namespace Admin.NET.Plugin.AiDOP.Universal;

/// <summary>
/// 通用客户选择服务 🏢
/// 路由前缀：/api/Universal
/// </summary>
[ApiDescriptionSettings(Order = 280, Description = "通用-客户选择")]
[Route("api/Universal")]
[AllowAnonymous]
[NonUnify]
public class UniversalCustomerService : IDynamicApiController, ITransient
{
    private readonly ISqlSugarClient _db;

    public UniversalCustomerService(ISqlSugarClient db)
    {
        _db = db;
    }

    // 允许排序的字段白名单（key=前端 prop，value=数据库列名）
    private static readonly Dictionary<string, string> _sortFieldMap =
        new(StringComparer.OrdinalIgnoreCase)
        {
            ["cust"]     = "Cust",
            ["sortname"] = "SortName",
        };

    /// <summary>获取客户选择分页列表 🏢</summary>
    [DisplayName("获取客户选择列表")]
    [HttpGet("customer/page")]
    public async Task<object> GetCustomerPage([FromQuery] CustomerPageInput input)
    {
        var conditions = new List<string>();
        var pars = new List<SugarParameter>();

        if (!string.IsNullOrWhiteSpace(input.CustNo))
        {
            conditions.Add("Cust LIKE @CustNo");
            pars.Add(new SugarParameter("@CustNo", $"%{input.CustNo.Trim()}%"));
        }
        if (!string.IsNullOrWhiteSpace(input.SortName))
        {
            conditions.Add("SortName LIKE @SortName");
            pars.Add(new SugarParameter("@SortName", $"%{input.SortName.Trim()}%"));
        }

        var where = conditions.Count > 0 ? string.Join(" AND ", conditions) : "1=1";

        var dbSortField = _sortFieldMap.TryGetValue(input.SortField ?? "", out var mapped) ? mapped : "Cust";
        var sortOrder = string.Equals(input.SortOrder, "desc", StringComparison.OrdinalIgnoreCase) ? "DESC" : "ASC";

        var offset = (input.Page - 1) * input.PageSize;
        var total = await _db.Ado.GetIntAsync(
            $"SELECT COUNT(*) FROM CustMaster WHERE {where}", pars);
        var list = await _db.Ado.SqlQueryAsync<CustomerRow>(
            $"SELECT Cust, SortName, recid AS Id FROM CustMaster WHERE {where} ORDER BY {dbSortField} {sortOrder} LIMIT {input.PageSize} OFFSET {offset}",
            pars);

        return new { total, page = input.Page, pageSize = input.PageSize, list };
    }

    // ──────────────── 内部结果映射 ────────────────

    private sealed class CustomerRow
    {
        public string? Cust { get; set; }
        public string? SortName { get; set; }
        public string? Id { get; set; }
    }
}

/// <summary>客户选择分页查询入参</summary>
public class CustomerPageInput
{
    public int Page { get; set; } = 1;
    public int PageSize { get; set; } = 10;

    /// <summary>客户编号（模糊）</summary>
    public string? CustNo { get; set; }

    /// <summary>客户名称（模糊）</summary>
    public string? SortName { get; set; }

    /// <summary>排序字段（前端 prop 名）</summary>
    public string? SortField { get; set; }

    /// <summary>排序方向：asc / desc</summary>
    public string? SortOrder { get; set; }
}