using Azure;
using DamageAssesment.Api.Attachments.Interfaces;
using DamageAssesment.Api.Attachments.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System.Net.Http.Headers;

namespace DamageAssesment.Api.Attachments.Controllers
{
    [ApiController]
    public class AttachmentsController : ControllerBase
    {
        private IAttachmentsProvider AttachmentProvider;
        private IUploadService UploadService;

        public AttachmentsController(IAttachmentsProvider AttachmentsProvider, IUploadService uploadService)
        {
            this.AttachmentProvider = AttachmentsProvider;
            this.UploadService = uploadService;  
        }
        /// <summary>
        /// Get all attachments.
        /// </summary>
        [Authorize(Roles = "admin")]
        [HttpGet("attachments")]
        public async Task<ActionResult> GetAttachmentsAsync()
        {

            var result = await AttachmentProvider.GetAttachmentsAsync();
            if (result.IsSuccess)
            {
                return Ok(result.Attachments);
            }
            return NoContent();

        }
        /// <summary>
        /// Get all attachments by attachmentId.
        /// </summary>
        [Authorize(Roles = "admin")]
        [HttpGet("attachments/{id}")]
        public async Task<ActionResult> GetAttachmentbyIdAsync(int id)
        {

            var result = await AttachmentProvider.GetAttachmentByIdAsync(id);
            if (result.IsSuccess)
            {
                return Ok(result.Attachment);
            }
            return NotFound();

        }
        ////Save new Attachment
        //[HttpPost("Attachments"), DisableRequestSizeLimit]
        //public async Task<IActionResult> UploadAsync(int responseId, int answerId, List<IFormFile> postedFile)
        //{
        //    try 
        //    {

        //        if (postedFile.Count > 0)
        //        {
        //            //Upload logic for all files
        //            var Attachments= await this.AttachmentProvider.DeleteAttachmentsAsync(responseId,answerId);
        //            List<Db.Attachment> attachments = UploadService.UploadAttachment(responseId, answerId, Attachments.counter, postedFile);
        //            //inserting all uploaded files in database
        //             var result = await this.AttachmentProvider.PostAttachmentAsync(attachments);
        //            if (result.IsSuccess)
        //            {
        //                return Ok(result.Attachments);
        //            }
        //            return BadRequest(result.ErrorMessage);
        //        }
        //        return NoContent();
        //    }
        //    catch (Exception ex)
        //    {
        //        return BadRequest($"Internal server error: {ex}");
        //    }
        //}

        /// <summary>
        /// Save new Attachment(s)
        /// </summary>
        [Authorize(Roles = "admin")]
        [HttpPost("attachments"), DisableRequestSizeLimit]
        public async Task<IActionResult> UploadAttachmentAsync(AttachmentInfo attachmentInfo)
        {
            try
            {
                if (attachmentInfo.Answers.Count > 0)
                {
                    var Attachments =  await this.AttachmentProvider.GetAttachmentCounter();
                    List<Models.Attachment> attachments = UploadService.UploadAttachment(attachmentInfo.ResponseId, Attachments.counter, attachmentInfo.Answers);
                    var result =  await this.AttachmentProvider.PostAttachmentAsync(attachments);
                    if (result.IsSuccess)
                    {
                        return Ok(result.Attachments);
                    }
                    return NoContent();
                }
                return BadRequest();
            }
            catch (Exception ex)
            {
                return BadRequest($"Internal server error: {ex}");
            }
        }
        /// <summary>
        /// Modify an new attachment.
        /// </summary>
        [Authorize(Roles = "admin")]
        [HttpPut("attachments"), DisableRequestSizeLimit]
        public async Task<IActionResult> UpdateAttachmentAsync(AttachmentInfo attachmentInfo)
        {
            try
            {
                if (attachmentInfo.Answers.Count > 0)
                {
                    var res =  await this.AttachmentProvider.GetAttachmentInfo(attachmentInfo.Answers);
                    if (res.IsSuccess)
                    {
                        List<Models.Attachment> attachments = UploadService.UpdateAttachments(attachmentInfo.ResponseId, attachmentInfo.Answers, res.Attachments);
                        var result = await this.AttachmentProvider.PutAttachmentAsync(attachments);
                        if (result.IsSuccess)
                        {
                            return Ok(result.Attachments);
                        }
                        return NoContent();
                    }
                    return NoContent();
                }
                return BadRequest();
            }
            catch (Exception ex)
            {
                return BadRequest($"Internal server error: {ex}");
            }
        }
        /// <summary>
        /// download an existing attachment.
        /// </summary>
        [Authorize(Roles = "admin")]
        [HttpGet("attachments/download/{id}")]
        public async Task<IActionResult> downloadfile(int id)
        {
            try
            {
                var result = await this.AttachmentProvider.GetDownloadAttachmentAsync(id);
                if (!result.IsSuccess)
                    return NotFound();
                string path = await UploadService.GetFile(result.Attachment.URI);
                if (path == null)
                    return NotFound();
                var contentType = GetContentType(result.Attachment.FileName);
                if (contentType == "application/octet-stream")
                    return PhysicalFile(path, contentType, result.Attachment.FileName);
                return PhysicalFile(path, contentType, enableRangeProcessing: true);// result.Attachment.FileName);
            }
            catch (Exception ex)
            {
                // Handle the exception here or log it
                return StatusCode(500, "An error occurred: " + ex.Message);
            }
            //try
            //{
            //    var result = await this.AttachmentProvider.GetDownloadAttachmentAsync(id);
            //    if(!result.IsSuccess) 
            //        return NotFound();
            //    byte[] fileContent = await UploadService.DownloadFile(result.Attachment.URI);
            //    if (fileContent == null || fileContent.Length == 0)
            //        return NotFound();
            //    var contentType = "application/octet-stream";
            //    return File(fileContent, contentType, result.Attachment.FileName);
            //}
            //catch (Exception ex)
            //{
            //    // Handle the exception here or log it
            //    return StatusCode(500, "An error occurred: " + ex.Message);
            //}
        }
        private string GetContentType(string fileName)
        {
            // You can add more content types based on the file extensions
            switch (Path.GetExtension(fileName).ToLower())
            {
                //case ".txt":
                //    return "text/plain";
                case ".jpg":
                case ".jpeg":
                    return "image/jpeg";
                case ".png":
                    return "image/png";
                case ".gif":
                    return "image/gif";
                case ".bmp":
                    return "image/bmp";
                case ".webp":
                    return "image/webp";
                case ".csv":
                    return "text/csv";
                case ".pdf":
                    return "application/pdf";
                case ".docx":
                case ".doc":
                    return "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
                case ".xlsx":
                case ".xls":
                    return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                // Add more cases as needed
                default:
                    return "application/octet-stream";
            }
        }
        /// <summary>
        /// Delete an existing attachment.
        /// </summary>
        [Authorize(Roles = "admin")]
        [HttpDelete("attachments/{id}")]
        public async Task<IActionResult> DeleteAttachment(int id)
        {
            // database soft delete
            var result = await this.AttachmentProvider.DeleteAttachmentAsync(id);
            if (result.IsSuccess)
            {
                // deleting file from folder
                UploadService.Movefile(result.Attachment.URI);
                return Ok(result.Attachment);
            }
            return NotFound();
        }

    }
}