken = $this->readerWithCrLf->getNextToken();
            $this->assertEquals($nextToken, $oldNextToken, "不匹配");
            $this->assertEquals($this->thingsWithCrLf['positions'][$key], $this->readerWithCrLf->getCurrentPosition(), "CurPos与预计不符");
            $this->assertEquals($this->thingsWithCrLf['lines'][$key], $this->readerWithCrLf->getCurrentLine(), "CurLine与预计不符");
            $this->assertEquals($this->thingsWithCrLf['linePositions'][$key], $this->readerWithCrLf->getCurrentLinePosition(), "CLPos与预计不符");
            $hasNext = $this->readerWithCrLf->moveToNextToken();
            if ($hasNext) {
                $this->assertNotEquals($oldCurToken, $this->readerWithCrLf->getCurrentToken(), "CurToken与旧CurToken相同");
                $this->assertNotEquals($oldNextPos, $this->readerWithCrLf->getNextPosition(), "NextPos与旧NextPos相同");
                $this->assertNotEquals($this->readerWithCrLf->getNextPosition(), $this->readerWithCrLf->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()
    {
        $this->reader->reset();
        $nextPos = $this->reader->getNextPosition();
        $string = $this->reader->getNextToken();
        $this->assertEquals($string, $this->reader->getNextToken(), "不匹配");
        $this->assertEquals($this->reader->getNextToken(), $this->reader->getNextToken(), "不匹配");
        $this->assertEquals($nextPos, $this->reader->getNextPosition(), "NextPos不可以发生变化");
    }

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

    public function testResetCursor()
    {
        $this->readerWithCrLf->moveToNextToken();
        $curPos = $this->readerWithCrLf->getCurrentPosition();
        $nextPos = $this->readerWithCrLf->getNextPosition();
        $curLine = $this->readerWithCrLf->getCurrentLine();
        $string = $this->readerWithCrLf->getCurrentToken();
        $this->readerWithCrLf->resetCursor();
        $this->assertNotEquals($curPos, $this->readerWithCrLf->getCurrentPosition(), "CurPos未发生变化");
        $this->assertNotEquals($nextPos, $this->readerWithCrLf->getNextPosition(), "NextPos未发生变化");
        $this->assertNotEquals($curLine, $this->readerWithCrLf->getCurrentLine(), "CurLine未发生变化");
        $this->assertNotEquals($string, $this->readerWithCrLf->getCurrentToken(), "CurToken未发生变化");
    }
}