#nullable enable
using LBPUnion.ProjectLighthouse.Database;
using LBPUnion.ProjectLighthouse.Extensions;
using LBPUnion.ProjectLighthouse.Helpers;
using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
using LBPUnion.ProjectLighthouse.Types.Entities.Token;
using LBPUnion.ProjectLighthouse.Types.Levels;
using LBPUnion.ProjectLighthouse.Types.Serialization;
using LBPUnion.ProjectLighthouse.Types.Users;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace LBPUnion.ProjectLighthouse.Servers.GameServer.Controllers;

[ApiController]
[Authorize]
[Route("LITTLEBIGPLANETPS3_XML/")]
[Produces("text/xml")]
public class CommentController : ControllerBase
{
    private readonly DatabaseContext database;
    public CommentController(DatabaseContext database)
    {
        this.database = database;
    }

    [HttpPost("rateUserComment/{username}")]
    [HttpPost("rateComment/{slotType}/{slotId:int}")]
    public async Task<IActionResult> RateComment([FromQuery] int commentId, [FromQuery] int rating, string? username, string? slotType, int slotId)
    {
        GameTokenEntity token = this.GetToken();

        // Return bad request if both are true or both are false
        if ((slotId == 0 || SlotHelper.IsTypeInvalid(slotType)) == (username == null)) return this.BadRequest();

        bool success = await this.database.RateComment(token.UserId, commentId, rating);
        if (!success) return this.BadRequest();

        return this.Ok();
    }

    [HttpGet("comments/{slotType}/{slotId:int}")]
    [HttpGet("userComments/{username}")]
    public async Task<IActionResult> GetComments([FromQuery] int pageStart, [FromQuery] int pageSize, string? username, string? slotType, int slotId)
    {
        GameTokenEntity token = this.GetToken();

        if (pageSize <= 0 || pageStart < 0) return this.BadRequest();

        if ((slotId == 0 || SlotHelper.IsTypeInvalid(slotType)) == (username == null)) return this.BadRequest();

        if (slotType == "developer") slotId = await SlotHelper.GetPlaceholderSlotId(this.database, slotId, SlotType.Developer);

        int targetId;
        CommentType type = username == null ? CommentType.Level : CommentType.Profile;

        if (type == CommentType.Level)
        {
            targetId = await this.database.Slots.Where(s => s.SlotId == slotId)
                .Where(s => s.CommentsEnabled && !s.Hidden)
                .Select(s => s.SlotId)
                .FirstOrDefaultAsync();
        }
        else
        {
            targetId = await this.database.Users.Where(u => u.Username == username)
                .Where(u => u.CommentsEnabled)
                .Select(u => u.UserId)
                .FirstOrDefaultAsync();
        }

        if (targetId == 0) return this.NotFound();

        List<int> blockedUsers =  await (
                from blockedProfile in this.database.BlockedProfiles
                where blockedProfile.UserId == token.UserId
                select blockedProfile.BlockedUserId).ToListAsync();

        List<GameComment> comments = (await this.database.Comments.Where(p => p.TargetId == targetId && p.Type == type)
            .OrderByDescending(p => p.Timestamp)
            .Where(p => !blockedUsers.Contains(p.PosterUserId))
            .Include(c => c.Poster)
            .Where(p => p.Poster.PermissionLevel != PermissionLevel.Banned)
            .Skip(Math.Max(0, pageStart - 1))
            .Take(Math.Min(pageSize, 30))
            .ToListAsync()).ToSerializableList(c => GameComment.CreateFromEntity(c, token.UserId));

        return this.Ok(new CommentListResponse(comments));
    }

    [HttpPost("postUserComment/{username}")]
    [HttpPost("postComment/{slotType}/{slotId:int}")]
    public async Task<IActionResult> PostComment(string? username, string? slotType, int slotId)
    {
        GameTokenEntity token = this.GetToken();

        GameComment? comment = await this.DeserializeBody<GameComment>();
        if (comment == null) return this.BadRequest();

        if ((slotId == 0 || SlotHelper.IsTypeInvalid(slotType)) == (username == null)) return this.BadRequest();

        if (slotType == "developer") slotId = await SlotHelper.GetPlaceholderSlotId(this.database, slotId, SlotType.Developer);

        CommentType type = username == null ? CommentType.Level : CommentType.Profile;

        int targetId;
        if (type == CommentType.Level)
        {
            targetId = await this.database.Slots.Where(s => s.SlotId == slotId)
                .Where(s => s.CommentsEnabled && !s.Hidden)
                .Select(s => s.SlotId)
                .FirstOrDefaultAsync();
        }
        else
        {
            targetId = await this.database.UserIdFromUsername(username!);
        }

        string filteredText = CensorHelper.FilterMessage(comment.Message);

        bool success = await this.database.PostComment(token.UserId, targetId, type, filteredText);
        if (success) return this.Ok();

        return this.BadRequest();
    }

    [HttpPost("deleteUserComment/{username}")]
    [HttpPost("deleteComment/{slotType}/{slotId:int}")]
    public async Task<IActionResult> DeleteComment([FromQuery] int commentId, string? username, string? slotType, int slotId)
    {
        GameTokenEntity token = this.GetToken();

        if ((slotId == 0 || SlotHelper.IsTypeInvalid(slotType)) == (username == null)) return this.BadRequest();

        CommentEntity? comment = await this.database.Comments.FirstOrDefaultAsync(c => c.CommentId == commentId);
        if (comment == null) return this.NotFound();

        if (comment.Deleted) return this.Ok();

        bool canDelete;
        if (comment.Type == CommentType.Profile)
        {
            canDelete = comment.PosterUserId == token.UserId || comment.TargetId == token.UserId;
        }
        else
        {
            if (slotType == "developer") slotId = await SlotHelper.GetPlaceholderSlotId(this.database, slotId, SlotType.Developer);

            if (slotId != comment.TargetId) return this.BadRequest();

            int slotCreator = await this.database.Slots.Where(s => s.SlotId == comment.TargetId)
                .Where(s => s.CommentsEnabled)
                .Select(s => s.CreatorId)
                .FirstOrDefaultAsync();

            // Comments are disabled or the slot doesn't have a creator
            if (slotCreator == 0) return this.BadRequest();

            canDelete = comment.PosterUserId == token.UserId || slotCreator == token.UserId;
        }

        if (!canDelete) return this.Forbid();

        comment.Deleted = true;
        comment.DeletedBy = await this.database.UsernameFromGameToken(token);
        comment.DeletedType = "user";

        await this.database.SaveChangesAsync();
        return this.Ok();
    }
}