using Volcanic.AgenticCore.Extensions.GoogleCalendar;
using Volcanic.AgenticCore.Features.Processes;

namespace Volcanic.AgenticCore.Telegram;

/// <summary>The Telegram host's process environment: section, <c>PROCESS_ENV_ALLOW</c> and the host's secret values.</summary>
public static class TelegramProcessEnvironment
{
    public const string AllowVariable = "PROCESS_ENV_ALLOW";

    /// <summary>Adds the section's lists, <c>PROCESS_ENV_ALLOW</c>, the bot token, the speech and OpenRouter API keys and the Google client secret to <paramref name="target"/>.</summary>
    public static void Configure(ProcessEnvironmentOptions target, TelegramOptions telegram, ProcessEnvironmentSection section, Func<string, string?> getEnv,
        GoogleCalendarOptions? calendar = null)
    {
        ArgumentNullException.ThrowIfNull(target);
        ArgumentNullException.ThrowIfNull(telegram);
        ArgumentNullException.ThrowIfNull(section);
        ArgumentNullException.ThrowIfNull(getEnv);
        target.Deny.AddRange(section.Deny);
        target.Allow.AddRange(section.Allow);
        if (getEnv(AllowVariable) is { Length: > 0 } allow)
            target.Allow.AddRange(allow.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries));
        target.HardenHostProcess = section.HardenHostProcess;
        if (!string.IsNullOrWhiteSpace(telegram.BotToken)) target.SecretValues.Add(telegram.BotToken);
        if (!string.IsNullOrWhiteSpace(telegram.Speech?.ApiKey)) target.SecretValues.Add(telegram.Speech.ApiKey);
        if (!string.IsNullOrWhiteSpace(telegram.Triggers?.ApiKey)) target.SecretValues.Add(telegram.Triggers.ApiKey);
        if (!string.IsNullOrWhiteSpace(calendar?.ClientSecret)) target.SecretValues.Add(calendar.ClientSecret);
    }

    /// <summary>The startup log line: names only, never values.</summary>
    public static string Describe(ProcessEnvironmentOptions options)
    {
        ArgumentNullException.ThrowIfNull(options);
        return $"Process environment: {options.Deny.Count} deny rules, allow: {(options.Allow.Count == 0 ? "none" : string.Join(", ", options.Allow))}";
    }
}