using Api.SeaHavenIndustries.DTOs;
using Api.SeaHavenIndustries.Helper;
using Data.SeaHavenIndustries;
using FluentValidation;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using SeaHaven.Services.Interfaces;
using SeaHaven.Services.DTOs;
using System.Security.Claims;

namespace Api.SeaHavenIndustries.Controllers
{
    [Authorize]
    [ApiController]
    [Route("api/[controller]")]
    [Route("api/vendors")]
    public class VendorController : Controller
    {
        private readonly IVendorService _vendorService;
        private readonly ILogger<VendorController> _logger;

        public VendorController(IVendorService vendorService, ILogger<VendorController> logger)
        {
            _vendorService = vendorService;
            _logger = logger;
        }

        // SH-198 legacy per-technician directory contract. Existing consumers depend
        // on one row per technician (no grouped Technicians) and on raw pagination
        // semantics, including pageSize values above the grouped-directory bound.
        [HttpGet("GetVendorList")]
        public async Task<IActionResult> GetVendorList(
            string? search = "",
            int page = 1,
            int pageSize = 10,
            bool? isActive = true,
            [FromQuery] string[]? companies = null,
            [FromQuery] string[]? trades = null,
            [FromQuery] string[]? locations = null,
            [FromQuery] string[]? jobBuckets = null,
            CancellationToken cancellationToken = default)
        {
            var pagedResult = await _vendorService.GetVendorTechnicianDirectoryPagedAsync(
                page,
                pageSize,
                search,
                isActive,
                companies,
                trades,
                locations,
                jobBuckets,
                cancellationToken);

            var data = pagedResult.Items.Select(v => new
            {
                v.Id,
                CompanyName = v.CompanyName,
                v.CompanyId,
                v.ContactName,
                v.Email,
                v.Phone,
                v.CompanyPhone,
                v.PreferredContact,
                v.Address,
                v.City,
                v.State,
                Zip = v.Zipcode,
                v.TradeSpecialties,
                v.GoogleMapsUrl,
                v.Notes,
                v.IsActive,
                v.TotalJobs
            });

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

        // SH-281 company-grouped directory: one row per company with the full
        // status-eligible technician roster nested under Technicians and bounded
        // page sizes. Top-level Email is the company email; technician emails stay
        // on the nested rows.
        [HttpGet("GetVendorDirectoryList")]
        public async Task<IActionResult> GetVendorDirectoryList(
            string? search = "",
            int page = 1,
            int pageSize = 10,
            bool? isActive = true,
            [FromQuery] string[]? companies = null,
            [FromQuery] string[]? trades = null,
            [FromQuery] string[]? locations = null,
            [FromQuery] string[]? jobBuckets = null,
            [FromQuery] string[]? areas = null,
            CancellationToken cancellationToken = default)
        {
            var pagedResult = await _vendorService.GetVendorCompanyDirectoryPagedAsync(
                page,
                pageSize,
                search,
                isActive,
                companies,
                trades,
                locations,
                jobBuckets,
                areas,
                cancellationToken);

            var data = pagedResult.Items.Select(v => new
            {
                v.Id,
                CompanyName = v.CompanyName,
                v.CompanyId,
                v.ContactName,
                v.Email,
                v.Phone,
                v.CompanyPhone,
                v.PreferredContact,
                v.Address,
                v.City,
                v.State,
                Zip = v.Zipcode,
                v.TradeSpecialties,
                v.GoogleMapsUrl,
                v.Notes,
                v.IsActive,
                v.TotalJobs,
                v.AreaId,
                v.AreaName,
                Technicians = v.Technicians.Select(t => new
                {
                    t.Id,
                    t.ContactName,
                    t.Email,
                    t.Phone,
                    t.PreferredContact,
                    t.TradeSpecialties,
                    t.IsActive,
                    t.TotalJobs
                })
            });

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

        [HttpGet("{id}")]
        [HttpGet("GetById")]
        public async Task<IActionResult> GetVendorById([FromRoute] int? id, [FromQuery(Name = "id")] int? queryId)
        {
            var vendorId = id ?? queryId;
            if (vendorId == null)
                return BadRequest(new Response { Status = "Error", Message = "Id is required" });

            var vendor = await _vendorService.GetVendorByIdAsync(vendorId.Value);

