using System;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using TakeoutSaaS.Domain.Stores.Entities;
using TakeoutSaaS.Domain.Stores.Enums;
using TakeoutSaaS.Domain.Stores.Repositories;
using TakeoutSaaS.Infrastructure.App.Persistence;

namespace TakeoutSaaS.Infrastructure.App.Repositories;

/// <summary>
/// 门店聚合的 EF Core 仓储实现。
/// </summary>
/// <remarks>
/// 初始化仓储。
/// </remarks>
public sealed class EfStoreRepository(TakeoutAppDbContext context) : IStoreRepository
{
    /// <inheritdoc />
    public Task<Store?> FindByIdAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.Stores
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.Id == storeId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<Store>> GetByMerchantIdAsync(long merchantId, long tenantId, CancellationToken cancellationToken = default)
    {
        return await context.Stores
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.MerchantId == merchantId)
            .OrderBy(x => x.Name)
            .ToListAsync(cancellationToken);
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<Store>> SearchAsync(long tenantId, StoreStatus? status, CancellationToken cancellationToken = default)
    {
        var query = context.Stores
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId);

        if (status.HasValue)
        {
            query = query.Where(x => x.Status == status.Value);
        }

        var stores = await query
            .OrderBy(x => x.Name)
            .ToListAsync(cancellationToken);

        return stores;
    }

    /// <inheritdoc />
    public async Task<Dictionary<long, int>> GetStoreCountsAsync(long? tenantId, IReadOnlyCollection<long> merchantIds, CancellationToken cancellationToken = default)
    {
        if (merchantIds.Count == 0)
        {
            return new Dictionary<long, int>();
        }

        var query = context.Stores.AsNoTracking();
        if (!tenantId.HasValue || tenantId.Value <= 0)
        {
            query = query.IgnoreQueryFilters();
        }
        else
        {
            query = query.Where(x => x.TenantId == tenantId.Value);
        }

        return await query
            .Where(x => merchantIds.Contains(x.MerchantId))
            .GroupBy(x => x.MerchantId)
            .Select(group => new { group.Key, Count = group.Count() })
            .ToDictionaryAsync(x => x.Key, x => x.Count, cancellationToken);
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<StoreBusinessHour>> GetBusinessHoursAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        var hours = await context.StoreBusinessHours
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId)
            .OrderBy(x => x.DayOfWeek)
            .ThenBy(x => x.StartTime)
            .ToListAsync(cancellationToken);

        return hours;
    }

    /// <inheritdoc />
    public Task<StoreBusinessHour?> FindBusinessHourByIdAsync(long businessHourId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StoreBusinessHours
            .Where(x => x.TenantId == tenantId && x.Id == businessHourId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<StoreDeliveryZone>> GetDeliveryZonesAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        var zones = await context.StoreDeliveryZones
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId)
            .OrderBy(x => x.SortOrder)
            .ToListAsync(cancellationToken);

        return zones;
    }

    /// <inheritdoc />
    public Task<StoreDeliveryZone?> FindDeliveryZoneByIdAsync(long deliveryZoneId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StoreDeliveryZones
            .Where(x => x.TenantId == tenantId && x.Id == deliveryZoneId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<StoreHoliday>> GetHolidaysAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        var holidays = await context.StoreHolidays
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId)
            .OrderBy(x => x.Date)
            .ToListAsync(cancellationToken);

        return holidays;
    }

    /// <inheritdoc />
    public Task<StoreHoliday?> FindHolidayByIdAsync(long holidayId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StoreHolidays
            .Where(x => x.TenantId == tenantId && x.Id == holidayId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<StoreTableArea>> GetTableAreasAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        var areas = await context.StoreTableAreas
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId)
            .OrderBy(x => x.SortOrder)
            .ToListAsync(cancellationToken);

        return areas;
    }

    /// <inheritdoc />
    public Task<StoreTableArea?> FindTableAreaByIdAsync(long areaId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StoreTableAreas
            .Where(x => x.TenantId == tenantId && x.Id == areaId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<StoreTable>> GetTablesAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        var tables = await context.StoreTables
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId)
            .OrderBy(x => x.TableCode)
            .ToListAsync(cancellationToken);

