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package com.arangodb;

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

public final class Request {
    private final String db;
    private final Method method;
    private final String path;
    private final Map queryParams;
    private final Map headers;
    private final T body;

    public enum Method {
        DELETE,
        GET,
        POST,
        PUT,
        HEAD,
        PATCH,
        OPTIONS
    }

    public static  Builder builder() {
        return new Builder<>();
    }

    private Request(String db, Method method, String path, Map queryParams, Map headers, T body) {
        this.db = db;
        this.method = method;
        this.path = path;
        this.queryParams = queryParams;
        this.headers = headers;
        this.body = body;
    }

    public String getDb() {
        return db;
    }

    public Method getMethod() {
        return method;
    }

    public String getPath() {
        return path;
    }

    public Map getQueryParams() {
        return queryParams;
    }

    public Map getHeaders() {
        return headers;
    }

    public T getBody() {
        return body;
    }

    public static final class Builder {
        private String db;
        private Request.Method method;
        private String path;
        private final Map queryParams;
        private final Map headers;
        private T body;

        public Builder() {
            queryParams = new HashMap<>();
            headers = new HashMap<>();
        }

        public Builder db(String db) {
            this.db = db;
            return this;
        }

        public Builder method(Request.Method method) {
            this.method = method;
            return this;
        }

        public Builder path(String path) {
            this.path = path;
            return this;
        }

        public Builder queryParam(final String key, final String value) {
            if (value != null) {
                queryParams.put(key, value);
            }
            return this;
        }

        public Builder queryParams(Map queryParams) {
            if (queryParams != null) {
                for (Map.Entry it : queryParams.entrySet()) {
                    queryParam(it.getKey(), it.getValue());
                }
            }
            return this;
        }

        public Builder header(final String key, final String value) {
            if (value != null) {
                headers.put(key, value);
            }
            return this;
        }

        public Builder headers(Map headers) {
            if (headers != null) {
                for (Map.Entry it : headers.entrySet()) {
                    header(it.getKey(), it.getValue());
                }
            }
            return this;
        }

        public Builder body(T body) {
            this.body = body;
            return this;
        }

        public Request build() {
            return new Request<>(db, method, path, queryParams, headers, body);
        }
    }
}