using Microsoft.AspNetCore.Mvc;
using T120B165_ImgBoard.Dtos;
using T120B165_ImgBoard.Dtos.Tag;
using T120B165_ImgBoard.Models;
using T120B165_ImgBoard.Services;
using T120B165_ImgBoard.Utils;

namespace T120B165_ImgBoard.Controllers;

[ApiController]
[Route("api/tags")]
public class TagController(ITagService tagService) : ControllerBase
{
    [HttpPost]
    [ProducesResponseType(StatusCodes.Status201Created)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    [ProducesResponseType(StatusCodes.Status409Conflict)]
    public async Task<ActionResult<Tag>> Create(CreateTagDto dto)
    {
        // Check if tag exists, if it does, throw a conflict
        var existingTag = await tagService.GetByName(dto.Name);
        if (existingTag != null)
        {
            return Problem(
                detail: "Tag with such name already exists.",
                statusCode: StatusCodes.Status409Conflict
            );
        }
        
        var createdTag = await tagService.Create(dto.Type, dto.Name);
        return CreatedAtAction(nameof(Get), new { name = createdTag.Name }, createdTag);
    }

    [HttpGet]
    [ProducesResponseType(StatusCodes.Status200OK)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    public async Task<ActionResult<PagedList<Tag>>> GetAll(int pageNumber = 1)
    {
        return Ok(await tagService.GetAll(pageNumber));
    }
    
    [HttpGet("{name}")]
    [ProducesResponseType(StatusCodes.Status200OK)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    public async Task<ActionResult<Tag>> Get(string name)
    {
        var tag = await tagService.GetByName(name);
        if (tag == null)
        {
            return NotFound();
        }
        return Ok(tag);
    }

    [HttpDelete("{name}")]
    [ProducesResponseType(StatusCodes.Status204NoContent)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    public async Task<ActionResult> Delete(string name)
    {
        var deleted = await tagService.DeleteByName(name);
        if (!deleted) return NotFound();
        return NoContent();
    }

    [HttpPatch("{name}")]
    [ProducesResponseType(StatusCodes.Status200OK)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    public async Task<ActionResult<Tag>> Update(string name, EditTagDto dto)
    {
        var tag = await tagService.GetByName(name);
        if (tag == null) return NotFound();
        var updatedTag = await tagService.Update(tag, dto.Type);
        return Ok(updatedTag);
    }
}