/**
 * Created by weijian on 2016/10/24.
 */
import {Injectable} from '@angular/core';
import {remote} from 'electron';
import * as path from 'path';

export interface Library {
    'default': boolean;
    path: string;
}

@Injectable()
export class SettingsService {

    static SETTING_LIBRARY = 'library';
    static defaultLibraries = [
        {
            'default': true,
            path: path.join(remote.app.getPath('appData'), 'MyCardLibrary')
        },
    ];
    static SETTING_LOCALE = 'locale';
    static defaultLocale = remote.app.getLocale();

    locale: string;
    libraries: Library[];


    getLibraries () {
        if (!this.libraries) {
            let data = localStorage.getItem(SettingsService.SETTING_LIBRARY);
            if (!data) {
                this.libraries = SettingsService.defaultLibraries;
                localStorage.setItem(SettingsService.SETTING_LIBRARY,
                    JSON.stringify(SettingsService.defaultLibraries));
            } else {
                this.libraries = JSON.parse(data);
            }
        }
        return this.libraries;
    }

    addLibrary (libraryPath: string, isDefault: boolean) {

        let libraries = this.getLibraries();
        if (isDefault) {
            libraries.forEach((l) => {
                l.default = false;
            });
        }
        libraries.push({'default': isDefault, path: libraryPath});
        this.libraries = libraries;
        localStorage.setItem(SettingsService.SETTING_LIBRARY, JSON.stringify(libraries));
    }

    setDefaultLibrary (library: Library) {
        let libraries = this.getLibraries();
        libraries.forEach((l) => {
            l.default = library.path === l.path;
        });
        this.libraries = libraries;
        localStorage.setItem(SettingsService.SETTING_LIBRARY, JSON.stringify(libraries));
    }

    getDefaultLibrary (): Library {
        if (!this.libraries) {
            this.getLibraries();
        }
        let result = this.libraries.find((item) => item.default === true);
        if (result) {
            return result;
        } else {
            throw('no default library found');
        }
    }

    getLocale (): string {
        if (!this.locale) {
            let locale = localStorage.getItem(SettingsService.SETTING_LOCALE);
            if (!locale) {
                this.locale = SettingsService.defaultLocale;
                localStorage.setItem(SettingsService.SETTING_LOCALE, SettingsService.defaultLocale);
            } else {
                this.locale = locale;
            }
        }
        return this.locale;
    }

    setLocale (locale: string) {
        this.locale = locale;
        localStorage.setItem(SettingsService.SETTING_LOCALE, locale);
    }
}
