const hue_auth = require('./auth');
const LightState = require('node-hue-api').v3.lightStates.LightState;
const time = require('../time');

hue_auth.authenticate().catch(console.error);

function assertAPI() {
    return new Promise(function(resolve, reject) {
        if (hue_auth.get_api()) {
            resolve();
        } else {
            reject("Philips Hue API unavailable");
        }
    });
}

const lightNamePadding = 20;

function lightInfo(light) {
    if (light.state.reachable) {
        return `${(light.id + "").padEnd(2)} ${light.name.padEnd(lightNamePadding)} is ${
            light.state.on ? "on" : "off"
        } at brightness ${light.state.bri}${light.state.colormode ?
            ` and ${light.state.colormode} ${light.state[light.state.colormode]}` : ""
        }`;
    }
    return `${light.name.padEnd(lightNamePadding)} is unreachable`;
}

module.exports = {
    state: {
        // https://github.com/peter-murray/node-hue-api/blob/master/docs/lightState.md#ct
        night: function() {
            return {
                white: new LightState().on().brightness(0).transition(time.one_hour),
                color: new LightState().on().white(500, 0).transition(time.one_hour)
            };
        },
        night_fast: function() {
            return {
                white: new LightState().on().brightness(0),
                color: new LightState().on().white(500, 0)
            };
        },
        bright: function() {
            return {
                white: new LightState().brightness(100),
                color: new LightState().white(153, 100)
            };
        },
        on: function() {
            return new LightState().on();
        },
        off: function() {
            return new LightState().off();
        },
    },
    color_of: function(light) {
        return light.getSupportedStates().includes("ct") ? "color" : "white";
    },
    set_all_lights: function(get_state) {
        return assertAPI().then(function() {
            return hue_auth.get_api().lights.getAll();
        }).then(function(lights) {
            for (const light of lights) {
                console.log(lightInfo(light));
                if (!light.state.reachable) {
                    continue;
                }

                let state = get_state(light);
                if (state) {
                    hue_auth.get_api().lights.setLightState(light.id, state).then(function() {
                        console.log(light.name.padEnd(lightNamePadding), "state updated");
                    }).catch(console.error);
                }
            }
        });
    }
};