import {
    requireMonitor,
    requireUser,
    requireRole
} from '#api/middlewares/index.js';
import { DbUser, UserType } from '#db/schemas/index.js';
import { RouteMethod } from '#api/RouteDescription.js';
import { getUserById } from '#db/dbAccess/index.js';
import { AlarmDto } from '#dto/AlarmDto.js';

/**
 * @type {RouteDescription}
 */
export const alarmByUserRoute = {
    path: '/user/:id/alarm',
    methods: {
        get: new RouteMethod({
            exampleHeaders: {
                Authorization: 'Bearer {{accessToken}}'
            },
            middlewares: [requireMonitor],
            description: 'Get the alarm for a monitored user, if one is set',
            async method(req, res) {
                const user = await getUserById(req.params.id);
                res.send(user.alarm ?? 'null');
            }
        }),
        delete: new RouteMethod({
            exampleHeaders: {
                Authorization: 'Bearer {{accessToken}}'
            },
            middlewares: [requireMonitor],
            description: 'Clear the alarm for a monitored user',
            async method(req, res) {
                const user = await getUserById(req.params.id);
                if (user.alarm) {
                    user.alarm = null;
                    await user.save();
                }
                res.status(204).send();
            }
        })
    }
};

/**
 * @type {RouteDescription}
 */
export const alarmListRoute = {
    path: '/alarms',
    methods: {
        get: new RouteMethod({
            exampleHeaders: {
                Authorization: 'Bearer {{accessToken}}'
            },
            middlewares: [requireMonitor],
            description: 'Get a list of all alarms for monitored users',
            async method(req, res) {
                // execute the query asynchronously and manually construct a response, for scaling reasons
                const users = DbUser.find({
                    _id: { $in: req.user.monitoredUsers },
                    alarm: { $exists: true, $ne: null }
                })
                    .lean()
                    .cursor();
                res.status(200);
                res.write('{\n');
                let first = true;
                for await (const user of users) {
                    res.write(
                        `${first ? '' : ','}"${user._id}": ${JSON.stringify(user.alarm)}\n`
                    );
                    first = false;
                }
                res.write('}');
                res.end();
            }
        })
    }
};

/**
 * @type {RouteDescription}
 */
export const alarmRoute = {
    path: '/alarm/@me',
    methods: {
        get: new RouteMethod({
            exampleHeaders: {
                Authorization: 'Bearer {{accessToken}}'
            },
            middlewares: [requireUser],
            description: "Get the current user's alarm",
            async method(req, res) {
                res.send(req.user.alarm ?? 'null');
            }
        }),
        put: new RouteMethod({
            exampleHeaders: {
                Authorization: 'Bearer {{accessToken}}'
            },
            exampleBody: {
                reason: 'fall'
            },
            middlewares: [requireUser],
            description: 'Raise an alarm (enum: one of "fall" or "toilet")',
            async method(req, res) {
                req.user.alarm = await AlarmDto.create(req.body);
                await req.user.save();
                res.status(204).send();
            }
        }),
        delete: new RouteMethod({
            exampleHeaders: {
                Authorization: 'Bearer {{accessToken}}'
            },
            middlewares: [requireUser],
            description: 'Clear alarm',
            async method(req, res) {
                if (req.user.alarm) {
                    req.user.alarm = null;
                    await req.user.save();
                }
                res.status(204).send();
            }
        })
    }
};