using LogisticsApp.Server.Data;
using LogisticsApp.Server.DTOs;
using LogisticsApp.Server.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace LogisticsApp.Server.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class WaybillEntriesController : ControllerBase
    {
        private readonly ApplicationDbContext _context;

        public WaybillEntriesController(ApplicationDbContext context)
        {
            _context = context;
        }

        // GET: api/waybillentries
        [Authorize]
        [HttpGet]
        public async Task<ActionResult<ApiResponse<List<WaybillEntry>>>> GetWaybillEntries()
        {
            try
            {
                var entries = await _context.WaybillEntries
                    .OrderByDescending(w => w.Date)
                    .ThenBy(w => w.StartTime)
                    .ToListAsync();

                return Ok(new ApiResponse<List<WaybillEntry>>(true, "Waybill entries retrieved successfully", entries));
            }
            catch (Exception ex)
            {
                return StatusCode(500, new ApiResponse<string>(false, $"Internal server error: {ex.Message}"));
            }
        }

        // GET: api/waybillentries/5
        [Authorize]
        [HttpGet("{id}")]
        public async Task<ActionResult<ApiResponse<WaybillEntry>>> GetWaybillEntry(int id)
        {
            try
            {
                var waybillEntry = await _context.WaybillEntries
                    .FirstOrDefaultAsync(w => w.Id == id);

                if (waybillEntry == null)
                {
                    return NotFound(new ApiResponse<string>(false, "Waybill entry not found"));
                }

                return Ok(new ApiResponse<WaybillEntry>(true, "Waybill entry retrieved successfully", waybillEntry));
            }
            catch (Exception ex)
            {
                return StatusCode(500, new ApiResponse<string>(false, $"Internal server error: {ex.Message}"));
            }
        }

        // POST: api/waybillentries
        [Authorize]
        [HttpPost]
        public async Task<ActionResult<ApiResponse<WaybillEntry>>> PostWaybillEntry(WaybillEntry waybillEntry)
        {
            try
            {
 
                if (waybillEntry.VehicleId <= 0)
                {
                    return BadRequest(new ApiResponse<string>(false, "Valid VehicleId is required"));
                }

                if (waybillEntry.OrderId <= 0)
                {
                    return BadRequest(new ApiResponse<string>(false, "Valid OrderId is required"));
                }

       
                var vehicleExists = await _context.Vehicles.AnyAsync(v => v.Id == waybillEntry.VehicleId);
                if (!vehicleExists)
                {
                    return BadRequest(new ApiResponse<string>(false, "Vehicle not found"));
                }

                var orderExists = await _context.Orders.AnyAsync(o => o.Id == waybillEntry.OrderId);
                if (!orderExists)
                {
                    return BadRequest(new ApiResponse<string>(false, "Order not found"));
                }

                if (string.IsNullOrEmpty(waybillEntry.StartTime) || !IsValidTimeFormat(waybillEntry.StartTime))
                {
                    return BadRequest(new ApiResponse<string>(false, "StartTime must be in HH:mm format"));
                }

                if (string.IsNullOrEmpty(waybillEntry.EndTime) || !IsValidTimeFormat(waybillEntry.EndTime))
                {
                    return BadRequest(new ApiResponse<string>(false, "EndTime must be in HH:mm format"));
                }

                waybillEntry.CreatedAt = DateTime.UtcNow;
                _context.WaybillEntries.Add(waybillEntry);
                await _context.SaveChangesAsync();

                var createdEntry = await _context.WaybillEntries
                    .FirstOrDefaultAsync(w => w.Id == waybillEntry.Id);

                return CreatedAtAction("GetWaybillEntry", new { id = waybillEntry.Id },
                    new ApiResponse<WaybillEntry>(true, "Waybill entry created successfully", createdEntry));
            }
            catch (Exception ex)
            {
                return StatusCode(500, new ApiResponse<string>(false, $"Internal server error: {ex.Message}"));
            }
        }

        // PUT: api/waybillentries/5
        [Authorize]
        [HttpPut("{id}")]
        public async Task<ActionResult<ApiResponse<WaybillEntry>>> PutWaybillEntry(int id, WaybillEntry waybillEntry)
        {
            try
            {
                if (id != waybillEntry.Id)
                {
                    return BadRequest(new ApiResponse<string>(false, "ID mismatch"));
                }


                if (waybillEntry.VehicleId <= 0)
                {
                    return BadRequest(new ApiResponse<string>(false, "Valid VehicleId is required"));
                }

                if (waybillEntry.OrderId <= 0)
                {
                    return BadRequest(new ApiResponse<string>(false, "Valid OrderId is required"));
                }

                var vehicleExists = await _context.Vehicles.AnyAsync(v => v.Id == waybillEntry.VehicleId);
                if (!vehicleExists)
                {
                    return BadRequest(new ApiResponse<string>(false, "Vehicle not found"));
                }

                var orderExists = await _context.Orders.AnyAsync(o => o.Id == waybillEntry.OrderId);
                if (!orderExists)
                {
                    return BadRequest(new ApiResponse<string>(false, "Order not found"));
                }

                if (string.IsNullOrEmpty(waybillEntry.StartTime) || !IsValidTimeFormat(waybillEntry.StartTime))
                {
                    return BadRequest(new ApiResponse<string>(false, "StartTime must be in HH:mm format"));
                }

                if (string.IsNullOrEmpty(waybillEntry.EndTime) || !IsValidTimeFormat(waybillEntry.EndTime))
                {
                    return BadRequest(new ApiResponse<string>(false, "EndTime must be in HH:mm format"));
                }

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

                try
                {
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!WaybillEntryExists(id))
                    {
                        return NotFound(new ApiResponse<string>(false, "Waybill entry not found"));
                    }
                    else
                    {
                        throw;
                    }
                }

         
                var updatedEntry = await _context.WaybillEntries
                    .FirstOrDefaultAsync(w => w.Id == waybillEntry.Id);

                return Ok(new ApiResponse<WaybillEntry>(true, "Waybill entry updated successfully", updatedEntry));
            }
            catch (Exception ex)
            {
                return StatusCode(500, new ApiResponse<string>(false, $"Internal server error: {ex.Message}"));
            }
        }

        // DELETE: api/waybillentries/5
        [Authorize]
        [HttpDelete("{id}")]
        public async Task<ActionResult<ApiResponse<string>>> DeleteWaybillEntry(int id)
        {
            try
            {
                var waybillEntry = await _context.WaybillEntries.FindAsync(id);
                if (waybillEntry == null)
                {
                    return NotFound(new ApiResponse<string>(false, "Waybill entry not found"));
                }

                _context.WaybillEntries.Remove(waybillEntry);
                await _context.SaveChangesAsync();

                return Ok(new ApiResponse<string>(true, "Waybill entry deleted successfully"));
            }
            catch (Exception ex)
            {
                return StatusCode(500, new ApiResponse<string>(false, $"Internal server error: {ex.Message}"));
            }
        }

        private bool WaybillEntryExists(int id)
        {
            return _context.WaybillEntries.Any(e => e.Id == id);
        }

        private bool IsValidTimeFormat(string time)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(time, @"^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$");
        }
    }
}