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package com.slack.api.bolt.response;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static com.slack.api.bolt.util.JsonOps.toJsonString;

/**
 * HTTP response to the Slack API server.
 */
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Response {

    @Builder.Default
    private Integer statusCode = 200;
    @Builder.Default
    private String contentType = "text/plain";
    @Builder.Default
    private Map> headers = new HashMap<>();
    private String body;

    /**
     * This is no longer used. Use CONTENT_TYPE_APPLICATION_JSON_UTF8 instead.
     */
    @Deprecated
    public static final String CONTENT_TYPE_APPLICATION_JSON = "application/json";

    public static final String CONTENT_TYPE_APPLICATION_JSON_UTF8 = "application/json; charset=utf-8";

    public static Response ok() {
        return Response.builder().statusCode(200).build();
    }

    public static Response ok(Object body) {
        if (body instanceof String) {
            return Response.builder().statusCode(200).body((String) body).build();
        } else {
            String json = toJsonString(body);
            return Response.builder()
                    .statusCode(200)
                    .contentType(CONTENT_TYPE_APPLICATION_JSON_UTF8)
                    .body(json)
                    .build();
        }
    }

    public static Response error(Integer statusCode) {
        return Response.builder().statusCode(statusCode).build();
    }

    public static Response json(Integer statusCode, Object body) {
        return Response.builder()
                .statusCode(statusCode)
                .contentType(CONTENT_TYPE_APPLICATION_JSON_UTF8)
                .body(toJsonString(body))
                .build();
    }

}