using Flawless.Communication.Request;
using Flawless.Communication.Response;
using Flawless.Communication.Shared;
using Flawless.Server.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace Flawless.Server.Controllers;

[ApiController, Authorize, Route("api/user")]
public class UserController(
    UserManager<AppUser> userManager
    ) : ControllerBase
{
    
    [HttpPost("update/info")]
    public async Task<IActionResult> UpdateUserInfoAsync(UserInfoModifyResponse r)
    {
        bool update = false;
        bool renew = false;
        
        // Modify content
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        
        if (r.NickName != null)
        {
            update = true;
            u.NickName = r.NickName;
        }
        
        if (r.Bio != null)
        {
            update = true;
            u.Bio = r.Bio;
        }

        if (r.Gender != null)
        {
            update = true;
            u.Gender = r.Gender ?? UserSex.Unset;
        }

        if (r.PublicEmail != null)
        {
            update = true;
            u.PublicEmail = r.PublicEmail ?? false;
        }


        if (renew) u.RenewSecurityStamp();
        if (update || renew) await userManager.UpdateAsync(u);
        return Ok();
    }

    [HttpPost("update/email")]
    public async Task<IActionResult> UpdateEmailAsync(UserContactModifyResponse r)
    {
        if (string.IsNullOrWhiteSpace(r.Email))
            return BadRequest(new FailedResponse("No valid email address provided!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var result = await userManager.SetEmailAsync(u, r.Email);
        if (!result.Succeeded) return BadRequest(new FailedResponse(result.Errors));
        
        return Ok();
    }
    
    
    [HttpPost("update/phone")]
    public async Task<IActionResult> UpdatePhoneAsync(UserContactModifyResponse r)
    {
        if (string.IsNullOrWhiteSpace(r.Phone))
            return BadRequest(new FailedResponse("No valid phone number provided!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var result = await userManager.SetPhoneNumberAsync(u, r.Phone);
        if (!result.Succeeded) return BadRequest(new FailedResponse(result.Errors));
        
        return Ok();
    }
    
    [HttpGet("get/info")]
    public async Task<ActionResult<UserInfoResponse>> GetUserInfoAsync(LocateUserRequest r)
    {
        var self = (await userManager.GetUserAsync(HttpContext.User))!;

        if (r.UserId != null)
        {
            var u = await userManager.FindByIdAsync(r.UserId);
            if (u == null) return BadRequest(new FailedResponse("User is not existed!"));
            
            return Ok(GetUserInfoInternal(u, self));
        }
        
        if (r.Username != null)
        {
            var u = await userManager.FindByNameAsync(r.Username);
            if (u == null) return BadRequest(new FailedResponse("User is not existed!"));
            
            return Ok(GetUserInfoInternal(u, self));
        }
        
        // Return self as default
        return Ok(GetUserInfoInternal(self, self));
    }
    
    [HttpGet("query/info")]
    public async Task<ActionResult<PagedResponse<UserInfoResponse>>> GetUserInfoAsync(QueryPagesRequest<LocateUserRequest> r)
    {
        var queryNamePrefix = r.Parameter?.Username ?? String.Empty;
        var queryId = r.Parameter == null ? Guid.Empty : Guid.Parse(r.Parameter.UserId!);
        var payload = await userManager.Users
            .Where(u => u.UserName!.StartsWith(queryNamePrefix) || u.Id == queryId)
            .Skip(r.Offset)
            .Take(r.Length)
            .Select(u => GetUserInfoInternal(u, null))
            .ToArrayAsync();
        
        // Return self as default
        return Ok(new PagedResponse<UserInfoResponse>
        {
            Offset = r.Offset,
            Length = r.Length,
            Data = payload
        });
    }

    [HttpGet("delete")]
    public async Task<IActionResult> DeleteUserAsync()
    {
        var self = (await userManager.GetUserAsync(HttpContext.User))!;
        await userManager.DeleteAsync(self);
        return Ok();
    }
    
    
    private UserInfoResponse GetUserInfoInternal(AppUser queryUser, AppUser? currentUser)
    {
        var authorized = queryUser.Id == currentUser?.Id;
        return new UserInfoResponse
        {
            Username = queryUser.UserName,
            CreatedAt = queryUser.CreatedOn,
            Bio = queryUser.Bio,
            Gender = queryUser.Gender,
            NickName = queryUser.NickName,
            Email = queryUser.PublicEmail || authorized ? queryUser.Email : null,
        };
    }
}