using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
using UnityEngine;

namespace IdleSpectator;

public sealed class WorldLogEventAuditResult
{
    public bool Passed;
    public string Detail = "";
    public int Total;
    public int MissingAuthored;
    public int OrphanAuthored;
    public int EmptyLabel;
}

/// <summary>
/// Exhaustive live world_log_library audit for authored WorldLog event catalog coverage.
/// </summary>
public static class WorldLogEventHarness
{
    public static WorldLogEventAuditResult RunAudit(string outputDirectory)
    {
        List<string> liveIds = ActivityAssetCatalog.EnumerateLiveWorldLogIds();
        var authored = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
        foreach (string id in EventCatalog.WorldLog.AuthoredIds)
        {
            authored.Add(id);
        }

        int missingAuthored = 0;
        int orphanAuthored = 0;
        int emptyLabel = 0;
        var tsv = new StringBuilder();
        tsv.AppendLine(
            "id\tgroup\tlocale\tpath_icon\tdisaster_link\tauthored\tevent_strength\tcategory\tcreates_interest\tlabel_sample\tnotes");

        var liveSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
        for (int i = 0; i < liveIds.Count; i++)
        {
            string id = liveIds[i];
            liveSet.Add(id);
            WorldLogAsset asset = ActivityAssetCatalog.TryGetWorldLogAsset(id);
            bool hasAuthored = EventCatalog.WorldLog.HasAuthored(id);
            WorldLogEventEntry entry = EventCatalog.WorldLog.GetOrFallback(id);
            if (!hasAuthored || entry.IsFallback)
            {
                missingAuthored++;
            }

            string group = ReadStringField(asset, "group_id")
                           ?? ReadStringField(asset, "history_group")
                           ?? ReadStringField(asset, "group")
                           ?? "";
            string locale = "";
            try
            {
                locale = asset != null ? (asset.getLocaleID() ?? "") : "";
            }
            catch
            {
                locale = ReadStringField(asset, "path_locale") ?? "";
            }

            string pathIcon = ReadStringField(asset, "path_icon") ?? "";
            string disasterLink = ReadStringField(asset, "disaster_id")
                                  ?? ReadStringField(asset, "linked_disaster")
                                  ?? "";
            if (string.IsNullOrEmpty(disasterLink) && id.IndexOf("disaster", StringComparison.OrdinalIgnoreCase) >= 0)
            {
                disasterLink = "id_hint";
            }

            string labelSample = entry.MakeLabel("Alpha", "Beta");
            string emptySlotSample = entry.MakeLabel("", "");
            bool hanging = WorldLogEventEntry.IsHangingLabel(labelSample)
                           || WorldLogEventEntry.IsHangingLabel(emptySlotSample)
                           || string.IsNullOrWhiteSpace(emptySlotSample);
            if (hanging)
            {
                emptyLabel++;
            }

            string notes = "ok";
            if (!hasAuthored || entry.IsFallback)
            {
                notes = "missing_authored";
            }
            else if (hanging)
            {
                notes = "empty_label";
            }

            tsv.Append(id).Append('\t')
                .Append(Escape(group)).Append('\t')
                .Append(Escape(locale)).Append('\t')
                .Append(Escape(pathIcon)).Append('\t')
                .Append(Escape(disasterLink)).Append('\t')
                .Append(hasAuthored ? "1" : "0").Append('\t')
                .Append(entry.EventStrength.ToString("0.#")).Append('\t')
                .Append(Escape(entry.Category)).Append('\t')
                .Append(entry.CreatesInterest ? "1" : "0").Append('\t')
                .Append(Escape(labelSample)).Append('\t')
                .Append(notes).AppendLine();
        }

        foreach (string id in authored)
        {
            if (!liveSet.Contains(id))
            {
                orphanAuthored++;
                tsv.Append(id).Append("\t\t\t\t\t1\t0\t\t0\t\torphan_authored").AppendLine();
            }
        }

        try
        {
            if (!string.IsNullOrEmpty(outputDirectory))
            {
                Directory.CreateDirectory(outputDirectory);
                File.WriteAllText(
                    Path.Combine(outputDirectory, "world-log-event-audit.tsv"),
                    tsv.ToString());
            }
        }
        catch
        {
            // Disk may be unavailable in some harness contexts.
        }

        bool passed = missingAuthored == 0 && orphanAuthored == 0 && emptyLabel == 0;
        return new WorldLogEventAuditResult
        {
            Passed = passed,
            Total = liveIds.Count,
            MissingAuthored = missingAuthored,
            OrphanAuthored = orphanAuthored,
            EmptyLabel = emptyLabel,
            Detail =
                $"total={liveIds.Count} missingAuthored={missingAuthored} orphanAuthored={orphanAuthored} "
                + $"emptyLabel={emptyLabel}"
        };
    }

    public static string DumpDisasterWarInventory(string outputDirectory)
    {
        var tsv = new StringBuilder();
        tsv.AppendLine("kind\tid\tnotes");
        List<string> disasters = ActivityAssetCatalog.EnumerateLiveDisasterIds();
        for (int i = 0; i < disasters.Count; i++)
        {
            tsv.Append("disaster\t").Append(disasters[i]).Append("\tok").AppendLine();
        }

        List<string> warTypes = ActivityAssetCatalog.EnumerateLiveWarTypeIds();
        for (int i = 0; i < warTypes.Count; i++)
        {
            tsv.Append("war_type\t").Append(warTypes[i]).Append("\tok").AppendLine();
        }

        try
        {
            if (!string.IsNullOrEmpty(outputDirectory))
            {
                Directory.CreateDirectory(outputDirectory);
                File.WriteAllText(
                    Path.Combine(outputDirectory, "disaster-war-inventory.tsv"),
                    tsv.ToString());
            }
        }
        catch
        {
            // ignore
        }

        return $"disasters={disasters.Count} war_types={warTypes.Count}";
    }

    private static string ReadStringField(object asset, string fieldName)
    {
        if (asset == null || string.IsNullOrEmpty(fieldName))
        {
            return null;
        }

        try
        {
            FieldInfo field = asset.GetType().GetField(fieldName);
            if (field != null)
            {
                return field.GetValue(asset) as string;
            }

            PropertyInfo prop = asset.GetType().GetProperty(fieldName);
            if (prop != null)
            {
                return prop.GetValue(asset, null) as string;
            }
        }
        catch
        {
            // ignore
        }

        return null;
    }

    private static string Escape(string value)
    {
        if (string.IsNullOrEmpty(value))
        {
            return "";
        }

        return value.Replace('\t', ' ').Replace('\n', ' ').Replace('\r', ' ');
    }
}