using AWSPowerShellGenerator.Analysis;
using AWSPowerShellGenerator.ServiceConfig;
using AWSPowerShellGenerator.Writers;

namespace AWSPowerShellGenerator.Generators.ParamEmitters.AmazonS3
{
    internal class HttpVerbParamEmitter : IParamEmitter
    {
        public void WriteParams(IndentedTextWriter writer, OperationAnalyzer analyzer, SimplePropertyInfo spi, Param paramCustomization)
        {
            // replace the enum type with a string param instead and convert to enum member on execution
            writer.WriteLine("/// <summary>");
            writer.WriteLine("/// Specifies the HTTP verb to be used. The allowable verbs are GET, PUT, HEAD and DELETE.");
            writer.WriteLine("/// Not all verbs may be accepted by the service operation; check service documentation for details.");
            writer.WriteLine("/// If not specified, the default verb is GET.");
            writer.WriteLine("/// </summary>");
            if (spi.IsRecursivelyRequired && spi.DefaultValue == null)
            {
                writer.WriteLine("#if !MODULAR");
                writer.WriteLine("[System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]");
                writer.WriteLine("#else");
                writer.WriteLine("[System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true, Mandatory = true)]");
                if (spi.PropertyType == typeof(string))
                {
                    writer.WriteLine("[System.Management.Automation.AllowEmptyString]");
                }
                writer.WriteLine("#endif");
                writer.WriteLine("[Amazon.PowerShell.Common.AWSRequiredParameter]");
            }
            else
            {
                writer.WriteLine("[System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]");
            }
            writer.WriteLine("public String {0} {{ get; set; }}", spi.CmdletParameterName);
        }

        public void WriteContextMembers(IndentedTextWriter writer, string contextVar, SimplePropertyInfo spi, Param paramCustomization)
        {
            string contextMember = string.Format("{0}.{1}", contextVar, spi.CmdletParameterName);

            writer.WriteLine("if (!string.IsNullOrEmpty(this.{0}))", spi.CmdletParameterName);
            writer.OpenRegion();
            {
                writer.WriteLine("try");
                writer.OpenRegion();
                {
                    writer.WriteLine("{0} = (HttpVerb)Enum.Parse(typeof(HttpVerb), this.{1}, true);", contextMember, spi.CmdletParameterName);
                }
                writer.CloseRegion();
                writer.WriteLine("catch (ArgumentException e)");
                writer.OpenRegion();
                {
                    writer.WriteLine("string errMsg = \"Invalid parameter value; allowable values: \" + string.Join(\", \", Enum.GetNames(typeof(HttpVerb)));");
                    writer.WriteLine("this.ThrowArgumentError(errMsg, this.{0}, e);", spi.CmdletParameterName);
                }
                writer.CloseRegion();
            }
            writer.CloseRegion();
            writer.WriteLine();
        }
    }
}