using System;
using JoeSiu.Common.Serialization.Runtime;
using TMPro;
using TriInspector;
using UnityEditor;
using UnityEngine;

namespace Common.Timer.Runtime.UI
{
    [ExecuteAlways]
    public class TimerDurationText : MonoBehaviour
    {
        public TMP_Text text;
        [SerializeField]
        private SerializableInterface<ITimer> _timer = new();
#if UNITY_EDITOR
        [ShowIf(nameof(IsStopwatch))]
#endif
        public bool useRemainingTimeForStopwatch = true;
        [Range(0, 15)]
        public int precision = 0;
        [Range(0, 15)]
        public int padLeft = 0;
        [Range(0, 15)]
        public int padRight = 0;

#if UNITY_EDITOR
        private bool IsStopwatch => Timer is IStopwatch;
#endif

        public ITimer Timer
        {
            get => _timer?.Value;
            set => _timer.Value = value;
        }

        private void Reset()
        {
            text = GetComponent<TMP_Text>();
        }

        private void OnValidate()
        {
#if UNITY_EDITOR
            if (!EditorApplication.isPlaying && Selection.Contains(gameObject)) UpdateText(Timer);
#endif
        }

        private void Update()
        {
            UpdateText(Timer);
        }

        public void UpdateText(ITimer timer)
        {
            if (!text) return;
            if (timer == null) return;

            float time;

            if (useRemainingTimeForStopwatch && timer is IStopwatch stopwatch)
            {
                time = stopwatch.RemainingTime;
            }
            else
            {
                time = timer.CurrentTime;
            }

            time = (float)Math.Round(time, precision);
            var timeString = time.ToString();
            // TODO: PadLeft / PadRight doesn't work in all cases (e.g., given time of 1, it can't turn into 01.00)
            // TODO: Use a custom user defined formatter instead?
            if (padLeft > 0) timeString = timeString.PadLeft(padLeft, '0');
            if (padRight > 0) timeString = timeString.PadRight(padRight, '0');
            text.SetText(timeString);
        }
    }
}