using System.Globalization;
using System.Text.Json;

namespace Evergreen.Health.Application.Health.Devices.Contracts;

public static class DeviceValues
{
    public static string Text(object? value)
        => value is JsonElement element
            ? (element.ValueKind == JsonValueKind.String ? element.GetString() ?? "" : element.ToString()).Trim()
            : Convert.ToString(value, CultureInfo.InvariantCulture)?.Trim() ?? "";

    public static int Integer(object? value, int minimum, int maximum, string label)
    {
        if (!int.TryParse(Text(value), NumberStyles.Integer, CultureInfo.InvariantCulture, out var number) ||
            number < minimum || number > maximum)
            throw new InvalidOperationException($"{label}应在 {minimum} 到 {maximum} 之间");
        return number;
    }

    public static bool Boolean(object? value)
    {
        if (bool.TryParse(Text(value), out var result)) return result;
        throw new InvalidOperationException("开关参数无效");
    }

    public static string Choice(object? value, IReadOnlyList<string> options, string label)
    {
        var text = Text(value);
        if (!options.Contains(text, StringComparer.Ordinal))
            throw new InvalidOperationException($"{label}选项无效");
        return text;
    }

    public static DeviceParameterDefinition Switch(string key, string entity, string domain, string label)
        => new(key, entity, value => new(label, entity, domain,
            Boolean(value) ? "turn_on" : "turn_off"), label);

    public static DeviceParameterDefinition Number(string key, string entity, int min, int max, string label)
        => new(key, entity, value => new(label, entity, "number", "set_value",
            new Dictionary<string, object?> { ["value"] = Integer(value, min, max, label) }), label, min, max);

    public static DeviceParameterDefinition Select(string key, string entity, IReadOnlyList<string> options, string label,
        bool verify = false, DeviceCommandIntent intent = DeviceCommandIntent.Normal)
        => new(key, entity, value =>
        {
            var option = Choice(value, options, label);
            return new(label, entity, "select", "select_option",
                new Dictionary<string, object?> { ["option"] = option }, verify ? option : null)
                { Intent = option == "无" ? DeviceCommandIntent.Normal : intent };
        }, label, Options: options);
}