"use strict";

const fs = require('fs');
const async = require('async');
const glob = require('glob');

const autoGeneratedMarker = 
	"//------------------------------------------------------------------------------" + "\n" +
	"// <auto-generated>";

module.exports = (params, processor) => ({
	process: () => {
		if (processor.context.dotnetcheckerDone) {
			return processor.done();
		}

		processor.context.dotnetcheckerDone = true;

		glob("**/*.cs", {cwd: processor.context.exported}, (err, files) => {
			if (err) {
				processor.onError(err);
				return processor.done();
			}

			processor.onInfo("Found " + files.length + " .cs files");

			if (!files || !files.length) {
				processor.onWarn("No .cs files found");
				return processor.done();
			}

			return async.parallel(files.map((file) => (callback) => fs.readFile(processor.context.exported + "/" + file, { encoding: "utf8" }, (err, data) => {
				if (err) {
					processor.onError("Unable to check file " + file + ": " + err);
					return callback(err);
				}
				if (data.indexOf("\r\n") >= 0) {
					processor.onError("Windows-style EOL (0D0A) found in file " + file);
					return callback();
				}
				if (params.ignoreCodeStyle) {
					return callback();
				}
				if (data.substr(1, autoGeneratedMarker.length) === autoGeneratedMarker || data.substr(0, autoGeneratedMarker.length) === autoGeneratedMarker) {
					processor.onInfo("Skipping auto-generated file " + file);
					return callback();
				}

				if (data.indexOf("\t") >= 0 && data.indexOf("    ") >= 0) {
					processor.onError("Both tabs and spaces found in file " + file);
				}

				if (data.indexOf("\t") >= 0) {
					processor.onError("Tabs found in file " + file);
				}

				processor.onInfo("Checked file " + file);
				callback();
			})), processor.done.bind(processor));
		});
	}
});