using System.Net;
using System.Text.Json;
using Marco.Pms.DataAccess.Data;
using Marco.Pms.Model.Dtos.Tenant;
using Marco.Pms.Model.Employees;
using Marco.Pms.Model.Entitlements;
using Marco.Pms.Model.Mapper;
using Marco.Pms.Model.Utilities;
using Marco.Pms.Model.ViewModels.Tenant;
using MarcoBMS.Services.Service;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace Marco.Pms.Services.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class TenantController : ControllerBase
    {
        private readonly string jsonString = System.IO.File.ReadAllText("Data/RolesCofiguration.json");
        private readonly ApplicationDbContext _context;
        private readonly UserManager<IdentityUser> _userManager;
        private readonly ILoggingService _logger;
        private readonly IEmailSender _emailSender;
        private readonly IConfiguration _configuration;
        public TenantController(ApplicationDbContext context, UserManager<IdentityUser> userManager, ILoggingService logger, IEmailSender emailSender, IConfiguration configuration)
        {
            _context = context;
            _userManager = userManager;
            _logger = logger;
            _emailSender = emailSender;
            _configuration = configuration;
        }
        [HttpPost]
        public async Task<IActionResult> CreateTenant([FromForm] CreateTenantDto createTenantDto)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }
            var existedUser = await _context.ApplicationUsers.FirstOrDefaultAsync(u => u.Email == createTenantDto.Email && u.IsActive == true);
            var existedTenanat = await _context.Tenants.FirstOrDefaultAsync(t => t.Name == createTenantDto.OrganizatioinName);
            if (existedUser == null && existedTenanat == null)
            {
                var transaction = _context.Database.BeginTransaction();
                Tenant newTenant = createTenantDto.CreateDtoToTenant();
                _context.Tenants.Add(newTenant);
                await _context.SaveChangesAsync();

                //Tenant? tenant = await _context.Tenants.FirstOrDefaultAsync(t => t.Name == newTenant.Name);

                if (newTenant != null)
                {
                    RoleConfiguration settings = JsonSerializer.Deserialize<RoleConfiguration>(jsonString) ?? new RoleConfiguration();
                    var TenantId = newTenant.Id;
                    JobRole jobRole = new JobRole
                    {
                        Name = settings.JobRoleName,
                        Description = settings.JobRoleDescription,
                        TenantId = TenantId
                    };

                    ApplicationRole role = new ApplicationRole
                    {
                        Role = settings.RoleName,
                        Description = settings.RoleDescription,
                        TenantId = TenantId
                    };

                    _context.JobRoles.Add(jobRole);
                    _context.ApplicationRoles.Add(role);
                    await _context.SaveChangesAsync();


                    List<FeaturePermission> permissions = await _context.FeaturePermissions.AsNoTracking().ToListAsync();
                    List<RolePermissionMappings> rolePermissionMappings = new List<RolePermissionMappings>();

                    foreach (var permission in permissions)
                    {
                        var item = new RolePermissionMappings() { ApplicationRoleId = role.Id, FeaturePermissionId = permission.Id };
                        bool assigned = _context.RolePermissionMappings.Any(c => c.ApplicationRoleId == role.Id && c.FeaturePermissionId == permission.Id);
                        if (permission.IsEnabled && !assigned)
                            rolePermissionMappings.Add(item);

                    }
                    _context.RolePermissionMappings.AddRange(rolePermissionMappings);
                    await _context.SaveChangesAsync();

                    var user = new ApplicationUser
                    {
                        UserName = createTenantDto.Email,
                        Email = createTenantDto.Email,
                        TenantId = TenantId,
                        IsRootUser = true,
                        EmailConfirmed = true // comment this line of code after implimenting proper email verification 
                    };

                    var result = await _userManager.CreateAsync(user, createTenantDto.Password);
                    if (result.Succeeded)
                    {
                        try
                        {
                            var token = await _userManager.GeneratePasswordResetTokenAsync(user);
                            var resetLink = $"{_configuration["AppSettings:WebFrontendUrl"]}/reset-password?token={WebUtility.UrlEncode(token)}";

                            if (user.Email == null) return NotFound(ApiResponse<object>.ErrorResponse("Email Not found", "Email Not found", 404));

                            await _emailSender.SendTenanatRegistrationSuccessEmail(user.Email, newTenant.ContactName ?? "", resetLink);

                            Employee newEmployee = CreateTenantDtoToEmployee(createTenantDto, TenantId, user.Id, jobRole.Id);
                            _context.Employees.Add(newEmployee);
                            await _context.SaveChangesAsync();

