using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using CPATapi.Server.Models;
using Dapper;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Data.SqlClient;
using Microsoft.Extensions.Configuration;

namespace CPATapi.Server.Controllers
{
    [Route("[controller]")]
    [ApiController]
    public class SearchController : ControllerBase
    {
        private readonly IConfiguration _config;
        public SearchController(IConfiguration config) => _config = config;

        [HttpGet]
        public async Task<IEnumerable<TapiContact>> SearchAsync([FromQuery] string query)
        {
            if (query == null)
            {
                return new List<TapiContact>();
            }

            var args = Regex.Split(query, "\\s").Where(s => !string.IsNullOrWhiteSpace(s)).Select(s => s.Trim()).ToArray();

            if (args.Length == 0)
            {
                return new List<TapiContact>();
            }

            await using var con = new SqlConnection(_config["Db:ConnectionString"]);
            await con.OpenAsync();
            var sql = new StringBuilder(@"
SELECT TOP 10
TD_ID,
TD_NAME,
TD_NUMBER,
TD_NUMBER_TAPI,
TD_MEDIUM
FROM dbo.CP_TAPI_DIRECTORY
WHERE ");
            var first = true;
            var dp = new DynamicParameters();
            for (var i = 1; i <= args.Length; i++)
            {
                if (!first)
                {
                    sql.AppendLine("AND");
                }
                first = false;
                sql.AppendLine($"(TD_NAME LIKE @s{i} OR");
                sql.AppendLine($" TD_NUMBER_TAPI LIKE @s{i})");
                dp.Add($"s{i}", $"%{args[i-1]}%");
            }

            return await con.QueryAsync<TapiContact>(sql.ToString(), dp);
        }
    }
}