using System.Text.RegularExpressions;
using Fake.DependencyInjection;
using Fake.Rbac.Infrastructure;
using Fake.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using Oms.Application.Dtos.Rbac;

namespace Oms.Application.Rbac;

public class UserProfileRepository(FakeRbacDbContext dbContext) : IScopedDependency
{
    /// <summary>
    /// 工号规则：IDE + 至少 3 位数字，如 IDE001。
    /// </summary>
    private static readonly Regex EmployeeNoPattern = new(@"^IDE(\d{3,})$", RegexOptions.IgnoreCase | RegexOptions.Compiled);

    public async Task<UserProfileData?> GetAsync(Guid userId, CancellationToken cancellationToken = default)
    {
        var sql = $@"
            SELECT
              u.`Phone` AS `Phone`,
              u.`EmployeeNo` AS `EmployeeNo`,
              u.`WechatId` AS `WechatId`,
              u.`WechatQrCode` AS `WechatQrCode`,
              u.`WecomKfUrl` AS `WecomKfUrl`
            FROM `{FakeTables.User}` u
            WHERE u.`Id` = {{0}} AND u.`IsDeleted` = 0
            LIMIT 1
            ";
        var row = await dbContext.Database
            .SqlQueryRaw<UserProfileRow>(sql, userId.ToString())
            .FirstOrDefaultAsync(cancellationToken);

        if (row == null)
        {
            return null;
        }

        return new UserProfileData
        {
            Phone = row.Phone,
            EmployeeNo = row.EmployeeNo,
            WechatId = row.WechatId,
            WechatQrCode = row.WechatQrCode,
            WecomKfUrl = row.WecomKfUrl,
        };
    }

    public async Task<Dictionary<Guid, UserProfileData>> GetManyAsync(
        IReadOnlyCollection<Guid> userIds,
        CancellationToken cancellationToken = default)
    {
        if (userIds.Count == 0)
        {
            return [];
        }

        var inClause = string.Join(",", userIds.Select(x => $"'{x}'"));
        var sql = $@"
            SELECT
              u.`Id` AS `UserId`,
              u.`Phone` AS `Phone`,
              u.`EmployeeNo` AS `EmployeeNo`,
              u.`WechatId` AS `WechatId`,
              u.`WechatQrCode` AS `WechatQrCode`,
              u.`WecomKfUrl` AS `WecomKfUrl`
            FROM `{FakeTables.User}` u
            WHERE u.`Id` IN ({inClause}) AND u.`IsDeleted` = 0
            ";

        var rows = await dbContext.Database.SqlQueryRaw<UserProfileListRow>(sql).ToListAsync(cancellationToken);
        return rows.ToDictionary(
            x => x.UserId,
            x => new UserProfileData
            {
                Phone = x.Phone,
                EmployeeNo = x.EmployeeNo,
                WechatId = x.WechatId,
                WechatQrCode = x.WechatQrCode,
                WecomKfUrl = x.WecomKfUrl,
            });
    }

    public async Task SaveAsync(Guid userId, UserProfileData profile, CancellationToken cancellationToken = default)
    {
        var sql = $@"
            UPDATE `{FakeTables.User}`
            SET
              `Phone` = {{1}},
              `EmployeeNo` = {{2}},
              `WechatId` = {{3}},
              `WechatQrCode` = {{4}},
              `WecomKfUrl` = {{5}}
            WHERE `Id` = {{0}} AND `IsDeleted` = 0
            ";
        await dbContext.Database.ExecuteSqlRawAsync(
            sql,
            [
                userId.ToString(),
                // EF Core 参数不接受 DBNull，空值直接传 null 即可映射为 SQL NULL
                (object?)NormalizeOptional(profile.Phone),
                (object?)NormalizeOptional(profile.EmployeeNo),
                (object?)NormalizeOptional(profile.WechatId),
                (object?)NormalizeOptional(profile.WechatQrCode),
                (object?)NormalizeOptional(profile.WecomKfUrl),
            ],
            cancellationToken);
    }

