import { Injectable } from '@angular/core'
import { HttpClient } from '@angular/common/http'
import { Observable, of, throwError } from 'rxjs'
import { tap, catchError } from 'rxjs/operators'
import { WebSiteConfig } from '@cdk/public-api'

@Injectable({
	providedIn: 'root',
})
export class ConfigService {
	private configUrl = 'assets/config.json'
	private appConfig: WebSiteConfig | null = null

	constructor(private http: HttpClient) {}

	loadConfig(): Observable<WebSiteConfig> {
		if (this.appConfig) {
			return of(this.appConfig)
		}

		console.log(123)

		return this.http.get<WebSiteConfig>(this.configUrl).pipe(
			tap((config) => {
				this.appConfig = config
			}),
			catchError((error) => {
				console.error('加载 config.json 失败:', error)

				return throwError(() => new Error('无法加载应用配置'))
			}),
		)
	}

	getConfig(): WebSiteConfig | null {
		return this.appConfig
	}
}