const commands = require('./commands.js');
const dbtools = require('./dbtools.js');
const fs = require('fs');
const permissions = require('./permissions.js');
const sdk = require('matrix-js-sdk');
const sqlite3 = require('sqlite3').verbose(); // .verbose until basics work
const yaml = require('js-yaml');

global.config = yaml.safeLoad(fs.readFileSync('config.yaml'));
global.matrixClient = sdk.createClient({
    baseUrl: config.matrix.baseurl,
    accessToken: config.matrix.accesstoken,
    userId: config.matrix.userid
});

const db = new sqlite3.Database(config.database);
dbtools.createSchema(db);

//captures unhandled rejections for easier debugging 
process.on('unhandledRejection', (reason) => {
    console.log('Reason: ' + reason);
});



matrixClient.on('Room.timeline', function(event, room, resetTimeline) {
    if(resetTimeline) {
        return;
    }
    if(event.getType() !== 'm.room.message') {
        return;
    }

    const body = event.getContent().body;

    commands.expandCommand(body, commands.projects)
    .then((expansion) => {
        permissions.eval(event.sender.userId, expansion, db)
        .then((accessgranted) => {
            let subcommand = commands.projects[expansion.project][expansion.service][expansion.subcommand];
            const args = expansion.args.match(subcommand.regex);

            if(args === null && !subcommand.regex.test(expansion.args)) {
                matrixClient.sendNotice(room.roomId, 'usage: ' + subcommand.usage);
                return;
            }

            subcommand.exec(args, room, event);
        }, (fail) => {
            matrixClient.sendNotice(room.roomId, event.sender.userId + ' ' + fail);
        });
    }, (fail) => { // command not found
        let tmp = commands.suggestFix(body, commands.projects);
        if(tmp !== null){ //when the regex matches nothing
            let suggestions = "";
            for(let i = 0; i < tmp.length; i++){
                suggestions += "\n"+tmp[i];
            }
            matrixClient.sendNotice(room.roomId, 'Unrecognized command.\n' +
                'Did you mean:'+suggestions);
        }
    });
});



matrixClient.startClient();