using System.Text.Json.Serialization;
using MarketAlly.AIPlugin;
using MarketAlly.AIPlugin.Conversation;

namespace MarketAlly.GitCommitEditor.Options;

/// <summary>
/// Model information for display in settings UI
/// </summary>
public sealed class ModelDisplayInfo
{
    public string ModelId { get; init; } = string.Empty;
    public string DisplayName { get; init; } = string.Empty;
    public string Tier { get; init; } = string.Empty;
    public decimal InputCostPer1MTokens { get; init; }
    public decimal OutputCostPer1MTokens { get; init; }
    public string Speed { get; init; } = string.Empty;

    /// <summary>
    /// Formatted display string for picker: "DisplayName (Tier) - $X.XX/1M"
    /// </summary>
    public string FormattedDisplay => $"{DisplayName} ({Tier}) - ${InputCostPer1MTokens:F2}/1M in";

    public override string ToString() => FormattedDisplay;
}

/// <summary>
/// AI configuration options.
/// For provider/model discovery, use IModelProviderService instead of static methods.
/// </summary>
public sealed class AiOptions
{
    [JsonIgnore]
    public string ApiKey { get; set; } = string.Empty;

    /// <summary>
    /// AI Provider: Claude, OpenAI, Gemini, Qwen
    /// </summary>
    public string Provider { get; set; } = "Claude";

    /// <summary>
    /// Model name specific to the provider
    /// </summary>
    public string Model { get; set; } = ModelConstants.Claude.Sonnet4;

    public bool IncludeDiffContext { get; set; } = true;
    public int MaxDiffLines { get; set; } = 200;
    public int MaxTokens { get; set; } = 500;
    public int RateLimitDelayMs { get; set; } = 500;

    /// <summary>
    /// Parses a provider string to AIProvider enum.
    /// </summary>
    public static AIProvider ParseProvider(string? provider)
    {
        return provider?.ToLowerInvariant() switch
        {
            "claude" or "anthropic" => AIProvider.Claude,
            "openai" or "gpt" => AIProvider.OpenAI,
            "gemini" or "google" => AIProvider.Gemini,
            "qwen" or "alibaba" => AIProvider.Qwen,
            _ => AIProvider.Claude
        };
    }
}