using System.IO;
using System.Linq;
using System.Runtime.InteropServices.ComTypes;
using JetBrains.Annotations;
using Microsoft.OpenApi.Models;
using Microsoft.OpenApi.Readers;
using SharpYaml.Model;
using Stef.Validation;
using WireMock.Net.OpenApiParser.Settings;
using WireMock.Server;

namespace WireMock.Net.OpenApiParser.Extensions
{
    /// <summary>
    /// Some extension methods for <see cref="IWireMockServer"/>.
    /// </summary>
    public static class WireMockServerExtensions
    {
        /// <summary>
        /// Register the mappings via an OpenAPI (swagger) V2 or V3 file.
        /// </summary>
        /// <param name="server">The WireMockServer instance</param>
        /// <param name="path">Path containing OpenAPI file to parse and use the mappings.</param>
        /// <param name="diagnostic">Returns diagnostic object containing errors detected during parsing</param>
        [PublicAPI]
        public static IWireMockServer WithMappingFromOpenApiFile(this IWireMockServer server, string path, out OpenApiDiagnostic diagnostic)
        {
            return WithMappingFromOpenApiFile(server, path, null, out diagnostic);
        }

        /// <summary>
        /// Register the mappings via an OpenAPI (swagger) V2 or V3 file.
        /// </summary>
        /// <param name="server">The WireMockServer instance</param>
        /// <param name="path">Path containing OpenAPI file to parse and use the mappings.</param>
        /// <param name="diagnostic">Returns diagnostic object containing errors detected during parsing</param>
        /// <param name="settings">Additional settings</param>
        [PublicAPI]
        public static IWireMockServer WithMappingFromOpenApiFile(this IWireMockServer server, string path, WireMockOpenApiParserSettings settings, out OpenApiDiagnostic diagnostic)
        {
            Guard.NotNull(server, nameof(server));
            Guard.NotNullOrEmpty(path, nameof(path));

            var mappings = new WireMockOpenApiParser().FromFile(path, settings, out diagnostic);

            return server.WithMapping(mappings.ToArray());
        }

        /// <summary>
        /// Register the mappings via an OpenAPI (swagger) V2 or V3 stream.
        /// </summary>
        /// <param name="server">The WireMockServer instance</param>
        /// <param name="stream">Stream containing OpenAPI description to parse and use the mappings.</param>
        /// <param name="diagnostic">Returns diagnostic object containing errors detected during parsing</param>
        [PublicAPI]
        public static IWireMockServer WithMappingFromOpenApiStream(this IWireMockServer server, Stream stream, out OpenApiDiagnostic diagnostic)
        {
            return WithMappingFromOpenApiStream(server, stream, null, out diagnostic);
        }

        /// <summary>
        /// Register the mappings via an OpenAPI (swagger) V2 or V3 stream.
        /// </summary>
        /// <param name="server">The WireMockServer instance</param>
        /// <param name="stream">Stream containing OpenAPI description to parse and use the mappings.</param>
        /// <param name="settings">Additional settings</param>
        /// <param name="diagnostic">Returns diagnostic object containing errors detected during parsing</param>
        [PublicAPI]
        public static IWireMockServer WithMappingFromOpenApiStream(this IWireMockServer server, Stream stream, WireMockOpenApiParserSettings settings, out OpenApiDiagnostic diagnostic)
        {
            Guard.NotNull(server, nameof(server));
            Guard.NotNull(stream, nameof(stream));
            Guard.NotNull(settings, nameof(settings));

            var mappings = new WireMockOpenApiParser().FromStream(stream, settings, out diagnostic);

            return server.WithMapping(mappings.ToArray());
        }

        /// <summary>
        /// Register the mappings via an OpenAPI (swagger) V2 or V3 document.
        /// </summary>
        /// <param name="server">The WireMockServer instance</param>
        /// <param name="document">The OpenAPI document to use as mappings.</param>
        /// <param name="settings">Additional settings [optional]</param>
        [PublicAPI]
        public static IWireMockServer WithMappingFromOpenApiDocument(this IWireMockServer server, OpenApiDocument document, WireMockOpenApiParserSettings settings = null)
        {
            Guard.NotNull(server, nameof(server));
            Guard.NotNull(document, nameof(document));

            var mappings = new WireMockOpenApiParser().FromDocument(document, settings);

            return server.WithMapping(mappings.ToArray());
        }
    }
}