using System.Globalization;
using System.Security.Cryptography;
using System.Text.Json;
using Admin.NET.Plugin.AiDOP.Entity.DataPlatform;

namespace Admin.NET.Plugin.AiDOP.DataPlatform.FileImport;

public static class MdpExcelValidation
{
    public static Dictionary<string, object?> MapRow(
        IReadOnlyDictionary<string, object?> raw,
        IReadOnlyList<MdpFieldMapping> mappings)
    {
        var mapped = new Dictionary<string, object?>(StringComparer.OrdinalIgnoreCase);
        foreach (var map in mappings.OrderBy(x => x.SortOrder))
        {
            if (map.TargetField.Equals("tenant_id", StringComparison.OrdinalIgnoreCase))
                continue;
            raw.TryGetValue(map.SourceField, out var val);
            if ((val == null || val is DBNull || string.IsNullOrWhiteSpace(Convert.ToString(val)))
                && !string.IsNullOrWhiteSpace(map.DefaultValue))
                val = map.DefaultValue;
            if (map.IsRequired == 1 && (val == null || string.IsNullOrWhiteSpace(Convert.ToString(val))))
                throw new InvalidOperationException($"必填列 {map.SourceField} 为空");
            var text = Convert.ToString(val, CultureInfo.InvariantCulture);
            MdpFileImportSecurity.EnsureCell(text);
            mapped[map.TargetField] = val;
        }
        MdpFileImportSecurity.StripClientTenant(mapped);
        return mapped;
    }

    public static string BusinessKey(string? expr, IDictionary<string, object?> mapped)
    {
        if (string.IsNullOrWhiteSpace(expr))
            throw new InvalidOperationException("实体未配置业务键");
        var parts = expr.Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);
        var vals = new List<string>();
        foreach (var p in parts)
        {
            if (!mapped.TryGetValue(p, out var v) || v == null || string.IsNullOrWhiteSpace(Convert.ToString(v)))
                throw new InvalidOperationException($"业务键 {p} 为空");
            vals.Add(Convert.ToString(v, CultureInfo.InvariantCulture)!.Trim());
        }
        return string.Join("|", vals);
    }

    public static string RowHash(IDictionary<string, object?> mapped)
    {
        var json = JsonSerializer.Serialize(mapped.OrderBy(x => x.Key, StringComparer.OrdinalIgnoreCase)
            .ToDictionary(x => x.Key, x => x.Value?.ToString()));
        var bytes = SHA256.HashData(System.Text.Encoding.UTF8.GetBytes(json));
        return Convert.ToHexString(bytes).ToLowerInvariant();
    }

    public static bool IsPullStage(string? stageType, string? stepCode)
    {
        var t = (stageType ?? stepCode ?? string.Empty).Trim().ToUpperInvariant();
        return t is "PULL" or "EXTRACT" or "INBOUND" or "SYNC_STAGING";
    }
}