using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using AMESCoreStudio.WebApi;
using AMESCoreStudio.WebApi.Models.AMES;

namespace AMESCoreStudio.WebApi.Controllers.AMES
{
    /// <summary>
    /// 異常類別維護
    /// </summary>
    [Route("api/[controller]")]
    [ApiController]
    public class ErrorClassesController : ControllerBase
    {
        private readonly AMESContext _context;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="context"></param>
        public ErrorClassesController(AMESContext context)
        {
            _context = context;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        // GET: api/ErrorClasses
        [HttpGet]
        public async Task<ActionResult<IEnumerable<ErrorClass>>> GetErrorClass()
        {
            IQueryable<ErrorClass> q = _context.ErrorClasses;
            q = q.OrderBy(p => p.ClassNo);

            var errorClass = await q.ToListAsync();

            return errorClass;
        }

        /// <summary>
        /// 根据異常群組代碼NO獲取該群組異常類別資料
        /// </summary>
        /// <param name="no"></param>
        /// <returns></returns>
        // GET: api/ErrorClasses/Group/S
        [HttpGet("Group/{no}")]
        public async Task<ActionResult<IEnumerable<ErrorClass>>> GetErrorClassByGroup(string no)
        {
            IQueryable<ErrorClass> q = _context.ErrorClasses;

            if (no != null)
            {
                if (no != "*")
                {
                    q = q.Where(p => p.GroupNo.Equals(no));
                }
            }
            q = q.OrderBy(p => p.GroupNo + p.ClassNo);

            var errorClass = await q.ToListAsync();

            if (errorClass == null)
            {
                return NotFound();
            }

            return errorClass;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        // GET: api/ErrorClasses/5
        [HttpGet("{id}")]
        public async Task<ActionResult<IEnumerable<ErrorClass>>> GetErrorClass(string id)
        {
            IQueryable<ErrorClass> q = _context.ErrorClasses;
            q = q.Where(p => p.ClassNo.Equals(id));

            var errorClass = await q.ToListAsync();

            if (errorClass == null)
            {
                return NotFound();
            }

            return errorClass;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="id"></param>
        /// <param name="errorClass"></param>
        /// <returns></returns>
        // PUT: api/ErrorClasses/5
        // To protect from overposting attacks, enable the specific properties you want to bind to, for
        // more details, see https://go.microsoft.com/fwlink/?linkid=2123754.
        [HttpPut("{id}")]
        public async Task<ActionResult<ErrorClass>> PutErrorClass(string id, [FromBody] ErrorClass errorClass)
        {
            if (id != errorClass.ClassNo)
            {
                return BadRequest();
            }

            _context.Entry(errorClass).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!ErrorClassExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return errorClass;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="errorClass"></param>
        /// <returns></returns>
        // POST: api/ErrorClasses
        // To protect from overposting attacks, enable the specific properties you want to bind to, for
        // more details, see https://go.microsoft.com/fwlink/?linkid=2123754.
        [HttpPost]
        public async Task<ActionResult<ErrorClass>> PostErrorClass([FromBody] ErrorClass errorClass)
        {
            _context.ErrorClasses.Add(errorClass);
            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateException)
            {
                if (ErrorClassExists(errorClass.ClassNo))
                {
                    return Conflict();
                }
                else
                {
                    throw;
                }
            }

            return CreatedAtAction("GetErrorClass", new { id = errorClass.ClassNo }, errorClass);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        // DELETE: api/ErrorClasses/5
        [HttpDelete("{id}")]
        public async Task<ActionResult<ErrorClass>> DeleteErrorClass(string id)
        {
            var errorClass = await _context.ErrorClasses.Where(p => p.ClassNo == id).FirstOrDefaultAsync();
            if (errorClass == null)
            {
                return NotFound();
            }

            _context.ErrorClasses.Remove(errorClass);
            await _context.SaveChangesAsync();

            return errorClass;
        }

        private bool ErrorClassExists(string id)
        {
            return _context.ErrorClasses.Any(e => e.ClassNo == id);
        }
    }
}