    public async Task UpdateContactAsync(
        Guid userId,
        UserProfileData profile,
        CancellationToken cancellationToken = default)
    {
        var sql = $@"
            UPDATE `{FakeTables.User}`
            SET
              `Phone` = {{1}},
              `WechatId` = {{2}},
              `WechatQrCode` = {{3}},
              `WecomKfUrl` = {{4}}
            WHERE `Id` = {{0}} AND `IsDeleted` = 0
            ";

        await dbContext.Database.ExecuteSqlRawAsync(
            sql,
            [
                userId.ToString(),
                (object?)NormalizeOptional(profile.Phone),
                (object?)NormalizeOptional(profile.WechatId),
                (object?)NormalizeOptional(profile.WechatQrCode),
                (object?)NormalizeOptional(profile.WecomKfUrl),
            ],
            cancellationToken);
    }

    public async Task<bool> IsEmployeeNoTakenAsync(
        string employeeNo,
        Guid? excludeUserId,
        CancellationToken cancellationToken = default)
    {
        var normalized = employeeNo.Trim().ToUpperInvariant();
        var sql = excludeUserId.HasValue
            ? $@"
              SELECT COUNT(*) AS `Value`
              FROM `{FakeTables.User}` u
              WHERE u.`IsDeleted` = 0
                AND u.`EmployeeNo` = {{0}}
                AND u.`Id` <> {{1}}
              "
            : $@"
              SELECT COUNT(*) AS `Value`
              FROM `{FakeTables.User}` u
              WHERE u.`IsDeleted` = 0
                AND u.`EmployeeNo` = {{0}}
              ";

        var count = excludeUserId.HasValue
            ? await dbContext.Database.SqlQueryRaw<long>(sql, normalized, excludeUserId.Value.ToString())
                .FirstAsync(cancellationToken)
            : await dbContext.Database.SqlQueryRaw<long>(sql, normalized).FirstAsync(cancellationToken);

        return count > 0;
    }

    public async Task<string> GenerateNextEmployeeNoAsync(CancellationToken cancellationToken = default)
    {
        var sql = $@"
            SELECT u.`EmployeeNo` AS `EmployeeNo`
            FROM `{FakeTables.User}` u
            WHERE u.`IsDeleted` = 0
              AND u.`EmployeeNo` IS NOT NULL
              AND u.`EmployeeNo` <> ''
            ";

        var rows = await dbContext.Database.SqlQueryRaw<EmployeeNoRow>(sql).ToListAsync(cancellationToken);
        var max = 0;
        foreach (var row in rows)
        {
            var value = row.EmployeeNo?.Trim() ?? string.Empty;
            var match = EmployeeNoPattern.Match(value);
            if (!match.Success)
            {
                continue;
            }

            if (int.TryParse(match.Groups[1].Value, out var number))
            {
                

                max = Math.Max(max, number);
            }
        }

        var next = max + 1;
        return $"IDE{next:D3}";
    }

    public static bool IsValidEmployeeNo(string employeeNo) => EmployeeNoPattern.IsMatch(employeeNo.Trim());

    private static string? NormalizeOptional(string? value)
    {
        if (string.IsNullOrWhiteSpace(value))
        {
            return null;
        }

        return value.Trim();
    }

    private sealed class UserProfileRow
    {
        public string? Phone { get; set; }

        public string? EmployeeNo { get; set; }

        public string? WechatId { get; set; }

        public string? WechatQrCode { get; set; }

        public string? WecomKfUrl { get; set; }
    }

    private sealed class UserProfileListRow
    {
        public Guid UserId { get; set; }

        public string? Phone { get; set; }

        public string? EmployeeNo { get; set; }

        public string? WechatId { get; set; }

        public string? WechatQrCode { get; set; }

        public string? WecomKfUrl { get; set; }
    }

    private sealed class EmployeeNoRow
    {
        public string? EmployeeNo { get; set; }
    }
}