var expect = require('expect.js');
var path = require('path');
var fs = require('graceful-fs');
var path = require('path');
var rimraf = require('rimraf');
var mkdirp = require('mkdirp');
var Q = require('q');
var Logger = require('bower-logger');
var cmd = require('../../../lib/util/cmd');
var copy = require('../../../lib/util/copy');
var FsResolver = require('../../../lib/core/resolvers/FsResolver');
var defaultConfig = require('../../../lib/config');

describe('FsResolver', function () {
    var tempSource;
    var logger;
    var testPackage = path.resolve(__dirname, '../../assets/package-a');

    before(function (next) {
        logger = new Logger();
        // Checkout test package version 0.2.1 which has a bower.json
        // with ignores
        cmd('git', ['checkout', '0.2.1'], { cwd: testPackage })
        .then(next.bind(next, null), next);
    });

    afterEach(function (next) {
        logger.removeAllListeners();

        if (tempSource) {
            rimraf(tempSource, next);
            tempSource = null;
        } else {
            next();
        }
    });

    function create(decEndpoint, config) {
        if (typeof decEndpoint === 'string') {
            decEndpoint = { source: decEndpoint };
        }

        return new FsResolver(decEndpoint, config || defaultConfig, logger);
    }

    describe('.constructor', function () {
        it('should guess the name from the path', function () {
            var resolver = create(path.resolve('../../assets/package-zip.zip'));

            expect(resolver.getName()).to.equal('package-zip');
        });

        it('should make paths absolute and normalized', function () {
            var resolver;

            resolver = create(path.relative(process.cwd(), testPackage));
            expect(resolver.getSource()).to.equal(testPackage);

            resolver = create(testPackage + '/something/..');
            expect(resolver.getSource()).to.equal(testPackage);
        });

        it.skip('should use config.cwd for resolving relative paths');

        it('should error out if a target was specified', function (next) {
            var resolver;

            try {
                resolver = create({ source: testPackage, target: '0.0.1' });
            } catch (err) {
                expect(err).to.be.an(Error);
                expect(err.message).to.match(/can\'t resolve targets/i);
                expect(err.code).to.equal('ENORESTARGET');
                return next();
            }

            next(new Error('Should have thrown'));
        });
    });

    describe('.hasNew', function () {
        it('should resolve always to true (for now..)', function (next) {
            var resolver = create(testPackage);

            tempSource = path.resolve(__dirname, '../../tmp/tmp');
            mkdirp.sync(tempSource);
            fs.writeFileSync(path.join(tempSource, '.bower.json'), JSON.stringify({
                name: 'test'
            }));

            resolver.hasNew(tempSource)
            .then(function (hasNew) {
                expect(hasNew).to.be(true);
                next();
            })
            .done();
        });

        //it.skip('should be false if the file mtime hasn\'t changed');
        //it.skip('should be false if the directory mtime hasn\'t changed');
        //it.skip('should be true if the file mtime has changed');
        //it.skip('should be true if the directory mtime has changed');
        //it.skip('should ignore files specified to be ignored');
    });

    describe('.resolve', function () {
        // Function to assert that the main property of the
        // package meta of a canonical dir is set to the
        // expected value
        function assertMain(dir, singleFile) {
            return Q.nfcall(fs.readFile, path.join(dir, '.bower.json'))
            .then(function (contents) {
                var pkgMeta = JSON.parse(contents.toString());

                expect(pkgMeta.main).to.equal(singleFile);

                return pkgMeta;
            });
        }

        it('should copy the source directory contents', function (next) {
            var resolver = create(testPackage);

            resolver.resolve()
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'foo'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'bar'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'baz'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'README.md'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'more'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'more', 'more-foo'))).to.be(true);
                next();
            })
            .done();
        });

        it('should copy the source file, renaming it to index', function (next) {
            var resolver = create(path.join(testPackage, 'foo'));

            resolver.resolve()
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'index'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'foo'))).to.be(false);
                expect(fs.existsSync(path.join(dir, 'bar'))).to.be(false);
            })
            .then(function () {
                // Test with extension
                var resolver = create(path.join(testPackage, 'README.md'));
                return resolver.resolve();
            })
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'index.md'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'README.md'))).to.be(false);

                return assertMain(dir, 'index.md')
                .then(next.bind(next, null));
            })
            .done();
        });

        it('should rename to index if source is a folder with just one file in it', function (next) {
            var resolver;

            tempSource = path.resolve(__dirname, '../../tmp/tmp');

            mkdirp.sync(tempSource);
            resolver = create(tempSource);

            copy.copyFile(path.join(testPackage, 'foo'), path.join(tempSource, 'foo'))
            .then(resolver.resolve.bind(resolver))
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'index'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'foo'))).to.be(false);

                return assertMain(dir, 'index')
                .then(next.bind(next, null));
            })
            .done();
        });

