using UnityEngine;

namespace Ashwild.UI
{
    /// <summary>
    /// Authoring container for the rotating quotes shown on the loading screen. A logic-free data
    /// asset (mirrors MusicPlaylist): create one via Assets ▸ Create ▸ UI ▸ Loading Quotes, fill the
    /// list in the inspector, and assign it to the LoadingScreen. Keeping the quotes here lets us add
    /// or reword lines without touching code, and lets the loading screen pick from them at random.
    /// </summary>
    [CreateAssetMenu(fileName = "LoadingQuotes", menuName = "UI/Loading Quotes")]
    public class LoadingQuotes : ScriptableObject
    {
        #region Types

        /// <summary>
        /// A single line shown on the loading screen: the quote itself plus an optional author shown
        /// underneath. Leave the author empty for anonymous lines or plain loading tips.
        /// </summary>
        [System.Serializable]
        public struct Quote
        {
            [TextArea] public string text;
            public string author;
        }

        #endregion

        #region Serialized Fields

        [Header("Quotes")]
        [Tooltip("The pool of quotes the loading screen cycles through at random.")]
        [SerializeField] private Quote[] quotes;

        #endregion

        #region Public API

        /// <summary>
        /// True when at least one quote is authored — guards the loading screen against an empty asset.
        /// </summary>
        public bool HasQuotes => quotes != null && quotes.Length > 0;

        /// <summary>
        /// Number of authored quotes.
        /// </summary>
        public int Count => quotes != null ? quotes.Length : 0;

        /// <summary>
        /// Returns a random quote while avoiding the one at <paramref name="avoidIndex"/> so the same
        /// line never shows twice in a row (unless there is only one quote). Outputs the chosen index
        /// so the caller can feed it back in on the next call.
        /// </summary>
        public Quote GetRandom(int avoidIndex, out int chosenIndex)
        {
            if (!HasQuotes)
            {
                chosenIndex = -1;
                return default;
            }

            if (quotes.Length == 1)
            {
                chosenIndex = 0;
                return quotes[0];
            }

            int index = Random.Range(0, quotes.Length);
            if (index == avoidIndex)
                index = (index + 1) % quotes.Length;

            chosenIndex = index;
            return quotes[index];
        }

        #endregion
    }
}