using System.ComponentModel.DataAnnotations;
using System.Text.Json;
using API.Context;
using API.DTO;
using API.Validation;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Model;
using Services;

namespace API.Controllers;

[ApiController]
public class TacticController(ITacticService service, IContextAccessor accessor) : ControllerBase
{
    public record UpdateNameRequest(
        [StringLength(50, MinimumLength = 1)]
        [Name]
        string Name
    );

    [HttpPut("/tactics/{tacticId:int}/name")]
    [Authorize]
    public async Task<IActionResult> UpdateName(
        int tacticId,
        [FromBody] UpdateNameRequest req)
    {
        var userId = accessor.CurrentUserId(HttpContext);
        if (!await service.IsOwnerOf(userId, tacticId))
        {
            return Unauthorized();
        }

        var result = await service.UpdateName(tacticId, req.Name);

        return result ? Ok() : NotFound();
    }

    [HttpGet("/tactics/{tacticId:int}")]
    [Authorize]
    public async Task<IActionResult> GetTacticInfo(int tacticId)
    {
        var userId = accessor.CurrentUserId(HttpContext);
        if (!await service.IsOwnerOf(userId, tacticId))
        {
            return Unauthorized();
        }

        var result = await service.GetTactic(tacticId);
        return result != null ? Ok(result.ToDto()) : NotFound();
    }

    public record GetTacticStepsTreeResponse(TacticStepDto Root);

    [HttpGet("/tactics/{tacticId:int}/tree")]
    [Authorize]
    public async Task<IActionResult> GetTacticStepsRoot(int tacticId)
    {
        var userId = accessor.CurrentUserId(HttpContext);
        if (!await service.IsOwnerOf(userId, tacticId))
        {
            return Unauthorized();
        }

        var root = (await service.GetRootStep(tacticId)).ToDto();
        return Ok(new GetTacticStepsTreeResponse(root));
    }


    public record CreateNewRequest(
        [StringLength(50, MinimumLength = 1)]
        [Name]
        string Name,
        [AllowedValues("PLAIN", "HALF")] string CourtType
    );

    public record CreateNewResponse(int Id);

    [HttpPost("/tactics")]
    [Authorize]
    public async Task<CreateNewResponse> CreateNew([FromBody] CreateNewRequest req)
    {
        var userId = accessor.CurrentUserId(HttpContext);

        if (!Enum.TryParse<CourtType>(req.CourtType, true, out var courtType))
        {
            // unreachable if called by ASP
            throw new ArgumentOutOfRangeException("for req.CourtType");
        }

        var id = await service.AddTactic(userId, req.Name, courtType);
        return new CreateNewResponse(id);
    }

    public record AddStepRequest(int ParentId, object Content);

    public record AddStepResponse(int StepId);

    [HttpPost("/tactics/{tacticId:int}/steps")]
    public async Task<IActionResult> AddStep(int tacticId, [FromBody] AddStepRequest req)
    {
        var stepId = await service.AddTacticStep(tacticId, req.ParentId, JsonSerializer.Serialize(req.Content));
        return stepId != null ? Ok(new AddStepResponse(stepId ?? 0)) : NotFound();
    }


    [HttpGet("/tactics/{tacticId:int}/steps/{stepId:int}")]
    [Authorize]
    public async Task<IActionResult> GetStepContent(int tacticId, int stepId)
    {
        var userId = accessor.CurrentUserId(HttpContext);

        if (!await service.IsOwnerOf(userId, tacticId))
        {
            return Unauthorized();
        }

        var json = await service.GetTacticStepContent(tacticId, stepId);
        return json != null ? Ok(JsonSerializer.Deserialize<object>(json)) : NotFound();
    }

    [HttpDelete("/tactics/{tacticId:int}/steps/{stepId:int}")]
    [Authorize]
    public async Task<IActionResult> RemoveStep(int tacticId, int stepId)
    {
        var userId = accessor.CurrentUserId(HttpContext);

        if (!await service.IsOwnerOf(userId, tacticId))
        {
            return Unauthorized();
        }

        var found = await service.RemoveTacticStep(tacticId, stepId);
        return found ? Ok() : NotFound();
    }

    public record SaveStepContentRequest(object Content);


    [HttpPut("/tactics/{tacticId:int}/steps/{stepId:int}")]
    [Authorize]
    public async Task<IActionResult> SaveStepContent(int tacticId, int stepId, [FromBody] SaveStepContentRequest req)
    { 
        var userId = accessor.CurrentUserId(HttpContext);
        if (!await service.IsOwnerOf(userId, tacticId))
        {
            return Unauthorized();
        }

        var found = await service.SetTacticStepContent(tacticId, stepId, JsonSerializer.Serialize(req.Content));
        return found ? Ok() : NotFound();
    }

    public record CanEditResponse(bool CanEdit);

    [HttpGet("/tactics/{tacticId:int}/can-edit")]
    [Authorize]
    public async Task<CanEditResponse> CanEdit(int tacticId)
    {
        var userId = accessor.CurrentUserId(HttpContext);
        return new CanEditResponse(await service.IsOwnerOf(userId, tacticId));
    }
}