var test = require('tape'); var path = require('path'); var parse = path.parse || require('path-parse'); var keys = require('object-keys');

var nodeModulesPaths = require('../lib/node-modules-paths');

var verifyDirs = function verifyDirs(t, start, dirs, moduleDirectories, paths) {

var moduleDirs = [].concat(moduleDirectories || 'node_modules');
if (paths) {
    for (var k = 0; k < paths.length; ++k) {
        moduleDirs.push(path.basename(paths[k]));
    }
}

var foundModuleDirs = {};
var uniqueDirs = {};
var parsedDirs = {};
for (var i = 0; i < dirs.length; ++i) {
    var parsed = parse(dirs[i]);
    if (!foundModuleDirs[parsed.base]) { foundModuleDirs[parsed.base] = 0; }
    foundModuleDirs[parsed.base] += 1;
    parsedDirs[parsed.dir] = true;
    uniqueDirs[dirs[i]] = true;
}
t.equal(keys(parsedDirs).length >= start.split(path.sep).length, true, 'there are >= dirs than "start" has');
var foundModuleDirNames = keys(foundModuleDirs);
t.deepEqual(foundModuleDirNames, moduleDirs, 'all desired module dirs were found');
t.equal(keys(uniqueDirs).length, dirs.length, 'all dirs provided were unique');

var counts = {};
for (var j = 0; j < foundModuleDirNames.length; ++j) {
    counts[foundModuleDirs[j]] = true;
}
t.equal(keys(counts).length, 1, 'all found module directories had the same count');

};

test('node-modules-paths', function (t) {

t.test('no options', function (t) {
    var start = path.join(__dirname, 'resolver');
    var dirs = nodeModulesPaths(start);

    verifyDirs(t, start, dirs);

    t.end();
});

t.test('empty options', function (t) {
    var start = path.join(__dirname, 'resolver');
    var dirs = nodeModulesPaths(start, {});

    verifyDirs(t, start, dirs);

    t.end();
});

t.test('with paths=array option', function (t) {
    var start = path.join(__dirname, 'resolver');
    var paths = ['a', 'b'];
    var dirs = nodeModulesPaths(start, { paths: paths });

    verifyDirs(t, start, dirs, null, paths);

    t.end();
});

t.test('with paths=function option', function (t) {
    var paths = function paths(request, absoluteStart, getNodeModulesDirs, opts) {
        return getNodeModulesDirs().concat(path.join(absoluteStart, 'not node modules', request));
    };

    var start = path.join(__dirname, 'resolver');
    var dirs = nodeModulesPaths(start, { paths: paths }, 'pkg');

    verifyDirs(t, start, dirs, null, [path.join(start, 'not node modules', 'pkg')]);

    t.end();
});

t.test('with paths=function skipping node modules resolution', function (t) {
    var paths = function paths(request, absoluteStart, getNodeModulesDirs, opts) {
        return [];
    };
    var start = path.join(__dirname, 'resolver');
    var dirs = nodeModulesPaths(start, { paths: paths });
    t.deepEqual(dirs, [], 'no node_modules was computed');
    t.end();
});

t.test('with moduleDirectory option', function (t) {
    var start = path.join(__dirname, 'resolver');
    var moduleDirectory = 'not node modules';
    var dirs = nodeModulesPaths(start, { moduleDirectory: moduleDirectory });

    verifyDirs(t, start, dirs, moduleDirectory);

    t.end();
});

t.test('with 1 moduleDirectory and paths options', function (t) {
    var start = path.join(__dirname, 'resolver');
    var paths = ['a', 'b'];
    var moduleDirectory = 'not node modules';
    var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectory });

    verifyDirs(t, start, dirs, moduleDirectory, paths);

    t.end();
});

t.test('with 1+ moduleDirectory and paths options', function (t) {
    var start = path.join(__dirname, 'resolver');
    var paths = ['a', 'b'];
    var moduleDirectories = ['not node modules', 'other modules'];
    var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectories });

    verifyDirs(t, start, dirs, moduleDirectories, paths);

    t.end();
});

t.test('combine paths correctly on Windows', function (t) {
    var start = 'C:\\Users\\username\\myProject\\src';
    var paths = [];
    var moduleDirectories = ['node_modules', start];
    var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectories });

    t.equal(dirs.indexOf(path.resolve(start)) > -1, true, 'should contain start dir');

    t.end();
});

t.test('combine paths correctly on non-Windows', { skip: process.platform === 'win32' }, function (t) {
    var start = '/Users/username/git/myProject/src';
    var paths = [];
    var moduleDirectories = ['node_modules', '/Users/username/git/myProject/src'];
    var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectories });

    t.equal(dirs.indexOf(path.resolve(start)) > -1, true, 'should contain start dir');

    t.end();
});

});