var fs = require('fs-extra');
var os = require('os');
var path = require("path");
var host = require("./Host");
var atomicRoot = host.atomicRoot;
var glob = require('glob');

var Tslint = require("tslint");

namespace('build', function() {

    // Linting task
    task('lint_typescript', {
        async: true
    }, function(fileMask, failOnError) {

        console.log("TSLINT: Linting files in " + fileMask);
        var lintConfig = JSON.parse(fs.readFileSync("./Script/tslint.json"));
        var options = {
            configuration: lintConfig,
            formatter: "prose"
        };

        // lint
        // Since TSLint does not yet support recursively searching for files, then we need to
        // create a command per file.  The main issue with this is that it will abort on the first error instead
        // of listing out all lint errors
        glob(fileMask, function(err, results) {
            var lintErrors = [];
            results.forEach(function(filename) {

                var contents = fs.readFileSync(filename, "utf8");

                var ll = new Tslint(filename, contents, options);
                var result = ll.lint();
                if (result.failureCount > 0) {
                    lintErrors.push(result.output);
                }
            });
            if (lintErrors.length > 0) {
                console.warn("TSLINT: WARNING - Lint errors detected");
                console.warn(lintErrors.join(''));
                if (failOnError) {
                    fail("TSLint errors detected");
                }
            }
            complete();
        });
    });

    // precreate script bindgs so they can be picked up by CMake
    task('precreateScriptBindings', {
        async: true
    }, function(platform, clean) {

        if (clean === undefined) {
            clean = true;
        }
        console.log("Precreating script bindings for platorm: " + platform);

        if (clean) {
            common.cleanCreateDir(common.getGenScriptRootDir(platform))
        }

        common.createGenScriptFiles(platform);

        complete();
    });

    function fileExists(filePath)
    {
        try
        {
            return fs.statSync(filePath).isFile();
        }
        catch (err)
        {
            return false;
        }
    }

    task('genscripts', {
        async: true
    }, function(platform, force) {

        if (force === undefined) {
            force = true;
        }

        var anyZero = false;
        if (!force) {

            var filenames = common.getGenScriptFilenames(platform);
            for (var i in filenames) {

                if (!fileExists(filenames[i]))
                {
                    console.log("genscripts: file missing, regenerating script bindings: " + filenames[i]);
                    anyZero = true;
                    break;
                }

                var stats = fs.statSync(filenames[i]);
                if (stats["size"] == 0) {
                    console.log("genscripts: file zero size, regenerating script bindings: " + filenames[i]);
                    anyZero = true;
                    break;
                }
            }

            if (!anyZero)
                return;
        }


        process.chdir(atomicRoot);

        var modules = host.getScriptModules(platform);
        var bindCmd = host.atomicTool + " bind \"" + atomicRoot + "\" ";
        var node;
        var tsc = "./Build/node_modules/typescript/lib/tsc";
        var tslint = "./Build/node_modules/tslint/lib/tslint-cli";
        var dtsGenerator = "./Build/node_modules/dts-generator/bin/dts-generator";

        switch(os.platform()) {
            case "win32":
            node = "Build\\Windows\\node\\node.exe";
            break;
            case "darwin":
            node = "Build/Mac/node/node";
            break;
            case "linux":
            node = "Build/Linux/node/node";
            break;
        }

        var cmds = [];
        for (var pkgName in modules) {
            cmds.push(bindCmd + "Script/Packages/" + pkgName + "/ " + platform);
        }

        if (node) {
            // compile
            cmds.push(node + " " + tsc + " -p ./Script");
            cmds.push(node + " " + tsc + " -p ./Script/AtomicWebViewEditor");

            // generate combined atomic.d.ts
            cmds.push(node + " " + dtsGenerator + " --name Atomic --project ./Script/TypeScript --out ./Script/TypeScript/dist/Atomic.d.ts");

            var lintTask = jake.Task['build:lint_typescript'];

            lintTask.addListener('complete', function () {
                console.log("\n\nLint: Typescript linting complete.\n\n");
                jake.exec(cmds, function() {

                    // copy some external dependencies into the editor modules directory
                    var editorModulesDir = "./Artifacts/Build/Resources/EditorData/AtomicEditor/EditorScripts/AtomicEditor/modules";
                    var webeditorModulesDir = "./Data/AtomicEditor/CodeEditor/source/editorCore/modules";
                    var nodeModulesDir = "./Build/node_modules";
                    fs.mkdirsSync(editorModulesDir);
                    // TypeScript
                    fs.copySync(nodeModulesDir + "/typescript/lib/typescript.js", webeditorModulesDir + "/typescript.js")

                    // copy lib.core.d.ts into the tool data directory
                    fs.mkdirsSync("./Artifacts/Build/Resources/EditorData/AtomicEditor/EditorScripts/AtomicEditor/TypeScriptSupport");
                    fs.copySync("./Build/node_modules/typescript/lib/lib.core.d.ts","./Data/AtomicEditor/TypeScriptSupport/lib.core.d.ts")

                    // copy the combined Atomic.d.ts to the tool data directory
                    fs.copySync("./Script/TypeScript/dist/Atomic.d.ts","./Data/AtomicEditor/TypeScriptSupport/Atomic.d.ts")

                    complete();

                }, {
                    printStdout: true
                });
            });

            lintTask.invoke("{./Script/AtomicEditor/**/*.ts,./Script/AtomicWebViewEditor/**/*.ts}", false);

        } else {
            throw new Error("Node not configured for this platform: " + os.platform());
        }


    });


}); // end of build namespace