using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Threading.Tasks;

namespace Elwig.Models.Dtos {
    class MemberAreaComsData : DataTable<MemberAreaComsRow> {

        private static readonly (string, string, string?, int)[] FieldNames = [
            ("MgNr", "MgNr.", null, 12),
            ("Name1", "Name", null, 40),
            ("Name2", "Vorname", null, 40),
            ("Address", "Adresse", null, 60),
            ("Plz", "PLZ", null, 10),
            ("Locality", "Ort", null, 60),
            ("SortId", "Sorte", null, 12),
            ("AttrId", "Attribut", null, 16),
            ("CultId", "Bewirt.", null, 16),
            ("GstNr", "Parzelle(n)", null, 25),
            ("Area", "Fläche", "m²", 22),
            ("MinKg", "Lieferpflicht", "kg", 22),
            ("MaxKg", "Lieferrecht", "kg", 22),
        ];

        public MemberAreaComsData(IEnumerable<MemberAreaComsRow> rows, int year) :
            base($"Flächenbindungen", $"Flächenbindungen pro Mitglied {year}", rows, FieldNames) {
        }

        public static async Task<MemberAreaComsData> ForSeason(DbSet<MemberAreaComsRow> table, int year) {
            return new MemberAreaComsData(await FromDbSet(table, year), year);
        }

        private static async Task<IEnumerable<MemberAreaComsRow>> FromDbSet(DbSet<MemberAreaComsRow> table, int year) {
            return await table.FromSql($"""
                    SELECT m.mgnr, m.name AS name_1,
                           COALESCE(m.prefix || ' ', '') || m.given_name ||
                           COALESCE(' ' || m.middle_names, '') || COALESCE(' ' || m.suffix, '') AS name_2,
                           p.plz, o.name AS ort, m.address,
                           t.sortid, t.attrid, c.cultid,
                           c.gstnr, c.area,
                           CAST(ROUND(area * COALESCE(t.min_kg_per_ha, 0) / 10000.0, 0) AS INTEGER) AS min_kg,
                           CAST(ROUND(area * MIN(COALESCE(a.max_kg_per_ha, s.max_kg_per_ha), s.max_kg_per_ha) / 10000.0, 0) AS INTEGER) AS max_kg
                    FROM v_virtual_season s, area_commitment c
                        JOIN area_commitment_type t ON t.vtrgid = c.vtrgid
                        LEFT JOIN wine_attribute a ON a.attrid = t.attrid
                        LEFT JOIN member m ON m.mgnr = c.mgnr
                        LEFT JOIN AT_plz_dest p ON p.id = m.postal_dest
                        LEFT JOIN AT_ort o ON o.okz = p.okz
                    WHERE s.year = {year} AND
                          (year_from IS NULL OR year_from <= s.year) AND
                          (year_to IS NULL OR year_to >= s.year)
                    ORDER BY c.mgnr, t.sortid, t.attrid, c.cultid, c.gstnr;
                    """).ToListAsync();
        }
    }

    [Keyless]
    public class MemberAreaComsRow {
        [Column("mgnr")]
        public int MgNr { get; set; }
        [Column("name_1")]
        public required string Name1 { get; set; }
        [Column("name_2")]
        public string? Name2 { get; set; }
        [Column("address")]
        public required string Address { get; set; }
        [Column("plz")]
        public int Plz { get; set; }
        [Column("ort")]
        public required string Locality { get; set; }
        [Column("sortid")]
        public required string SortId { get; set; }
        [Column("attrid")]
        public string? AttrId { get; set; }
        [Column("cultid")]
        public string? CultId { get; set; }
        [Column("gstnr")]
        public required string GstNr { get; set; }
        [Column("area")]
        public int Area { get; set; }
        [Column("min_kg")]
        public int MinKg { get; set; }
        [Column("max_kg")]
        public int MaxKg { get; set; }
    }
}