import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import com.github.difflib.text.DiffRow;
import com.github.difflib.text.DiffRowGenerator;

/**
 * Line text compare test
 * 
 * @author zhaohuihua
 * @version 20260316
 */
public class LineCompareTest {

    public static void main(String[] args) throws IOException {
        List<String> aTexts = Arrays.asList(
                "Chapter 1 Definitions",
                "Chapter 2 Risk Warnings and Explanations",
                "Chapter 3 Issuance Terms",
                "Chapter 4 Use of Raised Funds",
                "Chapter 5 Basic Information of Issuer",
                "Chapter 6 Financial Status of Issuer",
                "Chapter 7 Credit Status of Issuer",
                "Chapter 8 Credit Enhancement of Debt Financing Instruments",
                "Chapter 9 Tax Items",
                "Chapter 10 Active Debt Management"
        );
        List<String> bTexts = Arrays.asList(
                "Chapter 1 Definitions",
                "Chapter 2 Risk Warnings and Explanations",
                "Chapter 3 Issuance Terms",
                "Chapter 4 Basic Information of the Company",
                "Chapter 5 Financial Status of the Company",
                "Chapter 6 Credit Status of the Company",
                "Chapter 7 Credit Enhancement of Debt Financing Instruments",
                "Chapter 8 Holder Meeting Mechanism",
                "Chapter 9 Use of Raised Funds",
                "Chapter 10 Tax Items"
        );
        System.out.println("[aTexts] compare to [bTexts]:");
        textLineCompare(aTexts, bTexts);
//        System.out.println();
//        System.out.println();
//        System.out.println("[bTexts] compare to [aTexts]:");
//        textLineCompare(bTexts, aTexts);
    }
    
    private static void textLineCompare(List<String> oldTexts, List<String> newTexts) {
        DiffRowGenerator generator = DiffRowGenerator.create()
                .showInlineDiffs(true)
                .inlineDiffByWord(true)
                // .mergeOriginalRevised(true)
                // .reportLinesUnchanged(true)
                .oldTag((tag, f) -> f ? "<old>" : "</old>")
                .newTag((tag, f) -> f ? "<new>" : "</new>")
                .build();

        List<DiffRow> rows = generator.generateDiffRows(oldTexts, newTexts);

        System.out.println("------------------------------------------------------------");
        int li = 0, ri = 0;
        for (DiffRow row : rows) {
            String left = row.getOldLine();
            String right = row.getNewLine();
            if (row.getTag() == DiffRow.Tag.EQUAL) {
                li++;
                ri++;
                System.out.printf("%-6s %4s %4s    %s\n", row.getTag(), li, ri, left);
            } else if (row.getTag() == DiffRow.Tag.INSERT) {
                ri++;
                System.out.printf("%-6s      %4s    %s\n", row.getTag(), ri, right);
            } else if (row.getTag() == DiffRow.Tag.DELETE) {
                li++;
                System.out.printf("%-6s %4s         %s\n", row.getTag(), li, left);
            } else {
                li++;
                ri++;
                System.out.printf("%-6s %4s         %s\n", row.getTag(), li, left);
                System.out.printf("%16s    %s\n", ri, right);
            }
            System.out.println("------------------------------------------------------------");
        }
    }
}