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

            return Ok(new
            {
                vendor.Id,
                CompanyName = vendor.Name,
                vendor.CompanyId,
                vendor.ContactName,
                vendor.Email,
                vendor.Phone,
                vendor.CompanyPhone,
                vendor.PreferredContact,
                vendor.Address,
                vendor.City,
                vendor.State,
                Zip = vendor.Zipcode,
                vendor.TradeSpecialties,
                vendor.GoogleMapsUrl,
                vendor.Notes,
                vendor.IsActive,
                vendor.TotalJobs
            });
        }

        [HttpPost]
        [HttpPost("Create")]
        public async Task<IActionResult> Create([FromBody] Vendor_DTO model)
        {
            try
            {
                var createDto = new CreateVendorDTO
                {
                    Name = model.CompanyName ?? throw new ArgumentException("CompanyName is required"),
                    CompanyId = model.CompanyId,
                    ContactName = model.ContactName,
                    Email = model.Email,
                    Phone = model.Phone,
                    CompanyPhone = model.CompanyPhone,
                    PreferredContact = model.PreferredContact,
                    Address = model.Address,
                    City = model.City,
                    State = model.State,
                    Zipcode = model.Zip,
                    TradeSpecialties = model.TradeSpecialties,
                    GoogleMapsUrl = model.GoogleMapsUrl,
                    Notes = model.Notes,
                    IsActive = model.IsActive ?? true
                };

                var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
                if (userId == null)
                    return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });

                await _vendorService.CreateVendorAsync(createDto, userId);
                return Ok(new DataResponse { Message = "Vendor Created", Status = "200" });
            }
            catch (ValidationException vex)
            {
                var errors = string.Join(", ", vex.Errors.Select(e => e.ErrorMessage));
                return BadRequest(new Response { Status = "Validation Error", Message = errors });
            }
            catch (Exception ex)
            {
                return StatusCode(500, new Response { Status = "Error", Message = _logger.Sanitize(ex) });
            }
        }

        [HttpPut("{id}")]
        [HttpPost("Update")]
        public async Task<IActionResult> Update([FromRoute] int? id, [FromBody] EditVendor_DTO model)
        {
            try
            {
                // For named route, id comes from model
                int vendorId = id ?? model.Id;
                if (vendorId == 0)
                    return BadRequest(new Response { Status = "Error", Message = "Vendor Id is required" });

                var updateDto = new UpdateVendorDTO
                {
                    Name = model.CompanyName,
                    CompanyId = model.CompanyId,
                    ContactName = model.ContactName,
                    Email = model.Email,
                    Phone = model.Phone,
                    CompanyPhone = model.CompanyPhone,
                    PreferredContact = model.PreferredContact,
                    Address = model.Address,
                    City = model.City,
                    State = model.State,
                    Zipcode = model.Zip,
                    TradeSpecialties = model.TradeSpecialties,
                    GoogleMapsUrl = model.GoogleMapsUrl,
                    Notes = model.Notes,
                    IsActive = model.IsActive,
                    ConfirmOpenWorkOrders = model.ConfirmOpenWorkOrders
                };

                var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
                if (userId == null)
                    return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });

                await _vendorService.UpdateVendorAsync(vendorId, updateDto, userId);
                return Ok(new DataResponse { Message = "Vendor Updated", Status = "200" });
            }
            catch (ValidationException vex)
            {
                var errors = string.Join(", ", vex.Errors.Select(e => e.ErrorMessage));
                return BadRequest(new Response { Status = "Validation Error", Message = errors });
            }
            catch (VendorDeactivationBlockedException dbex)
            {
                return Conflict(new
                {
                    Status = "Conflict",
                    Message = _logger.Sanitize(dbex, "Vendor cannot be deactivated because it has open work orders"),
                    OpenWorkOrders = dbex.OpenWorkOrders
                });
            }
            catch (InvalidOperationException)
            {
                return NotFound(new Response { Status = "Error", Message = "Vendor not found" });
            }
            catch (Exception ex)
            {
                return StatusCode(500, new Response { Status = "Error", Message = _logger.Sanitize(ex) });
            }
        }

