var express   = require('express');
var router    = express.Router();
var dbEvents = require('../../database/events');
var moment = require('moment-timezone');


router.get("/:id",function(req,res){
    dbEvents.getEvent(req.params.id,function(error,event){
        if (error){
            res.status(404).json({"status":404,"message":"Error processing request"});
            return;
        }
        if (event == null){
            res.status(404).json({"status":404,"message":"Event does not exist"});
            return;
        }
        res.status(200).json({"status":200,"event":event});
    });
});

router.get("/page/:page",function(req,res){
    console.log("page");
    var pageSize = 5;
    if (req.query.pageSize){
        pageSize = parseInt(req.query.pageSize);        
    }
    dbEvents.getEvents(pageSize,req.params.page,function(err,events){
        if (err){
            res.status(500).json({"status":500,"message":"Error processing request","error":err});
            return;
        }
        if (req.params.page < 2 && events.length < 23){ 
            var offset = moment.tz("Mountain/Denver").offset(new Date());       
            var nowMountain = moment.tz(new Date(),"Mountain/Denver");            
            var nextSundayMorning = nextDay(nowMountain, 0, 7);
            var nextSundayMorning2 = nextDay(nowMountain, 0, 11);
            var nextSundayEvening = nextDay(nowMountain, 0, 19);
            var nextWednesday = nextDay(nowMountain, 3, 7, 19);
            if (nextWednesday < nextSundayMorning){
                nextWednesday.setHours(19);
                nextWednesday.setMinutes(0);
                nextWednesday.setSeconds(0);
                events.push({
                    title: 'Wednesday Evening',
                    startDate: nextWednesday,
                    endDate: new Date(nextWednesday).setHours(20),
                    description: 'Bible study and prayer for Wednesday evening.'
                });
            }
            events.push({
                title: 'Sunday School ' + offset,
                startDate: moment.tz(nextSundayMorning,"America/Denver").format(),
                endDate: new Date(nextSundayMorning).setHours(11),
                description: 'Sunday School Service'
            });
            events.push({
                title: 'Sunday Morning Worship',
                startDate: nextSundayMorning2,
                endDate: new Date(nextSundayMorning2).setHours(12),
                description: 'Sunday Morning Worship Service'
            });
            events.push({
                title: 'Sunday Evening',
                startDate: nextSundayEvening,
                endDate: new Date(nextSundayEvening).setHours(20),
                description: 'Sunday Evening Service'
            });
            // id: json.id,
            // title: json.title,
            // startDate: new Date(json.startDate),
            // endDate: new Date(json.endDate),
            // description: json.description
        }
        res.status(200).json({"status":200,"events":events,"page":req.params.page,"pageSize":pageSize > events.length ? events.length : pageSize});
    });
});


router.post("/a/", function(req,res){
    console.log(req.body);
    if (!req.body.title || !req.body.startDate || !req.body.endDate || !req.body.description){
        removeFile(req.body.tmpPath);
        res.status(400).json({"status":400,"message":"title, startDate, endDate, and description are required fields in the body"});
        return;
    }

    dbEvents.insertEvent(req.body.title,req.body.startDate,req.body.endDate,req.body.timezoneOffset,req.body.description,function(error,event){
        if (error){
            res.status(500).json({"status":500,"message":"There was an error inserting the event"});
            return;
        }
        if (event == null){
            res.status(404).json({"status":404,"message":"Event does not exist"});
            return;
        }
        res.status(201).json({"status":201,"event":event});
        return;       
    });
});

router.delete("/a/",function(req,res){
    if (!req.body.id){
        res.status(400).json({"status":400,"message":"id of the event needs to be supplied to delete"});
        return;
    }
    dbEvents.deleteEvent(req.body.id,function(error,result){
        if (error){
            res.status(500).json({"status":500,"message":"There was an error deleting the event"});
            return;
        }
        res.status(200).json({"status":200,"affectedRows":result.affectedRows});
        
    });
});

function nextDay(startDate, dayOfWeek, hour){
    startDate = new Date(startDate);
    startDate.setDate(startDate.getDate() + (dayOfWeek+(7-startDate.getDay())) % 7);
    startDate.setHours(hour);
    startDate.setMinutes(0);
    startDate.setSeconds(0);
    startDate.setMilliseconds(0);
    return startDate;
}

module.exports = router;