using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Nuuru.Server.Auth;
using Nuuru.Server.DTOs.Admin;
using Nuuru.Server.Models;
using Nuuru.Server.Services;

namespace Nuuru.Server.Controllers
{
    [ApiController]
    [Route("api/booru/tag-categories")]
    public class TagCategoryController : ControllerBase
    {
        private readonly ITagCategoryService _categoryService;
        private readonly ILogger<TagCategoryController> _logger;

        public TagCategoryController(
            ITagCategoryService categoryService,
            ILogger<TagCategoryController> logger)
        {
            _categoryService = categoryService;
            _logger = logger;
        }

        /// <summary>
        /// Get all tag categories
        /// </summary>
        [HttpGet]
        [AllowAnonymous]
        public async Task<IActionResult> GetCategories()
        {
            try
            {
                var categories = await _categoryService.GetAllCategoriesAsync();
                return Ok(categories);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error retrieving tag categories");
                return StatusCode(500, new { error = "Failed to retrieve tag categories" });
            }
        }

        /// <summary>
        /// Get a tag category by ID
        /// </summary>
        [HttpGet("{id:guid}")]
        [AllowAnonymous]
        public async Task<IActionResult> GetCategory(Guid id)
        {
            try
            {
                var category = await _categoryService.GetCategoryByIdAsync(id);
                if (category == null)
                {
                    return NotFound(new { error = "Tag category not found" });
                }

                return Ok(category);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error retrieving tag category {Id}", id);
                return StatusCode(500, new { error = "Failed to retrieve tag category" });
            }
        }

        /// <summary>
        /// Get a tag category by slug
        /// </summary>
        [HttpGet("slug/{slug}")]
        [AllowAnonymous]
        public async Task<IActionResult> GetCategoryBySlug(string slug)
        {
            try
            {
                var category = await _categoryService.GetCategoryBySlugAsync(slug);
                if (category == null)
                {
                    return NotFound(new { error = "Tag category not found" });
                }

                return Ok(category);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error retrieving tag category by slug {Slug}", slug);
                return StatusCode(500, new { error = "Failed to retrieve tag category" });
            }
        }

        /// <summary>
        /// Create a new tag category
        /// </summary>
        [HttpPost]
        [Authorize(Policy = Permissions.Admin.SystemSettings)]
        public async Task<IActionResult> CreateCategory([FromBody] CreateTagCategoryRequest request)
        {
            try
            {
                var category = await _categoryService.CreateCategoryAsync(request);

                // Set target for audit log
                HttpContext.Items[AuditLog.TargetIdKey] = category.Id.ToString();
                HttpContext.Items[AuditLog.TargetTypeKey] = "TagCategory";

                return CreatedAtAction(nameof(GetCategory), new { id = category.Id }, category);
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new { error = ex.Message });
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error creating tag category");
                return StatusCode(500, new { error = "Failed to create tag category" });
            }
        }

        /// <summary>
        /// Update an existing tag category
        /// </summary>
        [HttpPut("{id:guid}")]
        [Authorize(Policy = Permissions.Admin.SystemSettings)]
        public async Task<IActionResult> UpdateCategory(Guid id, [FromBody] UpdateTagCategoryRequest request)
        {
            try
            {
                var category = await _categoryService.UpdateCategoryAsync(id, request);
                if (category == null)
                {
                    return NotFound(new { error = "Tag category not found" });
                }

                // Set target for audit log
                HttpContext.Items[AuditLog.TargetIdKey] = id.ToString();
                HttpContext.Items[AuditLog.TargetTypeKey] = "TagCategory";

                return Ok(category);
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new { error = ex.Message });
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error updating tag category {Id}", id);
                return StatusCode(500, new { error = "Failed to update tag category" });
            }
        }

        /// <summary>
        /// Delete a tag category (only if it has no tags)
        /// </summary>
        [HttpDelete("{id:guid}")]
        [Authorize(Policy = Permissions.Admin.SystemSettings)]
        public async Task<IActionResult> DeleteCategory(Guid id)
        {
            try
            {
                var result = await _categoryService.DeleteCategoryAsync(id);
                if (!result)
                {
                    return NotFound(new { error = "Tag category not found" });
                }

                // Set target for audit log
                HttpContext.Items[AuditLog.TargetIdKey] = id.ToString();
                HttpContext.Items[AuditLog.TargetTypeKey] = "TagCategory";

                return Ok(new { message = "Tag category deleted successfully" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new { error = ex.Message });
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error deleting tag category {Id}", id);
                return StatusCode(500, new { error = "Failed to delete tag category" });
            }
        }
    }
}