        [HttpDelete("{id}")]
        [HttpPost("Delete")]
        public async Task<IActionResult> Delete(
            [FromRoute] int? id,
            [FromQuery(Name = "id")] int? queryId = null,
            [FromQuery] bool confirmOpenWorkOrders = false)
        {
            try
            {
                // Support both route parameter and query string
                int vendorId = id ?? queryId ?? 0;
                if (vendorId == 0)
                    return BadRequest(new Response { Status = "Error", Message = "Vendor Id is required" });

                var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
                if (userId == null)
                    return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });

                await _vendorService.DeleteVendorAsync(vendorId, userId, confirmOpenWorkOrders);
                return Ok(new DataResponse { Message = "Vendor Deactivated", Status = "200" });
            }
            catch (VendorDeactivationBlockedException dbex)
            {
                return Conflict(new
                {
                    Status = "Conflict",
                    Message = _logger.Sanitize(dbex, "Vendor cannot be deactivated because it has open work orders"),
                    OpenWorkOrders = dbex.OpenWorkOrders
                });
            }
            catch (InvalidOperationException)
            {
                return NotFound(new Response { Status = "Error", Message = "Vendor not found" });
            }
            catch (Exception ex)
            {
                return StatusCode(500, new Response { Status = "Error", Message = _logger.Sanitize(ex) });
            }
        }

        [HttpGet("{id:int}/deactivation-impact")]
        public async Task<IActionResult> GetDeactivationImpact(int id)
        {
            try
            {
                var impact = await _vendorService.GetDeactivationImpactAsync(id);
                return Ok(impact);
            }
            catch (InvalidOperationException)
            {
                return NotFound(new Response { Status = "Error", Message = "Vendor not found" });
            }
            catch (Exception ex)
            {
                return StatusCode(500, new Response { Status = "Error", Message = _logger.Sanitize(ex) });
            }
        }

        [HttpPut("{id:int}/work-order-update")]
        public async Task<IActionResult> UpdateFromWorkOrder(int id, [FromBody] WorkOrderVendorUpdate_DTO model)
        {
            try
            {
                if (model == null || model.WorkOrderId <= 0)
                    return BadRequest(new Response { Status = "Error", Message = "A valid workOrderId is required" });

                var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
                if (userId == null)
                    return Unauthorized(new Response { Status = "Error", Message = "User not authenticated" });

                var dto = new WorkOrderVendorUpdateDTO
                {
                    WorkOrderId = model.WorkOrderId,
                    ContactName = model.ContactName,
                    PreferredContact = model.PreferredContact,
                    Phone = model.Phone,
                    Email = model.Email,
                    Notes = model.Notes
                };

                var result = await _vendorService.UpdateVendorFromWorkOrderAsync(id, dto, userId);
                return Ok(result);
            }
            catch (ValidationException vex)
            {
                var errors = string.Join(", ", vex.Errors.Select(e => e.ErrorMessage));
                return BadRequest(new Response { Status = "Validation Error", Message = errors });
            }
            catch (InvalidOperationException)
            {
                return NotFound(new Response { Status = "Error", Message = "Vendor or work order link not found" });
            }
            catch (Exception ex)
            {
                return StatusCode(500, new Response { Status = "Error", Message = _logger.Sanitize(ex) });
            }
        }

        [HttpGet("Dropdown")]
        public async Task<IActionResult> GetDropdown([FromQuery] string? trade = null, [FromQuery] string? siteZip = null, CancellationToken cancellationToken = default)
        {
            var result = await _vendorService.GetDropdownAsync(trade, siteZip, cancellationToken);
            return Ok(result);
        }

        [HttpGet("facets")]
        public async Task<IActionResult> GetFacets([FromQuery] bool? isActive = null, CancellationToken cancellationToken = default)
        {
            var result = await _vendorService.GetFacetsAsync(isActive, cancellationToken);
            return Ok(result);
        }

        [HttpGet("{id:int}/portal-token")]
        public async Task<IActionResult> GetPortalToken(int id, CancellationToken cancellationToken = default)
        {
            var result = await _vendorService.GetPortalTokenAsync(id, cancellationToken);
            if (result == null) return NotFound();
            return Ok(result);
        }

        [HttpPost("{id:int}/portal-token/rotate")]
        public async Task<IActionResult> RotatePortalToken(int id, CancellationToken cancellationToken = default)
        {
            var result = await _vendorService.RotatePortalTokenAsync(id, cancellationToken);
            if (result == null) return NotFound();
            return Ok(result);
        }

        [HttpPost("{id:int}/portal-token/revoke")]
        public async Task<IActionResult> RevokePortalToken(int id, CancellationToken cancellationToken = default)
        {
            var success = await _vendorService.RevokePortalTokenAsync(id, cancellationToken);
            if (!success) return NotFound();
            return Ok(new { revoked = true });
        }
    }
}