using Api.SeaHavenIndustries.DTOs;
using Data.SeaHavenIndustries;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace Api.SeaHavenIndustries.Controllers
{
    [Authorize]
    [ApiController]
    [Route("api/[controller]")]
    [Route("api/vendors")]
    public class VendorController : Controller
    {
        private readonly ApplicationDbContext _db;
        private readonly Helper.ZipCodeDistance _zipDistance;

        public VendorController(ApplicationDbContext db, Helper.ZipCodeDistance zipDistance)
        {
            _db = db;
            _zipDistance = zipDistance;
        }

        [HttpGet("GetVendorList")]
        public IActionResult GetVendorList(string? search = "", int page = 1, int pageSize = 10)
        {
            var query = _db.Vendors.Where(v => v.IsActive);

            if (!string.IsNullOrWhiteSpace(search))
            {
                var s = search.ToLower();
                query = query.Where(v =>
                    (v.CompanyName ?? "").ToLower().Contains(s) ||
                    (v.ContactName ?? "").ToLower().Contains(s) ||
                    (v.Email ?? "").ToLower().Contains(s) ||
                    (v.TradeSpecialties ?? "").ToLower().Contains(s));
            }

            var totalCount = query.Count();

            var data = query.OrderByDescending(v => v.Id)
                .Skip((page - 1) * pageSize)
                .Take(pageSize)
                .Select(v => new
                {
                    v.Id,
                    v.CompanyName,
                    v.ContactName,
                    v.Email,
                    v.Phone,
                    v.TradeSpecialties,
                    v.IsActive
                })
                .ToList();

            return Ok(new Pagination_DTO
            {
                Data = data,
                PageNumber = page,
                PageSize = pageSize,
                TotalCount = totalCount,
                TotalPages = (int)Math.Ceiling(totalCount / (double)pageSize)
            });
        }

        [HttpGet("{id}")]
        public async Task<IActionResult> GetVendorById(int id)
        {
            var vendor = await _db.Vendors.Where(v => v.Id == id).Select(v => new
            {
                v.Id,
                v.CompanyName,
                v.ContactName,
                v.Email,
                v.Phone,
                v.Address,
                v.City,
                v.State,
                v.Zip,
                v.TradeSpecialties,
                v.IsActive
            }).FirstOrDefaultAsync();

            if (vendor == null)
                return NotFound(new Response { Status = "Error", Message = "Vendor not found" });

            return Ok(vendor);
        }

        [HttpPost]
        public async Task<IActionResult> Create([FromBody] Vendor_DTO model)
        {
            try
            {
                var vendor = new Vendor
                {
                    CompanyName = model.CompanyName,
                    ContactName = model.ContactName,
                    Email = model.Email,
                    Phone = model.Phone,
                    Address = model.Address,
                    City = model.City,
                    State = model.State,
                    Zip = model.Zip,
                    TradeSpecialties = model.TradeSpecialties,
                    IsActive = model.IsActive
                };
                _db.Vendors.Add(vendor);
                await _db.SaveChangesAsync();
                return Ok(new DataResponse { Message = "Vendor Created", Status = "200" });
            }
            catch (Exception ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPut("{id}")]
        public async Task<IActionResult> Update(int id, [FromBody] EditVendor_DTO model)
        {
            try
            {
                var exist = await _db.Vendors.FindAsync(id);
                if (exist == null)
                    return BadRequest(new Response { Status = "Error", Message = "Vendor not found" });

                exist.CompanyName = model.CompanyName;
                exist.ContactName = model.ContactName;
                exist.Email = model.Email;
                exist.Phone = model.Phone;
                exist.Address = model.Address;
                exist.City = model.City;
                exist.State = model.State;
                exist.Zip = model.Zip;
                exist.TradeSpecialties = model.TradeSpecialties;
                exist.IsActive = model.IsActive;

                await _db.SaveChangesAsync();
                return Ok(new DataResponse { Message = "Vendor Updated", Status = "200" });
            }
            catch (Exception ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpDelete("{id}")]
        public async Task<IActionResult> Delete(int id)
        {
            var exist = await _db.Vendors.FindAsync(id);
            if (exist == null)
                return BadRequest(new Response { Status = "Error", Message = "Vendor not found" });

            _db.Vendors.Remove(exist);
            await _db.SaveChangesAsync();
            return Ok(new DataResponse { Message = "Vendor Deleted", Status = "200" });
        }

        [HttpGet("Dropdown")]
        public async Task<IActionResult> GetDropdown([FromQuery] string? trade = null, [FromQuery] string? siteZip = null)
        {
            var query = _db.Vendors.Where(v => v.IsActive);

            var vendors = await query.OrderBy(v => v.CompanyName)
                .Select(v => new
                {
                    v.Id,
                    v.CompanyName,
                    v.TradeSpecialties,
                    v.Address,
                    v.City,
                    v.State,
                    v.Zip
                })
                .ToListAsync();

            var result = vendors.Select(v =>
            {
                var distance = _zipDistance.GetDistanceMiles(siteZip, v.Zip);
                var addr = new[] { v.Address, v.City, v.State, v.Zip }
                    .Where(s => !string.IsNullOrWhiteSpace(s));
                return new
                {
                    v.Id,
                    v.CompanyName,
                    v.TradeSpecialties,
                    address = string.Join(", ", addr),
                    distanceMiles = distance.HasValue ? Math.Round(distance.Value, 1) : (double?)null
                };
            }).ToList();

            if (!string.IsNullOrWhiteSpace(trade))
            {
                var tradeMatched = result.Where(v => (v.TradeSpecialties ?? "").Contains(trade)).ToList();
                var rest = result.Where(v => !(v.TradeSpecialties ?? "").Contains(trade)).ToList();
                result = tradeMatched.Concat(rest).ToList();
            }

            if (!string.IsNullOrWhiteSpace(siteZip))
            {
                result = result.OrderBy(v => v.distanceMiles ?? 99999).ToList();
            }

            return Ok(result);
        }
    }
}