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{{>partial_header}}

using System;
using System.Reflection;
{{^net35}}
using System.Collections.Concurrent;
{{/net35}}
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace {{packageName}}.Client
{
    /// 
    /// Represents a set of configuration settings
    /// 
    {{>visibility}} class Configuration : IReadableConfiguration
    {
        #region Constants

        /// 
        /// Version of the package.
        /// 
        /// Version of the package.
        public const string Version = "{{packageVersion}}";

        /// 
        /// Identifier for ISO 8601 DateTime Format
        /// 
        /// See https://msdn.microsoft.com/en-us/library/az4se3k1(v=vs.110).aspx#Anchor_8 for more information.
        // ReSharper disable once InconsistentNaming
        public const string ISO8601_DATETIME_FORMAT = "o";

        #endregion Constants

        #region Static Members
        
        /// 
        /// Default creation of exceptions for a given method name and response object
        /// 
        public static readonly ExceptionFactory DefaultExceptionFactory = (methodName, response) =>
        {
            var status = (int)response.StatusCode;
            if (status >= 400)
            {
                return new ApiException(status,
                    string.Format("Error calling {0}: {1}", methodName, response.Content),
                    response.Content);
            }
            {{^netStandard}}if (status == 0)
            {
                return new ApiException(status,
                    string.Format("Error calling {0}: {1}", methodName, response.ErrorText), response.ErrorText);
            }{{/netStandard}}
            return null;
        };

        #endregion Static Members

        #region Private Members

        /// 
        /// Defines the base path of the target API server.
        /// Example: http://localhost:3000/v1/
        /// 
        private String _basePath;
        
        /// 
        /// Gets or sets the API key based on the authentication name.
        /// This is the key and value comprising the "secret" for acessing an API.
        /// 
        /// The API key.
        private IDictionary _apiKey;

        /// 
        /// Gets or sets the prefix (e.g. Token) of the API key based on the authentication name.
        /// 
        /// The prefix of the API key.
        private IDictionary _apiKeyPrefix;

        private string _dateTimeFormat = ISO8601_DATETIME_FORMAT;
        private string _tempFolderPath = Path.GetTempPath();

        #endregion Private Members

        #region Constructors

        /// 
        /// Initializes a new instance of the  class
        /// 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("ReSharper", "VirtualMemberCallInConstructor")]
        public Configuration()
        {
            UserAgent = "{{#httpUserAgent}}{{.}}{{/httpUserAgent}}{{^httpUserAgent}}OpenAPI-Generator/{{packageVersion}}/csharp{{/httpUserAgent}}";
            BasePath = "{{{basePath}}}";
            DefaultHeader = new {{^net35}}Concurrent{{/net35}}Dictionary();
            ApiKey = new {{^net35}}Concurrent{{/net35}}Dictionary();
            ApiKeyPrefix = new {{^net35}}Concurrent{{/net35}}Dictionary();

            // Setting Timeout has side effects (forces ApiClient creation).
            Timeout = 100000;
        }

        /// 
        /// Initializes a new instance of the  class
        /// 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("ReSharper", "VirtualMemberCallInConstructor")]
        public Configuration(
            IDictionary defaultHeader,
            IDictionary apiKey,
            IDictionary apiKeyPrefix,
            string basePath = "{{{basePath}}}") : this()
        {
            if (string.{{^net35}}IsNullOrWhiteSpace{{/net35}}{{#net35}}IsNullOrEmpty{{/net35}}(basePath))
                throw new ArgumentException("The provided basePath is invalid.", "basePath");
            if (defaultHeader == null)
                throw new ArgumentNullException("defaultHeader");
            if (apiKey == null)
                throw new ArgumentNullException("apiKey");
            if (apiKeyPrefix == null)
                throw new ArgumentNullException("apiKeyPrefix");

            BasePath = basePath;

            foreach (var keyValuePair in defaultHeader)
            {
                DefaultHeader.Add(keyValuePair);
            }

            foreach (var keyValuePair in apiKey)
            {
                ApiKey.Add(keyValuePair);
            }

            foreach (var keyValuePair in apiKeyPrefix)
            {
                ApiKeyPrefix.Add(keyValuePair);
            }
        }

        #endregion Constructors

        #region Properties

        /// 
        /// Gets or sets the base path for API access.
        /// 
        public virtual string BasePath {
            get { return _basePath; }
            set {
                _basePath = value;
            }
        }

        /// 
        /// Gets or sets the default header.
        /// 
        public virtual IDictionary DefaultHeader { get; set; }

        /// 
        /// Gets or sets the HTTP timeout (milliseconds) of ApiClient. Default to 100000 milliseconds.
        /// 
        public virtual int Timeout { get; set; }

        /// 
        /// Gets or sets the HTTP user agent.
        /// 
        /// Http user agent.
        public virtual string UserAgent { get; set; }

        /// 
        /// Gets or sets the username (HTTP basic authentication).
        /// 
        /// The username.
        public virtual string Username { get; set; }

        /// 
        /// Gets or sets the password (HTTP basic authentication).
        /// 
        /// The password.
        public virtual string Password { get; set; }

        /// 
        /// Gets the API key with prefix.
        /// 
        /// API key identifier (authentication scheme).
        /// API key with prefix.
        public string GetApiKeyWithPrefix(string apiKeyIdentifier)
        {
            string apiKeyValue;
            ApiKey.TryGetValue (apiKeyIdentifier, out apiKeyValue);
            string apiKeyPrefix;
            if (ApiKeyPrefix.TryGetValue(apiKeyIdentifier, out apiKeyPrefix))
            {
                return apiKeyPrefix + " " + apiKeyValue;
            }
            
            return apiKeyValue;
        }

        /// 
        /// Gets or sets the access token for OAuth2 authentication.
        /// 
        /// This helper property simplifies code generation.
        /// 
        /// The access token.
        public virtual string AccessToken { get; set; }

