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

namespace Flawless.Server.Controllers;

[ApiController, Authorize, Route("api/repo_manage")]
public class RepositoryManageController(AppDbContext dbContext, UserManager<AppUser> userManager) : ControllerBase
{
    [HttpGet("list")]
    public async Task<IActionResult> ListAllAvailableRepositoriesAsync(QueryPagesRequest r)
    {
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var query = await dbContext.Repositories
            .Include(repository => repository.Owner)
            .Include(repository => repository.Commits)
            .Include(repository => repository.Members)
            .ThenInclude(repositoryMember => repositoryMember.User)
            .Where(rp => rp.Members.Any(m => m.User == u))
            .Skip(r.Offset)
            .Take(r.Length)
            .ToArrayAsync();

        return Ok(new PagedResponse<RepositoryInfoResponse>
        {
            Length = r.Length,
            Offset = r.Offset,
            Data = query.Select(rp => new RepositoryInfoResponse
            {
                RepositoryName = rp.Name,
                OwnerUsername = rp.Owner.UserName!,
                LatestCommitId = rp.Commits.OrderByDescending(cm => cm.CommittedOn).FirstOrDefault()?.Id ?? Guid.Empty,
                Description = rp.Description,
                IsArchived = rp.IsArchived,
                Role = rp.Members.First(m => m.User == u).Role
            }),
        });
    }

    [HttpPost("create/{repositoryName}")]
    public async Task<IActionResult> CreateRepositoryAsync(string repositoryName)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));

        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        if (await dbContext.Repositories.AnyAsync(rp => rp.Name == repositoryName && u == rp.Owner))
            return BadRequest(new FailedResponse("Repository name has already created!"));

        await dbContext.Repositories.AddAsync(new Repository()
        {
            Name = repositoryName,
            Owner = u,
        });
        
        await dbContext.SaveChangesAsync();
        return Ok();
    }

    [HttpPost("delete/{repositoryName}")]
    public async Task<IActionResult> DeleteRepositoryAsync(string repositoryName)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var rp = await dbContext.Repositories.FirstOrDefaultAsync(rp => rp.Name == repositoryName && u == rp.Owner);
        if (rp == null) return BadRequest(new FailedResponse("Repository not found!"));
        
        dbContext.Repositories.Remove(rp);
        await dbContext.SaveChangesAsync();
        return Ok();
    }
    
    [HttpGet("info/{repositoryName}")]
    public async Task<IActionResult> IsRepositoryArchiveAsync(string repositoryName)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var rp = await dbContext.Repositories
            .Include(repository => repository.Owner)
            .Include(repository => repository.Commits)
            .Include(repository => repository.Members)
            .ThenInclude(repositoryMember => repositoryMember.User)
            .FirstOrDefaultAsync(rp => rp.Name == repositoryName && u == rp.Owner);
        
        if (rp == null) return BadRequest(new FailedResponse("Repository not found!"));
        
        return Ok(new RepositoryInfoResponse
        {
            RepositoryName = rp.Name,
            OwnerUsername = rp.Owner.UserName!,
            LatestCommitId = rp.Commits.Max(cm => cm.Id),
            Description = rp.Description,
            IsArchived = rp.IsArchived,
            Role = rp.Members.First(m => m.User == u).Role
        });
    }
    
    [HttpPost("archive/{repositoryName}")]
    public async Task<IActionResult> ArchiveRepositoryAsync(string repositoryName)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var rp = await dbContext.Repositories.FirstOrDefaultAsync(rp => rp.Name == repositoryName && u == rp.Owner);
        if (rp == null) return BadRequest(new FailedResponse("Repository not found!"));
        if (rp.IsArchived) return BadRequest(new FailedResponse("Repository is archived!"));
        
        rp.IsArchived = true;
        await dbContext.SaveChangesAsync();
        return Ok();
    }
    
    
    [HttpPost("unarchive/{repositoryName}")]
    public async Task<IActionResult> UnarchiveRepositoryAsync(string repositoryName)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var rp = await dbContext.Repositories.FirstOrDefaultAsync(rp => rp.Name == repositoryName && u == rp.Owner);
        if (rp == null) return BadRequest(new FailedResponse("Repository not found!"));
        if (!rp.IsArchived) return BadRequest(new FailedResponse("Repository is not archived!"));
        
        rp.IsArchived = false;
        await dbContext.SaveChangesAsync();
        return Ok();
    }
    
    [HttpGet("get_users/{repositoryName}")]
    public async Task<IActionResult> GetUsersAsync(string repositoryName, QueryPagesRequest r)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var rp = await dbContext.Repositories
            .Include(repository => repository.Owner)
            .Include(repository => repository.Members)
            .ThenInclude(repositoryMember => repositoryMember.User)
            .FirstOrDefaultAsync(rp => rp.Name == repositoryName && u == rp.Owner);
        
        if (rp == null) return BadRequest(new FailedResponse("Repository not found!"));
        
        return Ok(new PagedResponse<RepoUserRole>
        {
            Length = r.Length,
            Offset = r.Offset,
            Total = rp.Members.Count,
            Data = rp.Members.Select(pm => new RepoUserRole
            {
                Username = pm.User.UserName!,
                Role = pm.Role
            })
        });
    }

    [HttpPost("update_user/{repositoryName}")]
    public async Task<IActionResult> UpdateUserAsync(string repositoryName, [FromBody] RepoUserRole r)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var tu = await userManager.FindByNameAsync(r.Username);
        if (tu == null) return BadRequest(new FailedResponse("User not found!"));
        if (u == tu) return BadRequest(new FailedResponse("Not able to update the role on self-own repository!"));
        
        var rp = await dbContext.Repositories
            .Include(repository => repository.Members)
            .ThenInclude(repositoryMember => repositoryMember.User)
            .FirstOrDefaultAsync(rp => rp.Name == repositoryName && u == rp.Owner);
        
        if (rp == null) return BadRequest(new FailedResponse("Repository not found!"));

        var m = rp.Members.FirstOrDefault(m => m.User == tu);
        if (m == null)
        {
            m = new RepositoryMember
            {
                User = tu,
                Role = r.Role ?? RepositoryRole.Guest
            };
            
            rp.Members.Add(m);
        }
        else
        {
            m.Role = r.Role ?? RepositoryRole.Guest;
        }
        
        await dbContext.SaveChangesAsync();
        return Ok();
    }

    [HttpPost("delete_user/{repositoryName}")]
    public async Task<IActionResult> DeleteUserAsync(string repositoryName, [FromBody] RepoUserRole r)
    {
        if (string.IsNullOrWhiteSpace(repositoryName) || repositoryName.Length <= 3)
            return BadRequest(new FailedResponse("Repository name is empty or too short!"));
        
        var u = (await userManager.GetUserAsync(HttpContext.User))!;
        var tu = await userManager.FindByNameAsync(r.Username);
        if (tu == null) return BadRequest(new FailedResponse("User not found!"));
        if (u == tu) return BadRequest(new FailedResponse("Not able to update the role on self-own repository!"));
        
        var rp = await dbContext.Repositories
            .Include(repository => repository.Members)
            .ThenInclude(repositoryMember => repositoryMember.User)
            .FirstOrDefaultAsync(rp => rp.Name == repositoryName && u == rp.Owner);
        
        if (rp == null) return BadRequest(new FailedResponse("Repository not found!"));

        var m = rp.Members.FirstOrDefault(m => m.User == tu);
        if (m == null) return BadRequest(new FailedResponse("User is not being granted to this repository!"));
        
        rp.Members.Remove(m);
        await dbContext.SaveChangesAsync();
        return Ok();
    }
}