using Data.SeaHavenIndustries;
using Microsoft.EntityFrameworkCore;
using SeaHaven.DataServices.Dto;
using SeaHaven.DataServices.Interfaces;

namespace SeaHaven.DataServices.Implementation
{
    public class UserDataService : IUserDataService
    {
        private readonly ApplicationDbContext _context;

        public UserDataService(ApplicationDbContext context)
        {
            _context = context;
        }

        public async Task<ApplicationUser?> GetByIdAsync(string id)
        {
            return await _context.Users.FindAsync(id);
        }

        public async Task<IEnumerable<ApplicationUser>> GetAllAsync()
        {
            return await _context.Users.ToListAsync();
        }

        public async Task<ApplicationUser?> GetByEmailAsync(string email)
        {
            return await _context.Users
                .FirstOrDefaultAsync(u => u.Email == email);
        }

        public async Task<bool> ExistsAsync(string id)
        {
            return await _context.Users.AnyAsync(u => u.Id == id);
        }

        public async Task<IReadOnlyList<UserListRowData>> GetAllForListAsync(CancellationToken cancellationToken)
        {
            return await _context.Users
                .AsNoTracking()
                .Select(user => new UserListRowData
                {
                    Id = user.Id,
                    RoleName = user.PhoneNumber,
                    Email = user.Email,
                    Name = user.FirstName,
                    CreatedDate = user.CreatedDate,
                    Status = user.UniqueName
                })
                .ToListAsync(cancellationToken);
        }

        public async Task<UserProfileData?> GetProfileAsync(string id, CancellationToken cancellationToken)
        {
            return await _context.Users
                .AsNoTracking()
                .Where(u => u.Id == id)
                .Select(user => new UserProfileData
                {
                    Id = user.Id,
                    FirstName = user.FirstName,
                    Email = user.Email,
                    Contact = user.Contact,
                    CreatedDate = user.CreatedDate
                })
                .FirstOrDefaultAsync(cancellationToken);
        }

        public async Task<bool> UpdateProfileAsync(
            string id,
            string? name,
            string? email,
            string? contact,
            CancellationToken cancellationToken)
        {
            var updated = await _context.Users
                .Where(user => user.Id == id)
                .ExecuteUpdateAsync(
                    setters => setters
                        .SetProperty(user => user.FirstName, name)
                        .SetProperty(user => user.Email, email)
                        .SetProperty(user => user.Contact, contact),
                    cancellationToken);

            return updated == 1;
        }

        public async Task<ApplicationUser?> GetForEditAsync(string id, CancellationToken cancellationToken)
        {
            return await _context.Users
                .Where(w => w.Id == id)
                .FirstOrDefaultAsync(cancellationToken);
        }

        public async Task<ApplicationUser?> GetByEmailNormalizedAsync(string email, CancellationToken cancellationToken)
        {
            var normalizedEmail = email.Trim().ToUpperInvariant();
            return await _context.Users
                .AsNoTracking()
                .Where(user => user.NormalizedEmail == normalizedEmail)
                .FirstOrDefaultAsync(cancellationToken);
        }

        public async Task UpdateUserAsync(ApplicationUser user, CancellationToken cancellationToken)
        {
            _context.Users.Update(user);
            await _context.SaveChangesAsync(cancellationToken);
        }

        public async Task DeleteUserWithCascadeAsync(ApplicationUser user, CancellationToken cancellationToken)
        {
            var id = user.Id;
            await using var transaction = await _context.Database.BeginTransactionAsync(cancellationToken);

            await _context.workOrders
                .Where(workOrder => workOrder.AssignTo == id)
                .ExecuteUpdateAsync(
                    setters => setters.SetProperty(workOrder => workOrder.AssignTo, (string?)null),
                    cancellationToken);

            await _context.Comments
                .Where(comment => comment.UserId == id)
                .ExecuteUpdateAsync(
                    setters => setters.SetProperty(comment => comment.UserId, (string?)null),
                    cancellationToken);

            await _context.Templates
                .Where(template => template.AssignTo == id)
                .ExecuteUpdateAsync(
                    setters => setters.SetProperty(template => template.AssignTo, (string?)null),
                    cancellationToken);

            await _context.UserRoles
                .Where(role => role.UserId == id)
                .ExecuteDeleteAsync(cancellationToken);

            await _context.Users
                .Where(existingUser => existingUser.Id == id)
                .ExecuteDeleteAsync(cancellationToken);

            await transaction.CommitAsync(cancellationToken);
        }

        public async Task<string?> GetEmailByIdAsync(
            string userId, CancellationToken cancellationToken)
        {
            return await _context.Users
                .AsNoTracking()
                .Where(user => user.Id == userId)
                .Select(user => user.Email)
                .FirstOrDefaultAsync(cancellationToken);
        }
    }
}