import { Component, OnInit } from '@angular/core';
import {StatusService} from '../../services/status.service';
import {SiteViewModel} from '../../view-models/site.view-model';
import {HostStatusViewModel} from '../../view-models/host-status.view-model';
import {StatusEnumViewModel} from '../../view-models/status-enum.view-model';

@Component({
    selector: 'app-status',
    templateUrl: './status.component.html',
    styleUrls: [ './status.component.css' ]
})
export class StatusComponent implements OnInit {
    hostsStatus: SiteViewModel[] = [];
    promise = null;

    constructor(private statusService: StatusService) { }

    ngOnInit() {
        this.getStatus();
    }

    getStatus(): void {
        this.promise = this.statusService.getHosts()
            .subscribe(hostsStatus => {
                const hostsStatusData = hostsStatus.data;
                this.hostsStatus = hostsStatusData.map(site => {
                    const siteVm = new SiteViewModel();
                    siteVm.name = site.name;
                    siteVm.hosts = site.hosts.map(host => {
                        const hostVM = new HostStatusViewModel();
                        hostVM.ip = host.hostStatus.ip;
                        hostVM.hostname = host.hostStatus.hostname;
                        hostVM.times = host.hostStatus.times;

                        let allNull = true;
                        let oneNull = false;
                        hostVM.timesMin = Number.MAX_SAFE_INTEGER;
                        hostVM.timesAvg = 0;
                        hostVM.timesMax = 0;
                        hostVM.timesLost = 0;
                        hostVM.times.forEach(p => {
                            if (p == null) {
                                ++hostVM.timesLost;
                                oneNull = true;
                            } else {
                                allNull = false;
                                if (p < hostVM.timesMin) {
                                    hostVM.timesMin = p;
                                }
                                if (p > hostVM.timesMax) {
                                    hostVM.timesMax = p;
                                }
                                hostVM.timesAvg += p;
                            }
                        });
                        if (hostVM.times.length - hostVM.timesLost !== 0) {
                            hostVM.timesAvg = hostVM.timesAvg / (hostVM.times.length - hostVM.timesLost);
                        } else {
                            hostVM.timesMin = null;
                            hostVM.timesAvg = null;
                            hostVM.timesMax = null;
                        }

                        if (allNull) {
                            hostVM.status = StatusEnumViewModel.Error;
                        } else if (oneNull) {
                            hostVM.status = StatusEnumViewModel.Warning;
                        } else {
                            hostVM.status = StatusEnumViewModel.Ok;
                        }

                        return hostVM;
                    });

                    const status: {[id: number]: number} = {};
                    status[StatusEnumViewModel.Ok] = 0;
                    status[StatusEnumViewModel.Warning] = 0;
                    status[StatusEnumViewModel.Error] = 0;

                    siteVm.hosts.forEach(host => {
                        ++status[host.status];
                    });
                    if (status[StatusEnumViewModel.Error] === siteVm.hosts.length) {
                        siteVm.status = StatusEnumViewModel.Error;
                    } else if (status[StatusEnumViewModel.Error] !== 0 || status[StatusEnumViewModel.Warning] !== 0) {
                        siteVm.status = StatusEnumViewModel.Warning;
                    } else {
                        siteVm.status = StatusEnumViewModel.Ok;
                    }

                    return siteVm;
                });
            });
    }

    onclick(): void {
        this.getStatus();
    }
}