using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using CsvHelper;
using CsvHelper.Configuration;
using Sirenix.OdinInspector;
using UnityEngine;

namespace Ichni.Story
{
    public class StorylineSheetReader : SerializedMonoBehaviour
    {
        public TextAsset csvFile;        // 直接拖拽到 Inspector
        public List<StoryBlock> allNodes;

        void Awake() {
            if (csvFile == null) {
                Debug.LogError("请在 Inspector 中指定 CSV TextAsset 文件。");
                return;
            }
            
            allNodes = new List<StoryBlock>();

            using (var reader = new StringReader(csvFile.text)) {
                var config = new CsvConfiguration(CultureInfo.InvariantCulture) {
                    HasHeaderRecord = false,
                    IgnoreBlankLines = true
                };
                
                using (var csv = new CsvReader(reader, config)) {
                    int rowIndex = 0;
                    while (csv.Read()) {
                        for (int col = 0; csv.TryGetField<string>(col, out var cell); col++) {
                            if (!string.IsNullOrWhiteSpace(cell)) {
                                allNodes.Add(new StoryBlock() {
                                    blockName = cell.Trim(),
                                    rowIndex = rowIndex,
                                    timeColumn = col
                                });
                            }
                        }
                        rowIndex++;
                    }
                }
            }
            BuildDependencies();
        }
        
        void BuildDependencies() {
            var groups = allNodes.GroupBy(n => n.rowIndex);
            foreach (var group in groups) {
                var list = group.OrderBy(n => n.timeColumn).ToList();
                for (int i = 1; i < list.Count; i++) {
                    var prev = list[i - 1];
                    var curr = list[i];
                    prev.nextBlock = curr; // 设置前一个单元格的下一个单元格
                    curr.requiredCount++;
                }
            }
        }
    }
    
    
}