import java.io.*;

import java.nio.file.*;

import java.util.*;

/**

* Generates markdown tables from parsed project entries and stats mappings.

*

* Usage: java step_4_generate_tables.java [parsed_projects_file] [stats_file] [output_file]

*/

void main(String[] args) throws IOException {

var projectsPath = args.length > 0 ? Path.of(args[0]) : Path.of(Constants.TMP_DIR + "/" + Constants.PARSED_PROJECTS_FILE);

var statsPath = args.length > 1 ? Path.of(args[1]) : Path.of(Constants.TMP_DIR + "/" + Constants.GITHUB_STATS_FILE);

var tmpDir = FileUtils.ensureTmpDirectory();

var outputPath = args.length > 2 ? Path.of(args[2]) : tmpDir.resolve(Constants.GENERATED_TABLES_FILE);

System.out.println("Step 4: Generating markdown tables...");

System.out.printf("Projects: %s%n", projectsPath.toAbsolutePath());

System.out.printf("Stats: %s%n", statsPath.toAbsolutePath());

System.out.printf("Output: %s%n", outputPath.toAbsolutePath());

FileUtils.validateInputFile(projectsPath);

FileUtils.validateInputFile(statsPath);

var projectEntries = readParsedEntries(projectsPath);

var statsMappings = readStatsMappings(statsPath);

var tables = generateMarkdownTables(projectEntries, statsMappings);

FileUtils.writeOutputFile(outputPath, tables);

System.out.println("SUCCESS: Successfully generated markdown tables!");

System.out.printf("Tables created: %d%n", countTables(tables));

System.out.printf("Total entries: %d%n", projectEntries.size());

}

/**

* Reads parsed entries.

*/

List<ProjectEntry> readParsedEntries(Path inputPath) throws IOException {

var content = FileUtils.readFileContent(inputPath);

var entries = new ArrayList<ProjectEntry>();

for (var section : content.split(Constants.SECTION_SEPARATOR)) {

if (section.isBlank()) {

continue;

}

String name = null, url = null, description = null, sectionName = null;

int linesToSkip = 0;

for (var line : section.lines().toArray(String[]::new)) {

if (line.startsWith(Constants.NAME_PREFIX)) {

name = line.substring(Constants.NAME_PREFIX.length());

} else if (line.startsWith(Constants.URL_PREFIX)) {

url = line.substring(Constants.URL_PREFIX.length());

} else if (line.startsWith(Constants.DESC_PREFIX)) {

description = line.substring(Constants.DESC_PREFIX.length());

} else if (line.startsWith(Constants.SKIP_PREFIX)) {

linesToSkip = Integer.parseInt(line.substring(Constants.SKIP_PREFIX.length()));

} else if (line.startsWith(Constants.SECTION_PREFIX)) {

sectionName = line.substring(Constants.SECTION_PREFIX.length());

}

}

if (name != null && url != null) {

entries.add(new ProjectEntry(

name,

url,

description != null ? description : "",

linesToSkip,

sectionName != null ? sectionName : ""

));

}

}

return entries;

}

/**

* Reads stats mappings.

*/

Map<String, StatsMapping> readStatsMappings(Path statsPath) throws IOException {

var content = FileUtils.readFileContent(statsPath);

var mappings = new HashMap<String, StatsMapping>();

for (var section : content.split("\n\n")) {

if (section.isBlank()) {

continue;

}

String repo = null, name = null, starsText = null, lastCommitText = null, licenseText = null;

for (var line : section.lines().toArray(String[]::new)) {

if (line.trim().isEmpty()) {

continue;

}

if (line.startsWith(Constants.REPO_PREFIX)) {

repo = line.substring(Constants.REPO_PREFIX.length());

} else if (line.startsWith(Constants.NAME_PREFIX)) {

name = line.substring(Constants.NAME_PREFIX.length());

} else if (line.startsWith(Constants.STARS_PREFIX)) {

starsText = line.substring(Constants.STARS_PREFIX.length());

} else if (line.startsWith(Constants.COMMIT_PREFIX)) {

lastCommitText = line.substring(Constants.COMMIT_PREFIX.length());

} else if (line.startsWith(Constants.LICENSE_PREFIX)) {

licenseText = line.substring(Constants.LICENSE_PREFIX.length());

}

}

if (repo != null && name != null) {

mappings.put(name, new StatsMapping(

name,

repo,

starsText,

lastCommitText,

licenseText

));

}

}

return mappings;

}

/**

* Generates markdown tables from project entries and stats mappings.

*/

String generateMarkdownTables(List<ProjectEntry> entries, Map<String, StatsMapping> statsMappings) {

var tables = new StringBuilder();

var current = new ArrayList<ProjectEntry>();

var currentSection = "";

for (var entry : entries) {

// Check if we're starting a new section

if (!currentSection.equals(entry.section())) {

// Finish current table if we have entries

if (!current.isEmpty()) {

tables.append(createMarkdownTable(current, statsMappings));

current.clear();

}

currentSection = entry.section();

}

current.add(entry);

}

// Finish any remaining entries

if (!current.isEmpty()) {

tables.append(createMarkdownTable(current, statsMappings));

}

return tables.toString();

}

/**

* Creates a single markdown table from project entries.

*/

String createMarkdownTable(List<ProjectEntry> entries, Map<String, StatsMapping> statsMappings) {

if (entries.isEmpty()) {

return "";

}

var sectionName = entries.get(0).section();

var table = new StringBuilder();

table.append(Constants.SECTION_COMMENT_PREFIX).append(sectionName).append(" -->\n\n");

table.append("| Name | Description | Stars | Updated |\n");

table.append("| :--- | :---------- | :---: | :-----: |\n");

for (var entry : entries) {

var desc = entry.description().isEmpty() ? Constants.NO_DESCRIPTION : entry.description();

var stats = statsMappings.get(entry.name());

var stars = stats != null ? stats.starsText() : Constants.NO_STATS;

var commit = stats != null ? stats.lastCommitText() : Constants.NO_STATS;

// Escape pipe characters in description for markdown

desc = desc.replace("|", "\\|");

table.append("| [").append(entry.name()).append("](").append(entry.url()).append(") | ");

table.append(desc).append(" | ");

table.append(stars).append(" | ");

table.append(commit).append(" |\n");

}

// Add single newline after table

table.append("\n");

return table.toString();

}

/**

* Counts the number of tables in the generated content.

*/

int countTables(String content) {

return (int) content.lines().filter(l -> l.startsWith("| Name |")).count();

}

/**

* Stats mapping for GitHub repository data.

*/

record StatsMapping(

String name,

String repo,

String starsText,

String lastCommitText,

String licenseText

) {}