                            var employeeRoleMapping = new EmployeeRoleMapping
                            {
                                EmployeeId = newEmployee.Id,
                                RoleId = role.Id,
                                TenantId = TenantId,
                                IsEnabled = true
                            };
                            _context.EmployeeRoleMappings.Add(employeeRoleMapping);
                            await _context.SaveChangesAsync();
                            transaction.Commit();
                            return Ok(ApiResponse<object>.SuccessResponse(result.Succeeded, "Tenant created successfully.", 200));
                        }catch(Exception ex)
                        {
                            transaction.Rollback();
                            _logger.LogError("{Error}", ex);
                        }
                    }
                    else
                    {
                        // Log the errors for debugging
                        foreach (var error in result.Errors)
                        {
                            // Log error.Description
                            _logger.LogError("{Error}", error.Description);
                        }
                        transaction.Rollback();
                        return BadRequest("Failed to create the root user.");
                    }
                }
                transaction.Rollback();
                return BadRequest("Falied to create Tenant");


            }
                return BadRequest("Email Already Exists");

        }

        [HttpGet("profile/{tenantId}")]
        public async Task<IActionResult> GetTenantProfile(int tenantId)
        {
            if (tenantId <= 0)
            {
                return BadRequest("Tenant Id is required and must be greater than zero.");
            }
            var tenant = await _context.Tenants.FirstOrDefaultAsync(t => t.Id == tenantId && t.IsActive ==true);
            if (tenant == null)
            {
                return NotFound("Tenant Not Found");
            }
            TenantVM tenantVM = tenant.ToTenantVMFromTenant();
            return Ok(ApiResponse<object>.SuccessResponse(tenantVM, "Tenant Profile.", 200));
        }

        [HttpPost("edit/{tenantId}")]
        public async Task<IActionResult> SuspendTenant(int tenantId, UpdateTenantDto model)
        {
            if (tenantId <= 0)
            {
                return BadRequest("Tenant Id is required and must be greater than zero.");
            }
            var tenant = await _context.Tenants.FirstOrDefaultAsync(t => t.Id == tenantId && t.IsActive == true);
            //var user = await _context.ApplicationUsers.FirstOrDefaultAsync(u => u.TenantId == tenantId && u.IsRootUser == true);
            //var employee = await _context.Employees.FirstOrDefaultAsync(e => e.Id == tenantId && e.ApplicationUserId == user.Id);
            if (tenant == null)
            {
                return NotFound("Tenant Not Found");
            }
            tenant.Name = model.OrganizatioinName;
            tenant.DomainName = model.Website;
            tenant.ContactName = model.Name;
            tenant.Description = model.About;
            tenant.ContactNumber = model.ContactNumber;
            tenant.OnBoardingDate = model.OnBoardingDate;

            await _context.SaveChangesAsync();
            TenantVM tenantVM = tenant.ToTenantVMFromTenant();
            return Ok(ApiResponse<object>.SuccessResponse(tenantVM, "Tenant Profile.", 200));
        }

        [HttpDelete("suspend/{tenantId}")]
        public async Task<IActionResult> SuspendTenant(int tenantId)
        {
            if (tenantId <= 0)
            {
                return BadRequest("Tenant Id is required and must be greater than zero.");
            }
            var tenant = await _context.Tenants.FirstOrDefaultAsync(t => t.Id == tenantId);
            var user = await _context.ApplicationUsers.FirstOrDefaultAsync(u => u.TenantId == tenantId && u.IsRootUser == true);
            if (tenant != null && user != null)
            {
                var employee = await _context.Employees.FirstOrDefaultAsync(e => e.TenantId == tenantId && e.ApplicationUserId == user.Id) ?? new Employee();
                tenant.IsActive = false;
                user.IsActive = false;
                user.IsRootUser = false;
                employee.IsActive = false;


                var result = await _userManager.UpdateAsync(user);
                _context.Tenants.Update(tenant);
                _context.Employees.Update(employee);
                await _context.SaveChangesAsync();
                return Ok("Tenant is Suspended");
            }
            return NotFound("Tenant Not Found");
        }

        private static Employee CreateTenantDtoToEmployee(CreateTenantDto model, int TenantId, string? ApplicationUserId, int jobRoleId)
        {
            return new Employee
            {
                ApplicationUserId = ApplicationUserId,
                FirstName = model.Name,
                LastName = "",
                Email = model.Email,
                TenantId = TenantId,
                CurrentAddress = "",
                BirthDate = DateTime.UtcNow,
                EmergencyPhoneNumber = "",
                EmergencyContactPerson = "",
                AadharNumber = "",
                Gender = "",
                MiddleName = "",
                PanNumber = "",
                PermanentAddress = "",
                PhoneNumber = model.ContactNumber,
                Photo = null, // GetFileDetails(model.Photo).Result.FileData,
                JobRoleId = jobRoleId,
                JoiningDate = DateTime.UtcNow,

            };
        }


    }

}