/**
 * 'json' test suite
 *
 * Usage:
 *      nodeunit test.js
 *
 * Can limit the tests with the 'TEST_ONLY' environment variable: a
 * space-separated lists of dir names to which to limit. E.g.:
 *      TEST_ONLY=hello-server nodeunit test.js
 * Can also prefix with a '-' to *exclude* that test. E.g.: to run all but
 * the 'irc' test:
 *      TEST_ONLY='-irc' nodeunit test.js
 */

var path = require('path');
var exec = require('child_process').exec;
var fs = require('fs');
var testCase = require('nodeunit').testCase;
var ansidiff = require('ansidiff');
var warn = console.warn;



//---- test cases

var data = {
    //setUp: function (callback) {
    //  ...
    //},

    parseLookup: function (test) {
        var parseLookup = require('../lib/json.js').parseLookup;
        test.deepEqual(parseLookup('42'), [42]);
        test.deepEqual(parseLookup('a'), ['a']);
        test.deepEqual(parseLookup('a.b'), ['a', 'b']);
        test.deepEqual(parseLookup('a.b.c'), ['a', 'b', 'c']);

        test.deepEqual(parseLookup('[42]'), [42]);
        test.deepEqual(parseLookup('["a"]'), ['a']);
        test.deepEqual(parseLookup('["a"]'), ['a']);

        test.deepEqual(parseLookup('b[42]'), ['b', 42]);
        test.deepEqual(parseLookup('b["a"]'), ['b', 'a']);
        test.deepEqual(parseLookup('b["a"]'), ['b', 'a']);

        test.deepEqual(parseLookup('[42].b'), [42, 'b']);
        test.deepEqual(parseLookup('["a"].b'), ['a', 'b']);
        test.deepEqual(parseLookup('["a"].b'), ['a', 'b']);

        test.deepEqual(parseLookup('["a-b"]'), ['a-b']);
        test.deepEqual(parseLookup('["a-b"]'), ['a-b']);
        test.deepEqual(parseLookup('["a.b"]'), ['a.b']);
        test.deepEqual(parseLookup('["a.b"]'), ['a.b']);
        test.deepEqual(parseLookup('["a[b"]'), ['a[b']);
        test.deepEqual(parseLookup('["a[b"]'), ['a[b']);
        test.deepEqual(parseLookup('["a]b"]'), ['a]b']);
        test.deepEqual(parseLookup('["a]b"]'), ['a]b']);

        /* BEGIN JSSTYLED */
        test.deepEqual(parseLookup("['a\\'[b']"), ["a'[b"]);
        test.deepEqual(parseLookup("['a\\'[b'].c"), ["a'[b", "c"]);
        /* END JSSTYLED */

        test.deepEqual(parseLookup('a/b', '/'), ['a', 'b']);
        test.deepEqual(parseLookup('a.b/c', '/'), ['a.b', 'c']);
        test.deepEqual(parseLookup('a.b/c[42]', '/'), ['a.b', 'c', 42]);
        test.deepEqual(parseLookup('["a/b"]', '/'), ['a/b']);

        test.done();
    }
};

// Process includes and excludes from 'TEST_ONLY'.
var only = [],
    excludes = [];
if (process.env.TEST_ONLY) {
    warn('Note: Limiting "test.js" tests by $TEST_ONLY: "' +
        process.env.TEST_ONLY + '"');
    var tokens = process.env.TEST_ONLY.trim().split(/\s+/);
    for (var i = 0; i < tokens.length; i++) {
        if (tokens[i][0] === '-') {
            excludes.push(tokens[i].slice(1));
        } else {
            only.push(tokens[i]);
        }
    }
}

// Add a test case for each dir with a 'test.sh' script.
var names = fs.readdirSync(__dirname);
for (var i = 0; i < names.length; ++i) {
    var name = names[i];
    if (only.length && only.indexOf(name) == -1) {
        continue;
    }
    if (excludes.length && excludes.indexOf(name) != -1) {
        continue;
    }
    var dir = path.join(__dirname, name);
    if (fs.statSync(dir).isDirectory()) {
        try {
            fs.statSync(path.join(dir, 'cmd'));
        } catch (e) {
            continue;
        }
        if (data[name] !== undefined) {
            throw ('error: test "' + name + '" already exists');
        }
        data[name] = (function (dir) {
            return function (test) {
                var numTests = 0;

                var expectedExitCode = null;
                try {
                    var p = path.join(dir, 'expected.exitCode');
                    if (fs.statSync(p)) {
                        expectedExitCode = Number(fs.readFileSync(p));
                        numTests += 1;
                    }
                } catch (e) {}

                var expectedStdout = null;
                try {
                    var p = path.join(dir, 'expected.stdout');
                    if (fs.statSync(p)) {
                        expectedStdout = fs.readFileSync(p, 'utf8');
                        numTests += 1;
                    }
                } catch (e) {}

                var expectedStderr = null;
                try {
                    var p = path.join(dir, 'expected.stderr');
                    if (fs.statSync(p)) {
                        expectedStderr = fs.readFileSync(p, 'utf8');
                        numTests += 1;
                    }
                } catch (e) {}

                test.expect(numTests);
                exec('bash cmd', {
                    'cwd': dir
                }, function (error, stdout, stderr) {
                    var errmsg = ('\n-- return value:\n' +
                        (error && error.code) + '\n-- expected stdout:\n' +
                        expectedStdout + '\n-- stdout:\n' + stdout +
                        '\n-- stdout diff:\n' +
                        ansidiff.chars(expectedStdout, stdout));
                    if (expectedStderr !== null) {
                        errmsg += '\n-- expected stderr:\n' + expectedStderr;
                    }
                    if (stderr !== null) {
                        errmsg += '\n-- stderr:\n' + stderr;
                    }
                    if (expectedStderr !== null) {
                        errmsg += '\n-- stderr diff:\n' +
                            ansidiff.chars(expectedStderr, stderr);
                    }

                    if (expectedExitCode !== null) {
                        test.equal(expectedExitCode, error && error.code || 0,
                            '\n\nunexpected exit code' + errmsg);
                    }
                    if (expectedStdout !== null) {
                        test.equal(stdout, expectedStdout,
                            '\n\nunexpected stdout' + errmsg);
                    }
                    if (expectedStderr !== null) {
                        test.equal(stderr, expectedStderr,
                            '\n\nunexpected stderr' + errmsg);
                    }
                    test.done();
                });
            }
        })(dir);
    }
}

exports['test'] = testCase(data);