using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEditor.Build;
using UnityEditor.Build.Reporting;
using UnityEngine;

namespace BaseGames.Editor
{
    /// <summary>
    /// 扫描项目中所有实现 <see cref="BaseGames.Core.IValidatable"/> 接口的 ScriptableObject，
    /// 调用 Validate() 并在 Console 报告验证结果。同时作为构建前处理器，发现错误时中止构建。
    ///
    /// 菜单：Tools/Validate All ScriptableObjects
    /// Build 回调顺序 = 1（在 AddressKeyValidator callbackOrder = 0 之后执行）
    /// </summary>
    public class SOValidationRunner : IPreprocessBuildWithReport
    {
        public int callbackOrder => 1;

        public void OnPreprocessBuild(BuildReport report)
        {
            var (errors, warnings) = RunAll();

            foreach (var w in warnings)
                Debug.LogWarning(w);

            if (errors.Count > 0)
                throw new BuildFailedException(
                    $"[SOValidationRunner] {errors.Count} 处 SO 数据错误，构建中止：\n"
                    + string.Join("\n", errors));
        }

        [MenuItem("Tools/Validate All ScriptableObjects")]
        public static void ValidateMenu()
        {
            var (errors, warnings) = RunAll();

            if (errors.Count == 0 && warnings.Count == 0)
            {
                Debug.Log("[SOValidationRunner] ✅ 所有 SO 数据均合法。");
                return;
            }

            foreach (var w in warnings) Debug.LogWarning(w);
            foreach (var e in errors)   Debug.LogError(e);

            Debug.Log($"[SOValidationRunner] 校验完成：{errors.Count} 错误，{warnings.Count} 警告。");
        }

        // ── Internal ──────────────────────────────────────────────────────

        private static (List<string> errors, List<string> warnings) RunAll()
        {
            var errors   = new List<string>();
            var warnings = new List<string>();

            var guids = AssetDatabase.FindAssets("t:ScriptableObject");
            foreach (var guid in guids)
            {
                var path = AssetDatabase.GUIDToAssetPath(guid);
                var so   = AssetDatabase.LoadAssetAtPath<ScriptableObject>(path);
                if (so is BaseGames.Core.IValidatable validatable)
                {
                    foreach (var result in validatable.Validate())
                    {
                        if (result.Severity == BaseGames.Core.ValidationSeverity.Error)
                            errors.Add($"\u274c {result.Message}  ({path})");
                        else
                            warnings.Add($"\u26a0\ufe0f {result.Message}  ({path})");
                    }
                }
            }

            return (errors, warnings);
        }
    }
}