using UnityEngine;

namespace Ashwild.Settings
{
    /// <summary>
    /// Binds the graphics widgets (quality, vsync, FPS cap, FOV) to the <see cref="SettingsManager"/>.
    /// The panel is the only layer that knows what each widget means: it reads the authored
    /// configuration from the manager's <see cref="SettingsDefinition"/> and initializes each widget
    /// with its data and apply action, then pushes the current value on refresh. The widgets stay
    /// pure UI.
    /// </summary>
    public class GraphicsSettingsSubPanel : SettingsSubPanel
    {
        #region Serialized Fields

        [Header("Widgets")]
        [SerializeField] private SettingDropdownWidget qualityDropdown;
        [SerializeField] private SettingToggleWidget vsyncToggle;
        [SerializeField] private SettingStepperWidget targetFpsStepper;
        [SerializeField] private SettingSliderWidget fovSlider;

        #endregion

        #region Unity Lifecycle

        /// <summary>
        /// Initializes each widget from the definition with the action to apply to the manager.
        /// </summary>
        private void Awake()
        {
            SettingsManager s = SettingsManager.Instance;
            if (s == null || s.Definition == null)
            {
                Debug.LogError($"[GraphicsSettingsSubPanel] SettingsManager/Definition unavailable on '{name}'.", this);
                return;
            }
            SettingsDefinition def = s.Definition;

            qualityDropdown.Init(v => s.SetQualityLevel(v));
            vsyncToggle.Init(v => s.SetVSync(v));
            targetFpsStepper.Init(def.TargetFps.ToWidgetPresets(), false, v => s.SetTargetFps(v));
            fovSlider.Init(def.Fov.Min, def.Fov.Max, def.Fov.LabelScale, def.Fov.LabelFormat, v => s.SetFov(v));
        }

        #endregion

        #region Public API

        /// <summary>
        /// Pushes the manager's current graphics values into the widgets.
        /// </summary>
        public override void Refresh()
        {
            SettingsManager s = SettingsManager.Instance;
            if (s == null) return;

            qualityDropdown.SetOptions(QualitySettings.names);
            qualityDropdown.SetValue(s.QualityLevel);
            vsyncToggle.SetValue(s.VSync);
            targetFpsStepper.SetValue(s.TargetFps);
            fovSlider.SetValue(s.Fov);
        }

        #endregion
    }
}