        return tables;
    }

    /// <inheritdoc />
    public Task<StoreTable?> FindTableByIdAsync(long tableId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StoreTables
            .Where(x => x.TenantId == tenantId && x.Id == tableId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public Task<StoreTable?> FindTableByCodeAsync(string tableCode, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StoreTables
            .Where(x => x.TenantId == tenantId && x.TableCode == tableCode)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public Task<StorePickupSetting?> GetPickupSettingAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StorePickupSettings
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public Task AddPickupSettingAsync(StorePickupSetting setting, CancellationToken cancellationToken = default)
    {
        return context.StorePickupSettings.AddAsync(setting, cancellationToken).AsTask();
    }

    /// <inheritdoc />
    public Task UpdatePickupSettingAsync(StorePickupSetting setting, CancellationToken cancellationToken = default)
    {
        context.StorePickupSettings.Update(setting);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<StorePickupSlot>> GetPickupSlotsAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        var slots = await context.StorePickupSlots
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId)
            .OrderBy(x => x.StartTime)
            .ToListAsync(cancellationToken);
        return slots;
    }

    /// <inheritdoc />
    public Task<StorePickupSlot?> FindPickupSlotByIdAsync(long slotId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StorePickupSlots
            .Where(x => x.TenantId == tenantId && x.Id == slotId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public Task AddPickupSlotsAsync(IEnumerable<StorePickupSlot> slots, CancellationToken cancellationToken = default)
    {
        return context.StorePickupSlots.AddRangeAsync(slots, cancellationToken);
    }

    /// <inheritdoc />
    public Task UpdatePickupSlotAsync(StorePickupSlot slot, CancellationToken cancellationToken = default)
    {
        context.StorePickupSlots.Update(slot);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public async Task<IReadOnlyList<StoreEmployeeShift>> GetShiftsAsync(long storeId, long tenantId, DateTime? from = null, DateTime? to = null, CancellationToken cancellationToken = default)
    {
        var query = context.StoreEmployeeShifts
            .AsNoTracking()
            .Where(x => x.TenantId == tenantId && x.StoreId == storeId);

        if (from.HasValue)
        {
            query = query.Where(x => x.ShiftDate >= from.Value.Date);
        }

        if (to.HasValue)
        {
            query = query.Where(x => x.ShiftDate <= to.Value.Date);
        }

        var shifts = await query
            .OrderBy(x => x.ShiftDate)
            .ThenBy(x => x.StartTime)
            .ToListAsync(cancellationToken);

        return shifts;
    }

    /// <inheritdoc />
    public Task<StoreEmployeeShift?> FindShiftByIdAsync(long shiftId, long tenantId, CancellationToken cancellationToken = default)
    {
        return context.StoreEmployeeShifts
            .Where(x => x.TenantId == tenantId && x.Id == shiftId)
            .FirstOrDefaultAsync(cancellationToken);
    }

    /// <inheritdoc />
    public Task AddStoreAsync(Store store, CancellationToken cancellationToken = default)
    {
        return context.Stores.AddAsync(store, cancellationToken).AsTask();
    }

    /// <inheritdoc />
    public Task AddBusinessHoursAsync(IEnumerable<StoreBusinessHour> hours, CancellationToken cancellationToken = default)
    {
        return context.StoreBusinessHours.AddRangeAsync(hours, cancellationToken);
    }

    /// <inheritdoc />
    public Task UpdateBusinessHourAsync(StoreBusinessHour hour, CancellationToken cancellationToken = default)
    {
        context.StoreBusinessHours.Update(hour);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public Task AddDeliveryZonesAsync(IEnumerable<StoreDeliveryZone> zones, CancellationToken cancellationToken = default)
    {
        return context.StoreDeliveryZones.AddRangeAsync(zones, cancellationToken);
    }

    /// <inheritdoc />
    public Task UpdateDeliveryZoneAsync(StoreDeliveryZone zone, CancellationToken cancellationToken = default)
    {
        context.StoreDeliveryZones.Update(zone);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public Task AddHolidaysAsync(IEnumerable<StoreHoliday> holidays, CancellationToken cancellationToken = default)
    {
        return context.StoreHolidays.AddRangeAsync(holidays, cancellationToken);
    }

