using CPATapi.Server.Interfaces;
using CPATapi.Server.Models;
using Dapper;

namespace CPATapi.Server.Repository;

internal class ZeitConsensRepository(IConfiguration config) : Repository(config), IZeitConsensRepository
{
    private const string SelectStampsQuery = """
        SELECT
           ma.MA_USER_NAME
          ,bu.LOGGED_IN
          ,us.US_EXTENSION
          ,buLast.LAST_STAMP
          ,buLast.AT_COMPANY
        FROM dbo.MA_DATEN ma
        INNER JOIN projectmanagement.dbo.CP_USER us ON us.US_LOGINNAME = ma.MA_USER_NAME
        OUTER APPLY (
          SELECT COUNT(*) % 2 AS LOGGED_IN
          FROM dbo.BU bu
          WHERE bu.BU_MA_NR = ma.MA_NR
            AND bu.BU_BU >= @from AND bu.BU_BU < @to
        ) bu
        OUTER APPLY (
          SELECT TOP 1
             bu.BU_BU AS LAST_STAMP
            ,CASE WHEN bu.BU_TERM = 'Zeiterfassung' THEN 1 ELSE 0 END AS AT_COMPANY
          FROM dbo.BU bu
          WHERE bu.BU_MA_NR = ma.MA_NR
          ORDER BY bu.BU_BU DESC
        ) buLast
        WHERE
          ma.MA_USER_AKTIV = 1
        """;

    public async Task<IEnumerable<Availability>> GetUsersAvailabilityAsync(DateTime from, DateTime to)
    {
        await using var con = await OpenAsync("ZeitConsens");
        return await con.QueryAsync<Availability>(SelectStampsQuery, new { from, to });
    }

    public async Task<Availability?> GetUserAvailabilityAsync(string user, DateTime from, DateTime to)
    {
        await using var con = await OpenAsync("ZeitConsens");
        return await con.QueryFirstOrDefaultAsync<Availability>($"""
            {SelectStampsQuery}
              AND ma.MA_USER_NAME = @user
            """, new { user, from, to });
    }
}