using System.Text.Json.Serialization;

namespace AnchorCli.OpenRouter;

/// <summary>
/// Represents the response from OpenRouter's /api/v1/models endpoint.
/// </summary>
internal sealed class ModelsResponse
{
    [JsonPropertyName("data")]
    public List<ModelInfo> Data { get; set; } = [];
}

/// <summary>
/// A single model entry from the OpenRouter API.
/// </summary>
internal sealed class ModelInfo
{
    [JsonPropertyName("id")]
    public string Id { get; set; } = "";

    [JsonPropertyName("name")]
    public string Name { get; set; } = "";

    [JsonPropertyName("pricing")]
    public ModelPricing? Pricing { get; set; }

    [JsonPropertyName("context_length")]
    public int ContextLength { get; set; }
}

/// <summary>
/// Pricing info for a model. All values are USD per token (as strings).
/// </summary>
internal sealed class ModelPricing
{
    /// <summary>USD per input token.</summary>
    [JsonPropertyName("prompt")]
    public string Prompt { get; set; } = "0";

    /// <summary>USD per output token.</summary>
    [JsonPropertyName("completion")]
    public string Completion { get; set; } = "0";

    /// <summary>Fixed USD cost per API request.</summary>
    [JsonPropertyName("request")]
    public string Request { get; set; } = "0";
}