using System.Collections.Generic;
using UnityEngine;

namespace Ashwild.Settings
{
    /// <summary>
    /// Authored data for a float setting driven by a <see cref="SettingSliderWidget"/>: its default
    /// value, clamp range, and the label presentation hints the widget needs.
    /// </summary>
    [System.Serializable]
    public struct FloatSetting
    {
        [SerializeField] private float defaultValue;
        [SerializeField] private float min;
        [SerializeField] private float max;
        [Tooltip("Value is multiplied by this before formatting (e.g. 100 to show a 0–1 value as a percentage).")]
        [SerializeField] private float labelScale;
        [Tooltip("Composite format applied to the scaled value, e.g. \"{0:F0}%\" or \"{0:F0}°\".")]
        [SerializeField] private string labelFormat;

        public float DefaultValue => defaultValue;
        public float Min => min;
        public float Max => max;
        public float LabelScale => labelScale;
        public string LabelFormat => labelFormat;
    }

    /// <summary>
    /// One stepper entry: a value plus the text shown for it. Mirrors the (value, label) pair the
    /// <see cref="SettingStepperWidget"/> consumes.
    /// </summary>
    [System.Serializable]
    public struct StepperPreset
    {
        [SerializeField] private int value;
        [SerializeField] private string label;

        public int Value => value;
        public string Label => label;
    }

    /// <summary>
    /// Authored data for a discrete int setting driven by a <see cref="SettingStepperWidget"/>: its
    /// default value and the ordered preset list.
    /// </summary>
    [System.Serializable]
    public struct StepperSetting
    {
        [SerializeField] private int defaultValue;
        [SerializeField] private List<StepperPreset> presets;

        public int DefaultValue => defaultValue;
        public IReadOnlyList<StepperPreset> Presets => presets;

        /// <summary>
        /// Adapts the authored presets to the (value, label) tuples the stepper widget consumes,
        /// keeping the widget decoupled from this settings-data type.
        /// </summary>
        public IReadOnlyList<(int value, string label)> ToWidgetPresets()
        {
            List<(int, string)> result = new List<(int, string)>(presets != null ? presets.Count : 0);
            if (presets != null)
                foreach (StepperPreset preset in presets)
                    result.Add((preset.Value, preset.Label));
            return result;
        }
    }

    /// <summary>
    /// Single source of truth for all authored settings data: per-setting defaults, clamp ranges,
    /// label formatting and the FPS preset list. Read by <see cref="SettingsManager"/> (defaults +
    /// clamps) and by the settings sub-panels (widget configuration), so no magic numbers or UI
    /// hints live in code. Resolution/monitor indices are intentionally absent — they are derived
    /// from the running hardware and resolved at runtime.
    /// </summary>
    [CreateAssetMenu(fileName = "SettingsDefinition", menuName = "Settings/Settings Definition")]
    public class SettingsDefinition : ScriptableObject
    {
        #region Display

        [Header("Display")]
        [SerializeField] private FloatSetting brightness;
        [SerializeField] private FullScreenMode defaultFullscreenMode = FullScreenMode.FullScreenWindow;

        public FloatSetting Brightness => brightness;
        public FullScreenMode DefaultFullscreenMode => defaultFullscreenMode;

        #endregion

        #region Audio

        [Header("Audio")]
        [SerializeField] private FloatSetting masterVolume;
        [SerializeField] private FloatSetting musicVolume;
        [SerializeField] private FloatSetting sfxVolume;

        public FloatSetting MasterVolume => masterVolume;
        public FloatSetting MusicVolume => musicVolume;
        public FloatSetting SfxVolume => sfxVolume;

        #endregion

        #region Graphics

        [Header("Graphics")]
        [Tooltip("-1 keeps the project's current quality level on first run.")]
        [SerializeField] private int defaultQualityLevel = -1;
        [SerializeField] private bool defaultVSync = true;
        [SerializeField] private StepperSetting targetFps;
        [SerializeField] private FloatSetting fov;

        public int DefaultQualityLevel => defaultQualityLevel;
        public bool DefaultVSync => defaultVSync;
        public StepperSetting TargetFps => targetFps;
        public FloatSetting Fov => fov;

        #endregion

        #region Controls

        [Header("Controls")]
        [SerializeField] private FloatSetting sensitivity;
        [SerializeField] private bool defaultInvertY;
        [SerializeField] private bool defaultCrosshairEnabled = true;

        public FloatSetting Sensitivity => sensitivity;
        public bool DefaultInvertY => defaultInvertY;
        public bool DefaultCrosshairEnabled => defaultCrosshairEnabled;

        #endregion
    }
}