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package com.slack.api.bolt.micronaut;

import com.slack.api.bolt.App;
import com.slack.api.bolt.request.Request;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.HttpResponse;
import io.micronaut.http.MediaType;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;
import io.micronaut.http.annotation.Post;

/**
 * The default Web controller that works in Micronaut apps.
 * This component requires singleton {@link App} instance managed by the Micronaut DI container.
 *
 * @see The official tutorial
 * @see @Controller annotation
 */
@Controller("/slack")
public class SlackAppController {

    private final App slackApp;
    private final SlackAppMicronautAdapter adapter;

    public SlackAppController(App slackApp, SlackAppMicronautAdapter adapter) {
        this.slackApp = slackApp;
        this.adapter = adapter;
    }

    @Post(value = "/events", consumes = {MediaType.APPLICATION_FORM_URLENCODED, MediaType.APPLICATION_JSON})
    public HttpResponse events(HttpRequest request) throws Exception {
        String body = request.getBody().orElse(null);
        return adapt(request, body);
    }

    @Get("/install")
    public HttpResponse install(HttpRequest request) throws Exception {
        if (!slackApp.config().isOAuthInstallPathEnabled()) {
            return HttpResponse.notFound();
        }
        return adapt(request, null);
    }

    @Get("/oauth_redirect")
    public HttpResponse oauthRedirect(HttpRequest request) throws Exception {
        if (!slackApp.config().isOAuthRedirectUriPathEnabled()) {
            return HttpResponse.notFound();
        }
        return adapt(request, null);
    }

    private HttpResponse adapt(HttpRequest request, String body) throws Exception {
        Request slackRequest = adapter.toSlackRequest(request, body);
        return adapter.toMicronautResponse(slackApp.run(slackRequest));
    }

}