using UnityEngine;
using System.IO;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.HSSF.UserModel;
using TMPro;
using System.Collections.Generic;

public class ExcelToHierarchy : MonoBehaviour
{
    [Header("Excel 设置")]
    public string folderPath = "ExcelData";
    public string fileName = "data.xlsx";

    private void Awake()
    {
        FillFromExcel();
        
    }

    private void FillFromExcel()
    {
        string filePath = Path.Combine(Application.streamingAssetsPath+"/"+ folderPath, fileName);
        if (!File.Exists(filePath))
        {
            Debug.LogWarning($"Excel 文件不存在: {filePath}");
            return;
        }

        IWorkbook workbook;
        using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
        {
            if (Path.GetExtension(fileName).ToLower() == ".xls")
                workbook = new HSSFWorkbook(fs);
            else
                workbook = new XSSFWorkbook(fs);
        }

        string sheetName = gameObject.name; // Sheet 名与挂载物体名一致
        ISheet sheet = workbook.GetSheet(sheetName);
        if (sheet == null)
        {
            Debug.LogWarning($"Sheet 不存在: {sheetName}");
            return;
        }

        for (int i = 0; i <= sheet.LastRowNum; i++)
        {
            IRow row = sheet.GetRow(i);
            if (row == null) continue;

            ICell keyCell = row.GetCell(0);
            ICell valueCell = row.GetCell(1);
            if (keyCell == null || valueCell == null) continue;

            string key = GetCellStringValue(keyCell);
            string value = GetCellStringValue(valueCell);

            Transform target = FindTargetByKey(transform, key);
            if (target != null)
            {
                ApplyValueToChild(target.gameObject, value);
            }
            else
            {
                Debug.LogWarning($"子物体未找到: {key}");
            }
        }

        Debug.Log("Excel 数据填充完成");
    }

    private string GetCellStringValue(ICell cell)
    {
        if (cell == null) return "";
        switch (cell.CellType)
        {
            case CellType.String: return cell.StringCellValue;
            case CellType.Numeric: return cell.NumericCellValue.ToString();
            case CellType.Boolean: return cell.BooleanCellValue.ToString();
            case CellType.Formula:
                if (cell.CachedFormulaResultType == CellType.String)
                    return cell.StringCellValue;
                if (cell.CachedFormulaResultType == CellType.Numeric)
                    return cell.NumericCellValue.ToString();
                return cell.ToString();
            default: return "";
        }
    }

    /// <summary>
    /// 严格匹配 Key，第一段必须是挂载物体名，后续段只查找直接子物体
    /// </summary>
    private Transform FindTargetByKey(Transform root, string key)
    {
        string[] parts = key.Split('-');
        if (parts.Length < 2)
        {
            Debug.LogWarning($"Key 格式不正确（至少挂载物体-子物体）: {key}");
            return null;
        }

        // 第一段必须是挂载物体名
        if (parts[0] != root.name)
            return null;

        Transform current = root;
        // 从第二段开始，每级只在当前物体的直接子物体中查找
        for (int i = 1; i < parts.Length; i++)
        {
            string childName = parts[i];
            Transform found = null;
            foreach (Transform child in current)
            {
                if (child.name == childName)
                {
                    if (child.GetComponent<ReadExlAndSetValue>() != null)
                    {
                        found = null;
                        break;
                    }
                    else
                    {
                        found = child;
                        break;
                    }
                   
                }
            }
            if (found == null) return null; // 没找到
            current = found;
        }

        return current; // 找到目标物体
    }

    /// <summary>
    /// 将 Excel value 填充到对应组件
    /// </summary>
    private void ApplyValueToChild(GameObject go, string value)
    {
        // TMP_InputField 优先
        TMP_InputField tmpInput = go.GetComponent<TMP_InputField>();
        if (tmpInput != null)
        {
            tmpInput.text = value;
            return; // 不再操作子物体
        }

        TMP_Dropdown tmpDropdown = go.GetComponent<TMP_Dropdown>();
        if (tmpDropdown != null)
        {
            string[] options = value.Split('-');
            tmpDropdown.ClearOptions();
            tmpDropdown.AddOptions(new List<string>(options));
            if (options.Length > 0)
            {
                tmpDropdown.value = 0; // 默认选第一个
                tmpDropdown.RefreshShownValue();
            }
            return;
        }

        TMP_Text tmpText = go.GetComponent<TMP_Text>();
        if (tmpText != null)
        {
            tmpText.text = value;
        }
    }
}