import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { NgModule, ModuleWithProviders, InjectionToken } from '@angular/core';
import { CM_ROOT_OPTION, ICosmosModuleOption } from './cosmos.root.option';
import { TranslateModule, TranslateLoader } from '@ngx-translate/core';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/of';
import { CmI18nService, zh as CmZh, en as CmEn } from './service/i18n.service';
import { CmThemeService, dark as CmDark, light as CmLight } from './service/theme.service';
import { BaseComponentModule, baseComponentModuleArray } from './base/base.component.module';
import { BusinessComponentModule, businessComponentModuleArray } from './business/business.component.module';
import { ChartComponentModule, chartComponentModuleArray } from './chart/chart.component.module';

// 导出基础组件和模块
export * from './base/base.component.module';
// 导出业务组件和模块
export * from './business/business.component.module';
// 导出图表组件和模块
export * from './chart/chart.component.module';

// 导出服务
export { CmI18nService, zh as CmZh, en as CmEn } from './service/i18n.service';
export { CmThemeService, dark as CmDark, light as CmLight } from './service/theme.service';
export * from './base/upload/interface';

// 国际化支持
import * as zhJson from './langs/zh';
import * as enJson from './langs/en';

export class CosmosTranslateLoader implements TranslateLoader {
    public getTranslation(lang: string): any {
        let langJson = null;
        if (lang == CmZh) {
            langJson = zhJson;
        } else if (lang == CmEn) {
            langJson = enJson;
        }
        return Observable.of(langJson.json);
    }
}

@NgModule({
    imports: [
        CommonModule,
        FormsModule,
        BaseComponentModule.forRoot(),
        ChartComponentModule.forRoot(),
        BusinessComponentModule.forRoot(),
        TranslateModule.forRoot({
            loader: {
                provide: TranslateLoader,
                useClass: CosmosTranslateLoader
            }
        }),
    ],
    exports: [
        ...baseComponentModuleArray,
        ...businessComponentModuleArray,
        ...chartComponentModuleArray
    ]
})
export class CosmosModule {

    static forRoot(options?: ICosmosModuleOption): ModuleWithProviders {
        return {
            ngModule: CosmosModule,
            providers: [
                CmI18nService,
                CmThemeService
            ]
        }
    }

    static forChild(): ModuleWithProviders {
        return {
            ngModule: CosmosModule
        }
    }
}