var express = require('express');
var request = require('superagent');
var router = express.Router();
var disabledIP = require('../utils/disabledIP').list;
var cookie = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36' };

router.get('/*', function(req, res, next) {
    getJSON(req, res, next);
});

router.post('/*', function(req, res, next) {
    getJSON(req, res, next);
});

function getJSON(req, res, next) {
    var ip = req.headers['x-real-ip'] ? req.headers['x-real-ip'] : req.ip.replace(/::ffff:/, '');
    var host = req.hostname;
    var protocol = req.protocol;
    var originalUrl = req.originalUrl;
    var url = req.query.url || req.body.url;
    var callback = req.query.callback || req.body.callback;
    var params = req.body;
    var output = {
        data: {
            IP: ip,
            Info: 'Please Set URL Like This: ' + protocol + '://' + host + '/v1/?url=http[s]://YourWantProxyUrl.Com'
        },
        status: {
            code: 200,
            message: ''
        }
    };
    if (disabledIP.indexOf(ip) > -1) {

        output['data']['info'] = '很抱歉，您的IP因为滥用接口已被禁用，如有疑问，请致信 xioveliu@gmail.com ';
        output['status'] = -1;
        output['message'] = 'DISABLED IP';
        res.json(output);

    } else {

        method = req.method.toUpperCase();
        var _cookies = req.cookies;
        //console.log(headers);
        if (url) {
            var _temp = {};
            switch (method) {
                case 'GET':
                    // get request
                    if (/\?url\=/.test(originalUrl)) {
                        url = originalUrl.split('url=')[1];
                    }

                    if (params) {
                        for (var i in params) {
                            _temp[i] = encodeURI(params[i]);
                        }
                    }
                    url = url.indexOf('?') === -1 ? url.replace(/\&/, '?') : url;
                    url = /^(http|https)\:\/\//.test(url) ? url : 'http://' + url;
                    url = url.replace(/\&callback\=(\w+)/, '');
                    request
                        .get(url)
                        .set(req.headers)
                        .set(_cookies)
                        .query(_temp)
                        .end(function(err, response) {
                            var body = {};
                            if (response && response.text) {
                                body = response.text;
                            } else if (response && response.body) {
                                body = response.body;
                            }
                            if (typeof body === 'string') {
                                try {
                                    body = JSON.parse(body);
                                } catch (e) {
                                    output.status = {
                                        code: -1
                                    };
                                }
                            }
                            if (!err && response.statusCode == 200) {
                                output = body;
                            } else {
                                output = {
                                    data: {},
                                    status: {
                                        code: -1,
                                        message: err || 'Something bad happend.'
                                    }
                                };
                            }
                            if (callback) {
                                res.jsonp(output);
                            } else {
                                res.json(output);
                            }
                        });
                    break;
                default:
                    // post request
                    if (params) {
                        for (var i in params) {
                            _temp[i] = params[i];
                        }
                    }
                    request
                        .post(url)
                        .set(req.headers)
                        .set(_cookies)
                        .type('form')
                        .send(_temp)
                        .end(function(err, response) {
                            var body = {};
                            if (response && response.text) {
                                body = response.text;
                            } else if (response && response.body) {
                                body = response.body;
                            }
                            if (typeof body === 'string') {
                                try {
                                    body = JSON.parse(body);
                                } catch (e) {
                                    output.status = {
                                        code: -1
                                    };
                                }
                            }
                            if (!err && response.statusCode == 200) {
                                output = body;
                            } else {
                                output = {
                                    data: {},
                                    status: {
                                        code: -1,
                                        message: err || 'Something bad happend.'
                                    }
                                };
                            }
                            if (callback) {
                                res.jsonp(output);
                            } else {
                                res.json(output);
                            }
                        });
                    break;
            }
        } else {
            if (callback) {
                res.jsonp(output);
            } else {
                res.json(output);
            }
        }
    }

}



module.exports = router;