using AIStudio.Settings;
using AIStudio.Tools.DataBackup;
using AIStudio.Tools.PluginSystem;
using AIStudio.Tools.Rust;
using AIStudio.Tools.Services;

using Microsoft.AspNetCore.Components;

namespace AIStudio.Components;

/// <summary>
/// Shows the data and configuration folders of AI Studio, and which of their contents belong into a backup.
/// </summary>
/// <remarks>
/// For users who back up their computer with a tool of their own. Everything shown here comes from
/// the same list the backups of AI Studio follow. It stays complete even when the organization does not
/// allow backups within AI Studio: that decides about the backups AI Studio makes, not about which
/// folders a user may copy.
/// </remarks>
public partial class DataFolders : MSGComponentBase
{
    private static readonly DataBackupLocation[] LOCATIONS = [DataBackupLocation.DATA_DIRECTORY, DataBackupLocation.CONFIG_DIRECTORY];

    private static readonly IReadOnlyList<DataBackupEntry> INCLUDED_ENTRIES = DataBackupContents.ENTRIES.Where(entry => entry.IsIncluded).ToList();

    private static readonly IReadOnlyList<DataBackupEntry> EXCLUDED_ENTRIES = DataBackupContents.ENTRIES.Where(entry => !entry.IsIncluded).ToList();

    [Inject]
    private RustService RustService { get; init; } = null!;

    [Inject]
    private ILogger<DataFolders> Logger { get; init; } = null!;

    /// <summary>
    /// Tells everybody but experts where to go instead.
    /// </summary>
    /// <remarks>
    /// Pointing to the backups of AI Studio makes sense only while the organization allows them.
    /// </remarks>
    private string ExpertNotice
    {
        get
        {
            var notice = T("The following is meant for experts who back up their computer with a tool of their own.");
            return this.SettingsManager.ConfigurationData.App.AllowUserToBackUpData
                ? $"{notice} {T("To back up your data with AI Studio itself, or to move it to another computer, use Data Backup & Restore on this page or in the settings instead.")}"
                : notice;
        }
    }

    private static bool IsDataFolderInsideConfigFolder =>!string.IsNullOrWhiteSpace(SettingsManager.ConfigDirectory)
                                                          && !string.IsNullOrWhiteSpace(SettingsManager.DataDirectory)
                                                          && PathTools.IsInsideDirectory(SettingsManager.ConfigDirectory, SettingsManager.DataDirectory);

    /// <summary>
    /// The plugins which the organization deployed among the user's own ones, as AI Studio found them when it loaded the plugins last.
    /// </summary>
    private static IReadOnlyList<string> OrganizationPluginFolders => string.IsNullOrWhiteSpace(SettingsManager.DataDirectory)
        ? []
        : DataBackupContents.FindOrganizationPluginsAmongUserPlugins(PluginFactory.AvailablePlugins.OfType<IAvailablePlugin>(), SettingsManager.DataDirectory);

    private static string FolderPath(DataBackupLocation location) => location switch
    {
        DataBackupLocation.DATA_DIRECTORY => SettingsManager.DataDirectory ?? string.Empty,
        DataBackupLocation.CONFIG_DIRECTORY => SettingsManager.ConfigDirectory ?? string.Empty,
        _ => string.Empty,
    };

    private string FolderName(DataBackupLocation location) => location switch
    {
        DataBackupLocation.DATA_DIRECTORY => T("Data folder"),
        DataBackupLocation.CONFIG_DIRECTORY => T("Configuration folder"),
        _ => string.Empty,
    };

    private string Describe(DataBackupEntryKind kind) => kind switch
    {
        DataBackupEntryKind.SETTINGS => T("Your settings."),
        DataBackupEntryKind.WORKSPACES => T("Your chats in workspaces, along with their transcripts."),
        DataBackupEntryKind.TEMPORARY_CHATS => T("Your temporary chats, along with their transcripts."),
        DataBackupEntryKind.PLUGINS => T("Your plugins, such as the assistants you built, apart from the folders listed below."),
        DataBackupEntryKind.TOKENIZERS => T("The tokenizers you chose for your providers."),
        DataBackupEntryKind.VISUAL_BRIEFINGS => T("Your projects in the Visual Briefing Assistant."),
        DataBackupEntryKind.DATA_SOURCE_INDEX => T("The index of your local data sources: which files AI Studio embedded, and their text."),
        DataBackupEntryKind.VECTOR_STORES => T("The embeddings of your local data sources."),

        DataBackupEntryKind.SETTINGS_OF_OTHER_VERSIONS => T("Copies of your settings, which every version of AI Studio keeps for itself. Your current settings are all a backup needs."),
        DataBackupEntryKind.BUILT_IN_PLUGINS => T("Plugins which come with AI Studio, such as the language packs. AI Studio brings them back by itself."),
        DataBackupEntryKind.ORGANIZATION_PLUGINS => T("Plugins of your organization. Your organization brings them back."),
        DataBackupEntryKind.TEMPORARY_FILES => T("Files which AI Studio needs only for a moment and deletes again."),
        DataBackupEntryKind.DOWNLOADED_TOOLS => T("Tools which AI Studio downloaded for this OS, such as Pandoc. On another computer, AI Studio downloads them again."),
        DataBackupEntryKind.INTERFACE_KEYS => T("Keys with which AI Studio protects data in its user interface. Only the Flatpak keeps them here, and on another computer, AI Studio creates new ones."),
        DataBackupEntryKind.LOGS => T("Log files. They help when something goes wrong, but they hold none of your data."),

        _ => string.Empty,
    };

    private async Task CopyPath(string path) => await this.RustService.CopyText2Clipboard(path);

    private async Task OpenInFileManager(string path)
    {
        if (string.IsNullOrWhiteSpace(path))
        {
            await this.MessageBus.SendWarning(new(Icons.Material.Filled.Folder, T("The folder is not known yet.")));
            return;
        }

        OpenPathResponse response;
        try
        {
            response = await this.RustService.TryOpenPathInRuntimeFileManager(path);
        }
        catch (Exception e)
        {
            this.Logger.LogWarning(e, "Could not open the folder '{Path}' in the file manager.", path);
            await this.MessageBus.SendError(new(Icons.Material.Filled.Folder, T("Could not open the folder.")));
            return;
        }

        if (response.Success)
            return;

        var issue = string.IsNullOrWhiteSpace(response.Issue) ? T("Unknown error") : response.Issue;
        await this.MessageBus.SendError(new(Icons.Material.Filled.Folder, string.Format(T("Could not open the folder: {0}"), issue)));
    }
}