        it('should not rename to index if source is a folder with just bower.json/component.json file in it', function (next) {
            var resolver;

            tempSource = path.resolve(__dirname, '../../tmp/tmp');

            mkdirp.sync(tempSource);
            resolver = create(tempSource);

            copy.copyFile(path.join(testPackage, 'bower.json'), path.join(tempSource, 'bower.json'))
            .then(resolver.resolve.bind(resolver))
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'bower.json'))).to.be(true);

                rimraf.sync(tempSource);
                mkdirp.sync(tempSource);

                resolver = create(tempSource);
            })
            .then(copy.copyFile.bind(copy, path.join(testPackage, 'bower.json'), path.join(tempSource, 'component.json')))
            .then(function () {
                return resolver.resolve();
            })
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'component.json'))).to.be(true);
                next();
            })
            .done();
        });

        it('should copy the source directory permissions', function (next) {
            var mode0777;
            var resolver;

            tempSource = path.resolve(__dirname, '../../assets/package-a-copy');
            resolver = create(tempSource);

            copy.copyDir(testPackage, tempSource)
            .then(function () {
                // Change tempSource dir to 0777
                fs.chmodSync(tempSource, 0777);
                // Get the mode to a variable
                mode0777 = fs.statSync(tempSource).mode;
            })
            .then(resolver.resolve.bind(resolver))
            .then(function (dir) {
                // Check if temporary dir is 0777 instead of default 0777 & ~process.umask()
                var stat = fs.statSync(dir);
                expect(stat.mode).to.equal(mode0777);
                next();
            })
            .done();
        });

        it('should copy the source file permissions', function (next) {
            var mode0777;
            var resolver;

            tempSource = path.resolve(__dirname, '../../tmp/temp-source');
            resolver = create(tempSource);

            copy.copyFile(path.join(testPackage, 'foo'), tempSource)
            .then(function () {
                // Change tempSource dir to 0777
                fs.chmodSync(tempSource, 0777);
                // Get the mode to a variable
                mode0777 = fs.statSync(tempSource).mode;
            })
            .then(resolver.resolve.bind(resolver))
            .then(function (dir) {
                // Check if file is 0777
                var stat = fs.statSync(path.join(dir, 'index'));
                expect(stat.mode).to.equal(mode0777);
                next();
            })
            .done();
        });

        it('should not copy ignored paths (to speed up copying)', function (next) {
            var resolver = create(testPackage);

            // Override the _applyPkgMeta function to prevent it from deleting ignored files
            resolver._applyPkgMeta = function () {
                return Q.resolve();
            };

            resolver.resolve()
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'foo'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'test'))).to.be(false);
                next();
            })
            .done();
        });

        it('should extract if source is an archive', function (next) {
            var resolver = create(path.resolve(__dirname, '../../assets/package-zip.zip'));

            resolver.resolve()
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'foo.js'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'bar.js'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'package-zip.zip'))).to.be(false);
                next();
            })
            .done();
        });

        it('should copy extracted folder contents if archive contains only a folder inside', function (next) {
            var resolver = create(path.resolve(__dirname, '../../assets/package-zip-folder.zip'));

            resolver.resolve()
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'foo.js'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'bar.js'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'package-zip'))).to.be(false);
                expect(fs.existsSync(path.join(dir, 'package-zip-folder'))).to.be(false);
                expect(fs.existsSync(path.join(dir, 'package-zip-folder.zip'))).to.be(false);
                next();
            })
            .done();
        });


        it('should extract if source is an archive and rename to index if it\'s only one file inside', function (next) {
            var resolver = create(path.resolve(__dirname, '../../assets/package-zip-single-file.zip'));

            resolver.resolve()
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'index.js'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'package-zip'))).to.be(false);
                expect(fs.existsSync(path.join(dir, 'package-zip-single-file'))).to.be(false);
                expect(fs.existsSync(path.join(dir, 'package-zip-single-file.zip'))).to.be(false);

                return assertMain(dir, 'index.js')
                .then(next.bind(next, null));
            })
            .done();
        });

        it('should rename single file from a single folder to index when source is an archive', function (next) {
            var resolver = create(path.resolve(__dirname, '../../assets/package-zip-folder-single-file.zip'));

            resolver.resolve()
            .then(function (dir) {
                expect(fs.existsSync(path.join(dir, 'index.js'))).to.be(true);
                expect(fs.existsSync(path.join(dir, 'package-zip'))).to.be(false);
                expect(fs.existsSync(path.join(dir, 'package-zip-folder-single-file'))).to.be(false);
                expect(fs.existsSync(path.join(dir, 'package-zip-folder-single-file.zip'))).to.be(false);

                return assertMain(dir, 'index.js')
                .then(next.bind(next, null));
            })
            .done();
        });
    });

    describe('#isTargetable', function () {
        it('should return false', function () {
            expect(FsResolver.isTargetable()).to.be(false);
        });
    });
});
