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.BAS;

namespace AMESCoreStudio.WebApi.Controllers.BAS
{
    /// <summary>
    /// 流程規則資料維護
    /// </summary>
    [Route("api/[controller]")]
    [ApiController]
    public class RulesController : ControllerBase
    {
        private readonly AMESContext _context;

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

        /// <summary>
        /// 獲取全部流程規則資料
        /// </summary>
        /// <returns></returns>
        // GET: api/Rules
        [HttpGet]
        public async Task<ActionResult<IEnumerable<Rules>>> GetRules()
        {
            IQueryable<Rules> q = _context.Ruleses;
            q.OrderBy(p => p.RuleStationID + p.RuleSeq);

            var rules = await q.ToListAsync();

            foreach (var data in rules)
            {
                data.NextStation = _context.Stationses.Find(data.NextStationID);
            }

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

            return rules;
        }

        /// <summary>
        /// 根據流程ID獲取流程規則資料
        /// </summary>
        /// <returns></returns>
        // GET: api/Rules/Flow/5
        [HttpGet("Flow/{id}")]
        public async Task<ActionResult<IEnumerable<Rules>>> GetRulesByFlow(int id)
        {
            var query = from q1 in _context.Ruleses
                        join q2 in _context.RuleStations on q1.RuleStationID equals q2.RuleStationID
                        join q3 in _context.Stationses on q1.NextStationID equals q3.StationID
                        where q2.FlowRuleID.Equals(id)
                        select new {
                            q1.RuleStationID,
                            q1.RuleSeq,
                            q1.RuleStatus,
                            CurrStationId = q2.StationID,
                            NextStationId = q3.StationID
                        };
            //query = query.OrderBy(p => p.RuleStationID + p.RuleSeq);
            query = query.OrderBy(p => p.RuleSeq);

            var qdata = await query.ToListAsync();
            int[] list = new int[qdata.Count];
            int[] list1 = new int[qdata.Count];
            int[] list2 = new int[qdata.Count];
            string[] status1 = new string[qdata.Count];

            for (int i=0;i<list.Length;i++)
            {
                list[i] = qdata[i].RuleStationID;
                list1[i] = qdata[i].CurrStationId;
                list2[i] = qdata[i].NextStationId;
                status1[i] = qdata[i].RuleStatus;
            }

            IQueryable<Rules> q = _context.Ruleses;
            //q = q.Where(p => list.Contains(p.RuleStationID) && status1.Contains(p.RuleStatus));
            q = q.Where(p => list.Contains(p.RuleStationID));
            //q = q.OrderBy(o => o.RuleStationID + o.RuleSeq);
            q = q.OrderBy(o => o.RuleSeq);

            var rules = await q.ToListAsync();

            for(int j=0;j<rules.Count;j++)
            {
                //rules[j].CurrStation = _context.Stationses.Where(p1 => p1.StationID.Equals(list1[j])).FirstOrDefault();
                rules[j].RuleDesc = _context.Stationses.Where(p1 => p1.StationID.Equals(list1[j])).FirstOrDefault().StationName;
                rules[j].NextStation = _context.Stationses.Where(p2 => p2.StationID.Equals(list2[j])).FirstOrDefault();
            }

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

            return rules;
        }

        /// <summary>
        /// 根據流程站別ID查詢指定單一資料
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        // GET: api/Rules/5
        [HttpGet("{id}")]
        public async Task<ActionResult<IEnumerable<Rules>>> GetRules(int id)
        {
            IQueryable<Rules> q = _context.Ruleses;

            q = q.Where(p => p.RuleStationID.Equals(id));

            var rules = await q.ToListAsync();

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

            return rules;
        }

        /// <summary>
        /// 更新流程規則資料
        /// </summary>
        /// <param name="id"></param>
        /// <param name="rules"></param>
        /// <returns></returns>
        // PUT: api/Rules/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<Rules>> PutRules(int id, [FromBody]Rules rules)
        {
            if (id != rules.RuleStationID)
            {
                return BadRequest();
            }

            _context.Entry(rules).State = EntityState.Modified;
            rules.UpdateDate = DateTime.Now;

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

            return rules;
        }

        /// <summary>
        /// 新增流程規則資料
        /// </summary>
        /// <param name="rules"></param>
        /// <returns></returns>
        // POST: api/Rules
        // 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<Rules>> PostRules([FromBody] Rules rules)
        {
            rules.CreateDate = DateTime.Now;

            _context.Ruleses.Add(rules);
            await _context.SaveChangesAsync();
            
            return CreatedAtAction("GetRules", new { id = rules.RuleStationID }, rules);
        }

        /// <summary>
        /// 刪除流程規則資料
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        // DELETE: api/Rules/5
        [HttpDelete("{id}")]
        public async Task<ActionResult<Rules>> DeleteRules(int id)
        {
            var rules = await _context.Ruleses.FindAsync(id);
            if (rules == null)
            {
                return NotFound();
            }

            _context.Ruleses.Remove(rules);
            await _context.SaveChangesAsync();

            return rules;
        }

        private bool RulesExists(int id)
        {
            return _context.Ruleses.Any(e => e.RuleStationID == id);
        }
    }
}