using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using eprintServer.Services;
using eprintServer.Responses;
using eprintServer.Entities;
using eprintServer.Requests;
using eprintServer.Enums;


namespace eprintServer.Controllers;

[ApiController]
[Route("api/[controller]")]
[Authorize(Roles = "ADMIN,SUB_ADMIN")]
public class SubAdminController : ControllerBase
{
    private readonly UserService _userService;
    private readonly SubAdminService _subAdminService;

    public SubAdminController(UserService userService, SubAdminService subAdminService)
    {
        _userService = userService;
        _subAdminService = subAdminService; 
    }


    [HttpGet("get-subadmin-privileges")]
    public ActionResult<List<PrivilegeResponse>> GetSubAdminPrivileges()
    {
        var privileges = _subAdminService.GetSubAdminPrivileges();
        return Ok(privileges);
    }

    [HttpPost("add_sub_admin")]
    public async Task<ActionResult<User>> AddEmployee([FromBody] SubAdminRequest request)
    {
        if (string.IsNullOrEmpty(request.Password) || string.IsNullOrEmpty(request.Email))
        {
            return StatusCode(StatusCodes.Status406NotAcceptable, "Email and password can't be null or empty.");
        }

        if (await _userService.ExistByEmailAsync(request.Email.ToLower()))
        {
            return StatusCode(StatusCodes.Status406NotAcceptable, "Email already exists.");
        }

        if (!string.IsNullOrEmpty(request.PhoneNumber) && await _userService.ExistByPhoneNumberAsync(request.PhoneNumber))
        {
            return StatusCode(StatusCodes.Status406NotAcceptable, "Phone number already exists.");
        }
        
        try
        {
            var userCount = await _userService.GetUserCountAsync();
            var Username = _userService.GenerateUsername(request.Name, userCount);

            var newUser = new User
            {
                Name = request.Name,
                Email = request.Email,
                Username = Username,
                PhoneNumber = request.PhoneNumber,
                City = request.City,
                Country = request.Country,
                OfficeRole = request.OfficeRole,
                Password = request.Password,
                Active = true,
                SubAdminsPrivilegesList = request.Privileges
            };

           var result = await _userService.SaveSubAdminAsync(newUser);
           
            return Ok(result);
        }
        catch (Exception e)
        {
            return StatusCode(StatusCodes.Status500InternalServerError, $"An error occurred while saving: {e.Message}");
        }
    }



    [HttpPut("update_sub_admin_privileges/{userId}")]
    public async Task<ActionResult<User>> UpdateSubAdminPrivileges(
        long userId, 
        [FromBody] UpdateSubAdminPrivilegesRequest request)
    {
        if (userId <= 0)
        {
            return BadRequest("A valid user ID is required in the path.");
        }
        
        try
        {
            var updatedUser = await _userService.UpdateSubAdminPrivilegesAsync(userId, request.Privileges);

            if (updatedUser == null)
            {
                return NotFound($"User with ID {userId} not found.");
            }

            return Ok(updatedUser);
        }
        catch (Exception e)
        {
            return StatusCode(StatusCodes.Status500InternalServerError, $"An error occurred while updating privileges: {e.Message}");
        }
    }

    [HttpGet("get_sub_admins")]
    public async Task<ActionResult<PagedResult<User>>> GetSubAdmins(
        [FromQuery] int page = 0,
        [FromQuery] int size = 5,
        [FromQuery] string? search = null)
    {
        try
        {
      
            var pagedResult = await _userService.GetPagedUsersByCriteriaAsync(
                page: page,
                size: size,
                role: RoleEnum.ROLE_SUB_ADMIN,
                search
            );

            return Ok(pagedResult);
        }
        catch (Exception e)
        {
            return StatusCode(StatusCodes.Status500InternalServerError, $"An error occurred while fetching sub-admins: {e.Message}");
        }
    }
}