import {Gulpclass, Task, SequenceTask} from "gulpclass/Decorators";

const gulp = require("gulp");
const del = require("del");
const shell = require("gulp-shell");
const replace = require("gulp-replace");
const mocha = require("gulp-mocha");
const chai = require("chai");
const tslint = require("gulp-tslint");
const stylish = require("tslint-stylish");

@Gulpclass()
export class Gulpfile {

    // -------------------------------------------------------------------------
    // General tasks
    // -------------------------------------------------------------------------

    /**
     * Cleans build folder.
     */
    @Task()
    clean(cb: Function) {
        return del(["./build/**"], cb);
    }

    /**
     * Runs typescript files compilation.
     */
    @Task()
    compile() {
        return gulp.src("*.js", { read: false })
            .pipe(shell(["tsc"]));
    }

    // -------------------------------------------------------------------------
    // Packaging and Publishing tasks
    // -------------------------------------------------------------------------

    /**
     * Publishes a package to npm from ./build/package directory.
     */
    @Task()
    npmPublish() {
        return gulp.src("*.js", { read: false })
            .pipe(shell([
                "cd ./build/package && npm publish"
            ]));
    }

    /**
     * Copies all files that will be in a package.
     */
    @Task()
    packageFiles() {
        return gulp.src("./build/es5/src/**/*")
            .pipe(gulp.dest("./build/package"));
    }

    /**
     * Change the "private" state of the packaged package.json file to public.
     */
    @Task()
    packagePreparePackageFile() {
        return gulp.src("./package.json")
            .pipe(replace("\"private\": true,", "\"private\": false,"))
            .pipe(gulp.dest("./build/package"));
    }

    /**
     * This task will replace all typescript code blocks in the README (since npm does not support typescript syntax
     * highlighting) and copy this README file into the package folder.
     */
    @Task()
    packageReadmeFile() {
        return gulp.src("./README.md")
            .pipe(replace(/```typescript([\s\S]*?)```/g, "```javascript$1```"))
            .pipe(gulp.dest("./build/package"));
    }

    /**
     * This task will copy typings.json file to the build package.
     */
    @Task()
    copyTypingsFile() {
        return gulp.src("./typings.json")
            .pipe(gulp.dest("./build/package"));
    }

    /**
     * Creates a package that can be published to npm.
     */
    @SequenceTask()
    package() {
        return [
            "clean",
            "compile",
            ["packageFiles", "packagePreparePackageFile", "packageReadmeFile", "copyTypingsFile"]
        ];
    }

    /**
     * Creates a package and publishes it to npm.
     */
    @SequenceTask()
    publish() {
        return ["package", "npmPublish"];
    }

    // -------------------------------------------------------------------------
    // Run tests tasks
    // -------------------------------------------------------------------------

    /**
     * Runs ts linting to validate source code.
     */
    @Task()
    tslint() {
        return gulp.src(["./src/**/*.ts", "./test/**/*.ts", "./sample/**/*.ts"])
            .pipe(tslint())
            .pipe(tslint.report(stylish, {
                emitError: true,
                sort: true,
                bell: true
            }));
    }

    /**
     * Runs integration tests.
     */
    @Task()
    integration() {
        chai.should();
        chai.use(require("sinon-chai"));
        chai.use(require("chai-as-promised"));
        return gulp.src("./build/es5/test/integration/**/*.js")
            .pipe(mocha());
    }

    /**
     * Runs functional tests.
     */
    @Task()
    functional() {
        chai.should();
        chai.use(require("sinon-chai"));
        chai.use(require("chai-as-promised"));
        return gulp.src("./build/es5/test/functional/**/*.js")
            .pipe(mocha());
    }

    /**
     * Runs unit-tests.
     */
    @Task()
    unit() {
        chai.should();
        chai.use(require("sinon-chai"));
        return gulp.src("./build/es5/test/unit/**/*.js")
            .pipe(mocha());
    }

    /**
     * Compiles the code and runs tests.
     */
    @SequenceTask()
    tests() {
        return ["compile", "tslint", "unit", "integration", "functional"];
    }

}