/**
 * 系统/应用能力（契约 §8.4/§8.8/§8.10，T-M3-01）。
 *  - orientation：data="1" 横屏 / 其他 竖屏（窗口动态切换，§7.4 保留 H5 显式方向控制）。
 *  - browser：data=URL，隐式 want 拉起系统浏览器。
 *  - finsh（拼写原样）：退出当前 Ability。
 *  - openApplyDownloadpath：data=JSON{packagename,downloadpath}，按包名启动 App，失败则浏览器打开下载地址。
 *  - notification：空实现（契约标注未落地）。
 */
import { common, Want } from '@kit.AbilityKit';
import { window } from '@kit.ArkUI';
import { BusinessError } from '@kit.BasicServicesKit';
import { BridgeController } from 'feature_bridge';
import { InboundHandlers, OpenApplyDownloadReq } from 'contracts';
import { Logger } from 'common';
import { CapabilityContext, CapabilityProvider } from '../core/CapabilityProvider';

export class AppSystemProvider implements CapabilityProvider {
  readonly name: string = 'appsystem';
  private readonly log: Logger = Logger.tag('AppSystemProvider');
  private context: common.UIAbilityContext | undefined = undefined;

  register(bridge: BridgeController, ctx: CapabilityContext): void {
    this.context = ctx.uiAbilityContext;
    bridge.registerHandler(InboundHandlers.Orientation, (data: string, _cb: (resp: string) => void) => {
      this.setOrientation(data === '1');
    });
    bridge.registerHandler(InboundHandlers.Browser, (data: string, _cb: (resp: string) => void) => {
      this.openBrowser(data);
    });
    bridge.registerHandler(InboundHandlers.Finsh, (_d: string, _cb: (resp: string) => void) => {
      this.context?.terminateSelf()
        .catch((e: BusinessError) => this.log.w(`terminateSelf failed: ${e.code} ${e.message}`));
    });
    bridge.registerHandler(InboundHandlers.OpenApplyDownloadPath, (data: string, _cb: (resp: string) => void) => {
      this.openApply(data);
    });
    bridge.registerHandler(InboundHandlers.Notification, (_d: string, _cb: (resp: string) => void) => {
      // 契约标注：空实现，未落地
    });
  }

  /** 动态设方向：横屏 LANDSCAPE / 竖屏 PORTRAIT（对齐 Android setRequestedOrientation）。 */
  private setOrientation(landscape: boolean): void {
    const ctx = this.context;
    if (ctx === undefined) {
      return;
    }
    const target: window.Orientation = landscape ? window.Orientation.LANDSCAPE : window.Orientation.PORTRAIT;
    window.getLastWindow(ctx)
      .then((win: window.Window) => win.setPreferredOrientation(target))
      .catch((e: BusinessError) => this.log.w(`setOrientation failed: ${e.code} ${e.message}`));
  }

  private openBrowser(url: string): void {
    if (this.context === undefined || url === '') {
      return;
    }
    const want: Want = {
      action: 'ohos.want.action.viewData',
      entities: ['entity.system.browsable'],
      uri: url,
    };
    this.context.startAbility(want)
      .catch((e: BusinessError) => this.log.w(`openBrowser failed: ${e.code} ${e.message}`));
  }

  private openApply(data: string): void {
    const ctx = this.context;
    if (ctx === undefined) {
      return;
    }
    let req: OpenApplyDownloadReq;
    try {
      req = JSON.parse(data) as OpenApplyDownloadReq;
    } catch (e) {
      this.log.w(`openApply bad json: ${(e as Error).message}`);
      return;
    }
    // 按包名启动 App；失败回退浏览器打开下载地址
    ctx.startAbility({ bundleName: req.packagename } as Want)
      .catch((e: BusinessError) => {
        this.log.i(`start app ${req.packagename} failed (${e.code}); fallback to download page`);
        this.openBrowser(req.downloadpath);
      });
  }
}