/*
┌──────────────────────────────────────────────────────────────────┐
│  Author: Ivan Murzak (https://github.com/IvanMurzak)             │
│  Repository: GitHub (https://github.com/IvanMurzak/Unity-MCP)    │
│  Copyright (c) 2025 Ivan Murzak                                  │
│  Licensed under the Apache License, Version 2.0.                 │
│  See the LICENSE file in the project root for more information.  │
└──────────────────────────────────────────────────────────────────┘
*/

#nullable enable
using System.IO;
using System.Text.Json.Nodes;
using com.IvanMurzak.Unity.MCP.Editor.Utils;
using UnityEngine.UIElements;
using static com.IvanMurzak.McpPlugin.Common.Consts.MCP.Server;

namespace com.IvanMurzak.Unity.MCP.Editor.UI
{
    /// <summary>
    /// Configurator for Visual Studio (Copilot) AI Agent.
    /// </summary>
    public class VisualStudioCopilotConfigurator : AiAgentConfigurator
    {
        public override string AgentName => "Visual Studio (Copilot)";
        public override string AgentId => "vs-copilot";
        public override string DownloadUrl => "https://visualstudio.microsoft.com/downloads/";
        public override string TutorialUrl => "https://www.youtube.com/watch?v=RGdak4T69mc";
        public override string? SkillsPath => ".github/skills";

        protected override string? IconFileName => "visual-studio-64.png";

        private static string LocalConfigPath => Path.Combine(ProjectRootPath, ".vs", "mcp.json");

        protected override AiAgentConfig CreateConfigStdioWindows() => new JsonAiAgentConfig(
            name: AgentName,
            configPath: LocalConfigPath,
            bodyPath: "servers"
        )
        .SetProperty("type", JsonValue.Create("stdio"), requiredForConfiguration: true)
        .SetProperty("command", JsonValue.Create(McpServerManager.ExecutableFullPath.Replace('\\', '/')), requiredForConfiguration: true, comparison: ValueComparisonMode.Path)
        .SetProperty("args", new JsonArray {
            $"{Args.Port}={UnityMcpPluginEditor.Port}",
            $"{Args.PluginTimeout}={UnityMcpPluginEditor.TimeoutMs}",
            $"{Args.ClientTransportMethod}={TransportMethod.stdio}",
            $"{Args.Authorization}={UnityMcpPluginEditor.AuthOption}",
            $"{Args.Token}={UnityMcpPluginEditor.Token}"
        }, requiredForConfiguration: true)
        .SetPropertyToRemove("url");

        protected override AiAgentConfig CreateConfigStdioMacLinux() => new JsonAiAgentConfig(
            name: AgentName,
            configPath: LocalConfigPath,
            bodyPath: "servers"
        )
        .SetProperty("type", JsonValue.Create("stdio"), requiredForConfiguration: true)
        .SetProperty("command", JsonValue.Create(McpServerManager.ExecutableFullPath.Replace('\\', '/')), requiredForConfiguration: true, comparison: ValueComparisonMode.Path)
        .SetProperty("args", new JsonArray {
            $"{Args.Port}={UnityMcpPluginEditor.Port}",
            $"{Args.PluginTimeout}={UnityMcpPluginEditor.TimeoutMs}",
            $"{Args.ClientTransportMethod}={TransportMethod.stdio}",
            $"{Args.Authorization}={UnityMcpPluginEditor.AuthOption}",
            $"{Args.Token}={UnityMcpPluginEditor.Token}"
        }, requiredForConfiguration: true)
        .SetPropertyToRemove("url");

        protected override AiAgentConfig CreateConfigHttpWindows() => new JsonAiAgentConfig(
            name: AgentName,
            configPath: LocalConfigPath,
            bodyPath: "servers"
        )
        .SetProperty("type", JsonValue.Create("http"), requiredForConfiguration: true)
        .SetProperty("url", JsonValue.Create(UnityMcpPluginEditor.Host), requiredForConfiguration: true, comparison: ValueComparisonMode.Url)
        .SetPropertyToRemove("command")
        .SetPropertyToRemove("args");

        protected override AiAgentConfig CreateConfigHttpMacLinux() => new JsonAiAgentConfig(
            name: AgentName,
            configPath: LocalConfigPath,
            bodyPath: "servers"
        )
        .SetProperty("type", JsonValue.Create("http"), requiredForConfiguration: true)
        .SetProperty("url", JsonValue.Create(UnityMcpPluginEditor.Host), requiredForConfiguration: true, comparison: ValueComparisonMode.Url)
        .SetPropertyToRemove("command")
        .SetPropertyToRemove("args");

        protected override void OnUICreated(VisualElement root)
        {
            base.OnUICreated(root);

            ContainerUnderHeader!.Add(TemplateLabelDescription("Visual Studio has integration of GitHub Copilot that operates as AI agent in the IDE."));

            // STDIO Configuration

            ContainerStdio!.Add(TemplateLabelDescription("Visual Studio starts MCP server after the first prompt."));

            var manualStepsContainerStdio = TemplateFoldoutFirst("Manual Configuration Steps");

            manualStepsContainerStdio!.Add(TemplateLabelDescription("1. Open or create file '.vs/mcp.json' in folder of Unity project (this folder must contain 'Assets' folder inside)."));
            manualStepsContainerStdio!.Add(TemplateLabelDescription("2. Copy and paste the configuration json into the file."));
            manualStepsContainerStdio!.Add(TemplateTextFieldReadOnly(ConfigStdio.ExpectedFileContent));

            ContainerStdio!.Add(manualStepsContainerStdio);

            var troubleshootingContainerStdio = TemplateFoldout("Troubleshooting");

            troubleshootingContainerStdio.Add(TemplateLabelDescription("- '.vs/mcp.json' file must have no json syntax errors."));
            troubleshootingContainerStdio.Add(TemplateLabelDescription("- Unity may stay 'Connecting...' until the first prompt sent is processed."));
            troubleshootingContainerStdio.Add(TemplateLabelDescription("- Restart Visual Studio after configuration changes"));

            ContainerStdio!.Add(troubleshootingContainerStdio);

            // HTTP Configuration

            var manualStepsContainerHttp = TemplateFoldoutFirst("Manual Configuration Steps");

            manualStepsContainerHttp!.Add(TemplateLabelDescription("1. Open or create file '.vs/mcp.json' in folder of Unity project (this folder must contain 'Assets' folder inside)."));
            manualStepsContainerHttp!.Add(TemplateLabelDescription("2. Copy and paste the configuration json into the file."));
            manualStepsContainerHttp!.Add(TemplateTextFieldReadOnly(ConfigHttp.ExpectedFileContent));

            ContainerHttp!.Add(manualStepsContainerHttp);

            var troubleshootingContainerHttp = TemplateFoldout("Troubleshooting");

            troubleshootingContainerHttp.Add(TemplateLabelDescription("- '.vs/mcp.json' file must have no json syntax errors."));
            troubleshootingContainerHttp.Add(TemplateLabelDescription("- Unity may stay 'Connecting...' until the first prompt sent is processed."));
            troubleshootingContainerHttp.Add(TemplateLabelDescription("- Restart Visual Studio after configuration changes"));

            ContainerHttp!.Add(troubleshootingContainerHttp);
        }
    }
}