using Data.SeaHavenIndustries;
using Microsoft.AspNetCore.Mvc;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Interfaces;

namespace Api.SeaHavenIndustries.Controllers
{
    [ApiController]
    [Route("api/vendor-portal")]
    [Route("api/vendorportal")]
    public class VendorPortalController : Controller
    {
        private const string TokenHeader = "X-Vendor-Token";

        private readonly IVendorPortalService _portalService;

        public VendorPortalController(IVendorPortalService portalService)
        {
            _portalService = portalService;
        }

        [HttpGet("session")]
        public async Task<IActionResult> Session(CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            return Ok(new DataResponse
            {
                Status = "Success",
                Data = session
            });
        }

        [HttpGet("dispatches")]
        public async Task<IActionResult> ListDispatches([FromQuery] string? status = null, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            var dispatches = await _portalService.ListDispatchesAsync(session, status, cancellationToken);
            return Ok(new DataResponse { Status = "Success", Data = dispatches });
        }

        [HttpGet("dispatches/{id:int}")]
        public async Task<IActionResult> GetDispatch(int id, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            var detail = await _portalService.GetDispatchDetailAsync(session, id, cancellationToken);
            if (detail == null) return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });

            return Ok(new DataResponse { Status = "Success", Data = detail });
        }

        [HttpPost("dispatches/{id:int}/accept")]
        public async Task<IActionResult> Accept(int id, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                var result = await _portalService.AcceptDispatchAsync(session, id, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPost("dispatches/{id:int}/status")]
        public async Task<IActionResult> ChangeStatus(int id, [FromBody] ChangeStatusRequest body, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                var result = await _portalService.ChangeStatusAsync(session, id, body?.Status, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPost("dispatches/{id:int}/request-cancel")]
        public async Task<IActionResult> RequestCancel(int id, [FromBody] RequestCancelRequest body, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                await _portalService.RequestCancelAsync(session, id, body?.Reason, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Message = "Cancel request sent to dispatcher" });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPost("dispatches/{id:int}/checklist/{itemId:int}")]
        public async Task<IActionResult> UpdateChecklistItem(int id, int itemId, [FromBody] ChecklistUpdateRequest body, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                var result = await _portalService.UpdateChecklistItemAsync(session, id, itemId, body.IsCompleted, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPost("dispatches/{id:int}/signoff")]
        public async Task<IActionResult> AddSignoff(int id, [FromBody] SignoffRequest body, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                var result = await _portalService.AddSignoffAsync(session, id, body?.SignoffType, body?.Name, body?.Signature, body?.SignatureMethod, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPost("dispatches/{id:int}/comments")]
        public async Task<IActionResult> AddComment(int id, [FromBody] CommentRequest body, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                var result = await _portalService.AddCommentAsync(session, id, body?.CommentText, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPost("dispatches/{id:int}/uplift-request")]
        public async Task<IActionResult> RequestUplift(int id, [FromBody] UpliftRequestBody body, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                var result = await _portalService.RequestUpliftAsync(session, id, body?.RequestedNTE ?? 0m, body?.Reason, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        [HttpPost("dispatches/{id:int}/uplift-request/{requestId:int}/cancel")]
        public async Task<IActionResult> CancelUpliftRequest(int id, int requestId, CancellationToken cancellationToken = default)
        {
            var session = await ResolveSessionAsync(cancellationToken);
            if (session == null) return Unauthorized(new Response { Status = "Error", Message = "Invalid or expired token" });

            try
            {
                var result = await _portalService.CancelUpliftRequestAsync(session, id, requestId, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException)
            {
                return NotFound(new Response { Status = "Error", Message = "Dispatch not found" });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = ex.Message });
            }
        }

        private async Task<VendorPortalSession?> ResolveSessionAsync(CancellationToken cancellationToken)
        {
            if (!Request.Headers.TryGetValue(TokenHeader, out var values)) return null;
            var token = values.ToString();
            return await _portalService.ResolveSessionAsync(token, cancellationToken);
        }

        public class ChangeStatusRequest
        {
            public string? Status { get; set; }
        }

        public class RequestCancelRequest
        {
            public string? Reason { get; set; }
        }

        public class ChecklistUpdateRequest
        {
            public bool IsCompleted { get; set; }
        }

        public class SignoffRequest
        {
            public string? Name { get; set; }
            public string? Signature { get; set; }
            public string? SignatureMethod { get; set; }
            public string? SignoffType { get; set; }
        }

        public class CommentRequest
        {
            public string? CommentText { get; set; }
        }

        public class UpliftRequestBody
        {
            public decimal RequestedNTE { get; set; }
            public string? Reason { get; set; }
        }
    }
}