    /// <inheritdoc />
    public Task UpdateHolidayAsync(StoreHoliday holiday, CancellationToken cancellationToken = default)
    {
        context.StoreHolidays.Update(holiday);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public Task AddTableAreasAsync(IEnumerable<StoreTableArea> areas, CancellationToken cancellationToken = default)
    {
        return context.StoreTableAreas.AddRangeAsync(areas, cancellationToken);
    }

    /// <inheritdoc />
    public Task UpdateTableAreaAsync(StoreTableArea area, CancellationToken cancellationToken = default)
    {
        context.StoreTableAreas.Update(area);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public Task AddTablesAsync(IEnumerable<StoreTable> tables, CancellationToken cancellationToken = default)
    {
        return context.StoreTables.AddRangeAsync(tables, cancellationToken);
    }

    /// <inheritdoc />
    public Task UpdateTableAsync(StoreTable table, CancellationToken cancellationToken = default)
    {
        context.StoreTables.Update(table);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public Task AddShiftsAsync(IEnumerable<StoreEmployeeShift> shifts, CancellationToken cancellationToken = default)
    {
        return context.StoreEmployeeShifts.AddRangeAsync(shifts, cancellationToken);
    }

    /// <inheritdoc />
    public Task UpdateShiftAsync(StoreEmployeeShift shift, CancellationToken cancellationToken = default)
    {
        context.StoreEmployeeShifts.Update(shift);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public Task SaveChangesAsync(CancellationToken cancellationToken = default)
    {
        return context.SaveChangesAsync(cancellationToken);
    }

    /// <inheritdoc />
    public async Task DeleteBusinessHourAsync(long businessHourId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.StoreBusinessHours
            .Where(x => x.TenantId == tenantId && x.Id == businessHourId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing != null)
        {
            context.StoreBusinessHours.Remove(existing);
        }
    }

    /// <inheritdoc />
    public async Task DeleteDeliveryZoneAsync(long deliveryZoneId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.StoreDeliveryZones
            .Where(x => x.TenantId == tenantId && x.Id == deliveryZoneId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing != null)
        {
            context.StoreDeliveryZones.Remove(existing);
        }
    }

    /// <inheritdoc />
    public async Task DeleteHolidayAsync(long holidayId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.StoreHolidays
            .Where(x => x.TenantId == tenantId && x.Id == holidayId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing != null)
        {
            context.StoreHolidays.Remove(existing);
        }
    }

    /// <inheritdoc />
    public async Task DeleteTableAreaAsync(long areaId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.StoreTableAreas
            .Where(x => x.TenantId == tenantId && x.Id == areaId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing != null)
        {
            context.StoreTableAreas.Remove(existing);
        }
    }

    /// <inheritdoc />
    public async Task DeleteTableAsync(long tableId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.StoreTables
            .Where(x => x.TenantId == tenantId && x.Id == tableId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing != null)
        {
            context.StoreTables.Remove(existing);
        }
    }

    /// <inheritdoc />
    public async Task DeletePickupSlotAsync(long slotId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.StorePickupSlots
            .Where(x => x.TenantId == tenantId && x.Id == slotId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing != null)
        {
            context.StorePickupSlots.Remove(existing);
        }
    }

    /// <inheritdoc />
    public async Task DeleteShiftAsync(long shiftId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.StoreEmployeeShifts
            .Where(x => x.TenantId == tenantId && x.Id == shiftId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing != null)
        {
            context.StoreEmployeeShifts.Remove(existing);
        }
    }

    /// <inheritdoc />
    public Task UpdateStoreAsync(Store store, CancellationToken cancellationToken = default)
    {
        context.Stores.Update(store);
        return Task.CompletedTask;
    }

    /// <inheritdoc />
    public async Task DeleteStoreAsync(long storeId, long tenantId, CancellationToken cancellationToken = default)
    {
        var existing = await context.Stores
            .Where(x => x.TenantId == tenantId && x.Id == storeId)
            .FirstOrDefaultAsync(cancellationToken);

        if (existing == null)
        {
            return;
        }

        context.Stores.Remove(existing);
    }
}