using System.Threading;
using System.Threading.Tasks;
using BTCPayServer.Blazor.VaultBridge.Elements;

namespace BTCPayServer.Blazor.VaultBridge;

public abstract class VaultController : IController
{
    protected abstract string VaultUri { get; }
    protected abstract Task Run(VaultBridgeUI ui, VaultClient vaultClient, CancellationToken cancellationToken);

    public async Task Run(VaultBridgeUI ui, CancellationToken cancellationToken)
    {
        try
        {
            ui.ShowFeedback(FeedbackType.Loading, ui.StringLocalizer["Checking BTCPay Server Vault is running..."]);
            var client = new VaultClient(ui.JSRuntime, VaultUri);
            var res = await client.AskPermission(cancellationToken);
            var feedback = (status: res.HttpCode, browser: res.Browser) switch
            {
                (200, _) => new Feedback(ui.StringLocalizer["Access to vault granted by owner."], FeedbackType.Success),
                (401, _) => new Feedback(ui.StringLocalizer["The user declined access to the vault."],
                    FeedbackType.Failed),
                (_, "safari") => new Feedback(
                    ui.ViewLocalizer[
                        "Safari doesn't support BTCPay Server Vault. Please use a different browser. (<a class=\"alert-link\" href=\"https://bugs.webkit.org/show_bug.cgi?id=171934\" target=\"_blank\" rel=\"noreferrer noopener\">More information</a>)"],
                    FeedbackType.Failed),
                _ => new Feedback(
                    ui.ViewLocalizer[
                        "BTCPay Server Vault does not seem to be running, you can download it on <a target=\"_blank\" href=\"https://github.com/btcpayserver/BTCPayServer.Vault/releases/latest\">Github</a>."],
                    FeedbackType.Failed),
            };
            ui.ShowFeedback(feedback);

            if (res.HttpCode != 200)
            {
                if (res.HttpCode == 0 && res.Browser == "brave")
                    ui.AddWarning(ui.ViewLocalizer[
                        "Brave supports BTCPay Server Vault, but you need to disable Brave Shields. (<a class=\"alert-link\" href=\"https://www.updateland.com/how-to-turn-off-brave-shields/\" target=\"_blank\" rel=\"noreferrer noopener\">More information</a>)"]);
                ui.ShowRetry();
                return;
            }

            await Run(ui, client, cancellationToken);
        }
        catch (VaultClient.VaultNotConnectedException)
        {
            ui.ShowFeedback(new Feedback(
                ui.ViewLocalizer[
                    "BTCPay Server Vault does not seem to be running, you can download it on <a target=\"_blank\" href=\"https://github.com/btcpayserver/BTCPayServer.Vault/releases/latest\">Github</a>."],
                FeedbackType.Failed));
            ui.ShowRetry();
        }
    }
}