import com.tvd12.ezyfox.util.EzyMapBuilder;
import com.tvd12.ezyhttp.client.HttpClient;
import com.tvd12.ezyhttp.client.request.PostRequest;
import com.tvd12.ezyhttp.client.request.RequestEntity;
import com.tvd12.ezyhttp.core.response.ResponseEntity;

import java.util.Map;

public class GraphEmailSender {

    private static final String TENANT_ID = "Thay bằng directory id của bạn";
    private static final String CLIENT_ID = "Thay bằng application id của bạn";
    private static final String CLIENT_SECRET = "Thay bằng khoá bí mật của bạn";
    private static final String SENDER_EMAIL = "Thay bằng email mà bạn đã cấu hình";
    private static final String RECIPIENT_EMAIL = "Thay bằng email của người nhận";

    public static void main(String[] args) {
        try {
            String accessToken = getAccessToken();
            sendEmail(accessToken);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static String getAccessToken() throws Exception {
        Map<String, Object> form = EzyMapBuilder
            .mapBuilder()
            .put("client_id", CLIENT_ID)
            .put("scope", "https://graph.microsoft.com/.default")
            .put("client_secret", CLIENT_SECRET)
            .put("grant_type", "client_credentials")
            .toMap();
        RequestEntity entity = RequestEntity.builder()
            .contentType("application/x-www-form-urlencoded")
            .body(form)
            .build();
        String url = "https://login.microsoftonline.com/" +
            TENANT_ID +
            "/oauth2/v2.0/token";
        PostRequest request = new PostRequest()
            .setURL(url)
            .setEntity(entity);

        Map<String, Object> response = HttpClient.builder()
            .build()
            .call(request);
        return (String) response.get("access_token");
    }

    private static void sendEmail(String accessToken) throws Exception {
        Map<String, Object> emailBody = EzyMapBuilder
            .mapBuilder()
            .put("message", EzyMapBuilder
                .mapBuilder()
                .put("subject", "Test email from Microsoft Graph API (EzyHttp)")
                .put("body", EzyMapBuilder
                    .mapBuilder()
                    .put("contentType", "Text")
                    .put("content", "Hello, this is a test email sent via Microsoft Graph API using EzyHttp.")
                    .toMap())
                .put("toRecipients", new Object[] {
                    EzyMapBuilder
                        .mapBuilder()
                        .put("emailAddress", EzyMapBuilder
                            .mapBuilder()
                            .put("address", RECIPIENT_EMAIL)
                            .build())
                        .toMap()
                })
                .toMap())
            .toMap();
        RequestEntity entity = RequestEntity.builder()
            .header("Authorization", "Bearer " + accessToken)
            .header("Content-Type", "application/json")
            .body(emailBody)
            .build();
        String url = "https://graph.microsoft.com/v1.0/users/" +
            SENDER_EMAIL +
            "/sendMail";
        PostRequest request = new PostRequest()
            .setEntity(entity)
            .setURL(url);
        ResponseEntity response = HttpClient.builder().build().request(request);
        System.out.println("Status: " + response.getStatus());
        System.out.println("Response: " + response.getBody());
    }
}