package org.simantics.scl.compiler.tests.markdown;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.nio.charset.Charset;

import org.simantics.scl.compiler.markdown.internal.MarkdownParser;
import org.simantics.scl.compiler.markdown.nodes.Node;

public class RunMarkdownTests {
    
    public static int FAILED = 0;
    public static int SUCCEEDED = 1;
    public static int SKIPPED = 2;
    
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(
                new InputStreamReader(
                        RunMarkdownTests.class.getResourceAsStream("spec.txt"),
                        Charset.forName("UTF-8")));
        
        StringBuilder in = new StringBuilder();
        StringBuilder out = new StringBuilder();
        int state = 0;
        int testId = 0;
        int passed = 0;
        int failed = 0;
        int skipped = 0;
        while(true) {
            String line = reader.readLine();
            if(line == null)
                break;
            switch(state) {
            case 0:
                if(line.equals("```````````````````````````````` example"))
                    ++state;
                break;
            case 1:
                if(line.equals("."))
                    ++state;
                else {
                    if(in.length() > 0)
                        in.append('\n');
                    in.append(line);
                }
                break;
            case 2:
                if(line.equals("````````````````````````````````")) {
                    ++testId;
                    int status = test(testId, in.toString(), out.toString());
                    if(status == SUCCEEDED)
                        ++passed;
                    else if(status == FAILED)
                        ++failed;
                    else
                        ++skipped;
                    in = new StringBuilder();
                    out = new StringBuilder();
                    state = 0;
                }
                else {
                    if(out.length() > 0)
                        out.append('\n');
                    out.append(line);
                }
                break;
            }
        }
        
        System.out.println("Passed: " + passed + "/" + testId);
        System.out.println("Failed: " + failed + "/" + testId);
        System.out.println("Skipped: " + skipped + "/" + testId);
    }

    public static int test(int id, String in, String out) throws IOException {
        MarkdownParser parser = new MarkdownParser();
        Node node = parser.parseDocument(new StringReader(in.replace('\u2192', '\t')));
        
        String result = node.toHtml().replace('\t', '\u2192');
                
        boolean passed = result.equals(out);
        
        if(!passed) {
            System.out.println("Example " + id); // + (passed ? " passed" : " failed"));
            System.out.println("---- in --------------------------------------------------------------------");
            System.out.println(in);
            System.out.println("---- expected --------------------------------------------------------------");
            System.out.println(out);
            System.out.println("---- actual ----------------------------------------------------------------");
            System.out.println(result);
            System.out.println("----------------------------------------------------------------------------");
            System.out.println();
        }
            
        return passed ? SUCCEEDED : FAILED;
    }
    
}