        /// 
        /// Gets or sets the temporary folder path to store the files downloaded from the server.
        /// 
        /// Folder path.
        public virtual string TempFolderPath
        {
            get { return _tempFolderPath; }

            set
            {
                if (string.IsNullOrEmpty(value))
                {
                    _tempFolderPath = Path.GetTempPath();
                    return;
                }

                // create the directory if it does not exist
                if (!Directory.Exists(value))
                {
                    Directory.CreateDirectory(value);
                }

                // check if the path contains directory separator at the end
                if (value[value.Length - 1] == Path.DirectorySeparatorChar)
                {
                    _tempFolderPath = value;
                }
                else
                {
                    _tempFolderPath = value + Path.DirectorySeparatorChar;
                }
            }
        }

        /// 
        /// Gets or sets the date time format used when serializing in the ApiClient
        /// By default, it's set to ISO 8601 - "o", for others see:
        /// https://msdn.microsoft.com/en-us/library/az4se3k1(v=vs.110).aspx
        /// and https://msdn.microsoft.com/en-us/library/8kb3ddd4(v=vs.110).aspx
        /// No validation is done to ensure that the string you're providing is valid
        /// 
        /// The DateTimeFormat string
        public virtual string DateTimeFormat
        {
            get { return _dateTimeFormat; }
            set
            {
                if (string.IsNullOrEmpty(value))
                {
                    // Never allow a blank or null string, go back to the default
                    _dateTimeFormat = ISO8601_DATETIME_FORMAT;
                    return;
                }

                // Caution, no validation when you choose date time format other than ISO 8601
                // Take a look at the above links
                _dateTimeFormat = value;
            }
        }

        /// 
        /// Gets or sets the prefix (e.g. Token) of the API key based on the authentication name.
        ///
        /// Whatever you set here will be prepended to the value defined in AddApiKey.
        /// 
        /// An example invocation here might be:
        /// 
        /// ApiKeyPrefix["Authorization"] = "Bearer";
        /// 
        /// … where ApiKey["Authorization"] would then be used to set the value of your bearer token.
        /// 
        /// 
        /// OAuth2 workflows should set tokens via AccessToken.
        /// 
        /// 
        /// The prefix of the API key.
        public virtual IDictionary ApiKeyPrefix
        {
            get { return _apiKeyPrefix; }
            set
            {
                if (value == null)
                {
                    throw new InvalidOperationException("ApiKeyPrefix collection may not be null.");
                }
                _apiKeyPrefix = value;
            }
        }

        /// 
        /// Gets or sets the API key based on the authentication name.
        /// 
        /// The API key.
        public virtual IDictionary ApiKey
        {
            get { return _apiKey; }
            set
            {
                if (value == null)
                {
                    throw new InvalidOperationException("ApiKey collection may not be null.");
                }
                _apiKey = value;
            }
        }

        #endregion Properties

        #region Methods

        /// 
        /// Returns a string with essential information for debugging.
        /// 
        public static String ToDebugReport()
        {
            String report = "C# SDK ({{{packageName}}}) Debug Report:\n";
            {{^netStandard}}
            {{^supportsUWP}}
            report += "    OS: " + System.Environment.OSVersion + "\n";
            report += "    .NET Framework Version: " + System.Environment.Version  + "\n";
            {{/supportsUWP}}
            {{/netStandard}}
            {{#netStandard}}
            report += "    OS: " + System.Runtime.InteropServices.RuntimeInformation.OSDescription + "\n";
            {{/netStandard}}
            report += "    Version of the API: {{{version}}}\n";
            report += "    SDK Package Version: {{{packageVersion}}}\n";

            return report;
        }

        /// 
        /// Add Api Key Header.
        /// 
        /// Api Key name.
        /// Api Key value.
        /// 
        public void AddApiKey(string key, string value)
        {
            ApiKey[key] = value;
        }

        /// 
        /// Sets the API key prefix.
        /// 
        /// Api Key name.
        /// Api Key value.
        public void AddApiKeyPrefix(string key, string value)
        {
            ApiKeyPrefix[key] = value;
        }

        #endregion Methods

        #region Static Members
        /// 
        /// Merge configurations.
        /// 
        /// First configuration.
        /// Second configuration.
        /// Merged configuration.
        public static IReadableConfiguration MergeConfigurations(IReadableConfiguration first, IReadableConfiguration second)
        {
            if (second == null) return first ?? GlobalConfiguration.Instance;
            
            Dictionary apiKey = first.ApiKey.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
            Dictionary apiKeyPrefix = first.ApiKeyPrefix.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
            Dictionary defaultHeader = first.DefaultHeader.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
            
            foreach (var kvp in second.ApiKey) apiKey[kvp.Key] = kvp.Value;
            foreach (var kvp in second.ApiKeyPrefix) apiKeyPrefix[kvp.Key] = kvp.Value;
            foreach (var kvp in second.DefaultHeader) defaultHeader[kvp.Key] = kvp.Value;

            var config = new Configuration
            {
                ApiKey = apiKey,
                ApiKeyPrefix = apiKeyPrefix,
                DefaultHeader = defaultHeader,
                BasePath = second.BasePath ?? first.BasePath,
                Timeout = second.Timeout,
                UserAgent = second.UserAgent ?? first.UserAgent,
                Username = second.Username ?? first.Username,
                Password = second.Password ?? first.Password,
                AccessToken = second.AccessToken ?? first.AccessToken,
                TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat
            };
            return config;
        }
        #endregion Static Members
    }
}




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