/*Canopy - The next generation of stoner streaming software
Copyright (C) 2024-2026 Rainbownapkin and the TTN Community

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.*/

class ChannelGuide{
    constructor(){
        //define property to hold refresh timer
        this.refreshTimer;

        //Grab DOM Nodes
        this.scheduleIndex = document.querySelector('#channel-guide-schedule-index');
        this.channelList = document.querySelector('#channel-guide-channel-list');
        this.scheduledMediaDiv = document.querySelector('#channel-guide-scheduled-media');

        //Refresh the schedule
        this.refreshList();
    }

    async refreshList(){
        //Fetch latest channel list and render it to the schedule page
        this.renderList(await utils.ajax.getChannels());
    }

    renderList(schedule, now = new Date()){
        this.renderIndex(now);
        this.renderChannelList(schedule, now);
        this.renderSchedule(schedule, now);

        //if we've got a job to refresh the list
        if(this.refreshTimer != null){
            //cancel it
            clearTimeout(this.refreshTimer);
        }

        //Set timer to refresh the thing erry minute on the minute
        setTimeout(this.refreshList.bind(this), 1000 * (60 - now.getSeconds()));
    }

    renderIndex(now = new Date()){
        //Clear schedule index
        this.scheduleIndex.innerHTML = '';

        //DO EM 3 TEIMS!
        for(let slot = 0; slot < 3; slot++){
            //Clone passed date object to prevent over-writing
            const setDate = new Date(now.getTime());

            //Up timeslot by 30 minutes for each timeslot in the loop
            setDate.setMinutes(setDate.getMinutes() + (slot * 30));

            //Generate timeslot label
            const timeslotLabel = document.createElement('h3');
            timeslotLabel.classList.add('channel-guide-timeslot-label');
            timeslotLabel.textContent = utils.ux.timeStringFromDate(setDate, false);

            //Append timeslot label to schedule index
            this.scheduleIndex.appendChild(timeslotLabel);
        }
    }

    renderChannelList(schedule, now = new Date()){
        //Clean out channel list
        this.channelList.innerHTML = '';

        for(const channel of schedule){
            //Create entry for channel
            const entry = document.createElement('div');
            entry.classList.add('channel-guide-channel-list-entry', 'channel-guide-schedule-row');
            entry.style.backgroundImage = `Url("${channel.thumbnail}")`;

            //Throw together a channel label
            const entryLabel = document.createElement('h3');
            entryLabel.textContent = utils.unescapeEntities(channel.name);

            //Some assembly required
            entry.appendChild(entryLabel);

            //Add channel entry to the list
            this.channelList.appendChild(entry);
        }
    }

    renderSchedule(schedule, now = new Date()){
        //Clear out the schedule
        this.scheduledMediaDiv.innerHTML = '';

        //Iterate through all of the received channels
        for(const channel of schedule){
            //Create a div to hold all of the current channels entries
            const channelTrack = document.createElement('div');
            channelTrack.classList.add('channel-guide-schedule-track');

            //For every scheduled video 
            for(const entry of channel.schedule){
                //Create div for current schedule entry
                const entryDiv = document.createElement('div');
                entryDiv.classList.add('channel-guide-schedule-entry', 'channel-guide-schedule-row');

                //Throw down an entry label
                const entryLabel = document.createElement('h3');
                entryLabel.textContent = utils.unescapeEntities(entry.title);

                //Assemble the entry
                entryDiv.appendChild(entryLabel);

                //slot entry into schedule track
                channelTrack.appendChild(entryDiv);
            }

            //Inject channel track into schedule div
            this.scheduledMediaDiv.appendChild(channelTrack);
        }
    }

    renderScheduleItem(item){
    }

}

const channelGuide = new ChannelGuide();