!
! This file is part of SACAMOS, State of the Art CAble MOdels in Spice. 
! It was developed by the University of Nottingham and the Netherlands Aerospace 
! Centre (NLR) for ESA under contract number 4000112765/14/NL/HK.
! 
! Copyright (C) 2016-2017 University of Nottingham
! 
! SACAMOS is free software: you can redistribute it and/or modify it under the 
! terms of the GNU General Public License as published by the Free Software 
! Foundation, either version 3 of the License, or (at your option) any later 
! version.
! 
! SACAMOS is distributed in the hope that it will be useful, but 
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
! or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 
! for more details.
! 
! A copy of the GNU General Public License version 3 can be found in the 
! file GNU_GPL_v3 in the root or at <http://www.gnu.org/licenses/>.
! 
! SACAMOS uses the EISPACK library (in /SRC/EISPACK). EISPACK is subject to 
! the GNU Lesser General Public License. A copy of the GNU Lesser General Public 
! License version can be found in the file GNU_LGPL in the root of EISPACK 
! (/SRC/EISPACK ) or at <http://www.gnu.org/licenses/>.
! 
! The University of Nottingham can be contacted at: ggiemr@nottingham.ac.uk
!
! File Contents:
! SUBROUTINE Dconnector_set_parameters
! SUBROUTINE Dconnector_set_internal_domain_information
! SUBROUTINE Dconnector_plot
!
! NAME
!     Dconnector_set_parameters
!
! AUTHORS
!     Chris Smartt
!
! DESCRIPTION
!     Set the overall parameters for a Dconnector cable
!
! COMMENTS
!      
!
! HISTORY
!
!     started 12/4/2016 CJS 
!     20/5/2016 CJS Allow use of the Laplace solver in the internaln domain
!     16/11/2017 CJS Include network synthesis process to replace s-domain transfer functions
!
!
SUBROUTINE Dconnector_set_parameters(cable)

USE type_specifications

IMPLICIT NONE

! variables passed to subroutine

  type(cable_specification_type),intent(INOUT)    :: cable

! local variables

! START

  cable%cable_type=cable_geometry_type_Dconnector
  cable%tot_n_conductors=0        ! this is set in the cable specification file
  cable%tot_n_domains=2
  cable%n_external_conductors=1   
  cable%n_internal_conductors=0   ! this is set in the cable specification file
  cable%n_internal_domains=1
  cable%n_parameters=4
  cable%n_dielectric_filters=0
  cable%n_transfer_impedance_models=0

END SUBROUTINE Dconnector_set_parameters
!
! NAME
!     Dconnector_set_internal_domain_information
!
! AUTHORS
!     Chris Smartt
!
! DESCRIPTION
!     Set the overall parameters for a Dconnector cable
!
! COMMENTS
!     Set the dimension of the domain transformation matrices to include an external reference conductor for the cable 
!      
!
! HISTORY
!
!     started 12/4/201 CJS 
!     8/5/2017         CJS: Include references to Theory_Manual
!
!
SUBROUTINE Dconnector_set_internal_domain_information(cable)

USE type_specifications
USE constants
USE general_module
USE maths
USE PUL_parameter_module

IMPLICIT NONE

! variables passed to subroutine

  type(cable_specification_type),intent(INOUT)    :: cable

! local variables

  integer :: nc
  integer :: dim

  integer :: domain

  type(PUL_type)    :: PUL

  integer :: ierr
 
! variables for cable parameter checks 
  logical :: cable_spec_error
  real(dp) :: rw
  real(dp) :: p
  real(dp) :: s
  real(dp) :: o
  
! variables for cross section geometry

  integer  :: ncrow(2)  ! number of conductors in the two rows 
  real(dp) :: w(2)      ! width of the two rows of conductors
  integer  :: i
  
  character(LEN=error_message_length) :: message 
  
  character(LEN=2) :: conductor_string
 
! START

! Check the cable parameters
  
  nc=cable%tot_n_conductors 

  rw=cable%parameters(1)
  p=cable%parameters(2)
  s=cable%parameters(3)
  o=cable%parameters(4)
    
  cable_spec_error=.FALSE.    ! assume no errors initially
  message=''
  
! we must have 5 or more conductors in a D connector
  if (nc.LT.5) then
    message='ERROR: There must be 5 or more conductors in a D connector'
    write(*,'(A)')message
    cable_spec_error=.TRUE.
  end if
  
  CALL cylindrical_check(rw,cable_spec_error,cable%cable_name,message)
  CALL gt_zero_check(p,cable_spec_error,cable%cable_name,message)
  CALL gt_zero_check(s,cable_spec_error,cable%cable_name,message)
  CALL gt_zero_check(o,cable_spec_error,cable%cable_name,message)
  
  if (cable_spec_error) then       
    run_status='ERROR in cable_model_builder, error on parameters for cable:'//trim(cable%cable_name)//'. '//trim(message)
    CALL write_program_status()
    STOP 1
  end if
  
! set the information related to the number of conductors.
! Note that the number of conductors includes the shield which encloses the connector pins
  
  cable%n_internal_conductors=nc-1
  cable%n_external_conductors=1
      
! Set the parameters for the single internal domain  
  domain=1
      
  cable%n_internal_conductors_in_domain(domain)=nc
    
! The number of modes in the internal domain is nc-1

  dim=nc-1
  cable%L_domain(domain)%dim=dim
  ALLOCATE(cable%L_domain(domain)%mat(dim,dim))
  cable%C_domain(domain)%dim=dim
  ALLOCATE(cable%C_domain(domain)%mat(dim,dim))
  
  if (use_laplace) then
  
! allocate memory for the PUL parameter solver interface

    if(verbose) write(*,*)'Domain:',domain
    if(verbose) write(*,*)'Allocating PUL data structure for Dconnector'
    
    CALL allocate_and_reset_PUL_data(PUL,nc)
        
    PUL%shape(1:nc-1)=circle

! work out the number of conductors in the two rows    
    ncrow(1)=nc/2
    ncrow(2)=(nc-1)-ncrow(1)
    
    write(*,*)'Connector model: nc1=',ncrow(1),' nc2=',ncrow(2)
    
! width of the two rows of conductors    
    w(1)=(ncrow(1)-1)*p
    w(2)=(ncrow(2)-1)*p

! top row conductors
    do i=1,ncrow(1)    
    
      PUL%x(i)=-w(1)/2d0+(i-1)*p
      PUL%y(i)=s/2d0
      PUL%r(i)=rw
      PUL%rd(i)=rw
      PUL%epsr(i)=1d0    ! no dielectric on conductors, they are in a homogeneous dielectric medium
    
    end do

! bottom row conductors
    do i=1,ncrow(2)    
    
      PUL%x(ncrow(1)+i)=-w(2)/2d0+(i-1)*p
      PUL%y(ncrow(1)+i)=-s/2d0
      PUL%r(ncrow(1)+i)=rw
      PUL%rd(ncrow(1)+i)=rw
      PUL%epsr(ncrow(1)+i)=1d0    ! no dielectric on conductors, they are in a homogeneous dielectric medium
    
    end do
        
    PUL%epsr_background = 1d0  ! permittivity of homogeneous dielectric medium surrounding conductors
    
! no ground plane
    PUL%ground_plane_present=.FALSE.
      
! add overshield i.e. the Dconnector shield
    PUL%overshield_present=.TRUE.
    PUL%overshield_shape=Dshape     
    PUL%overshield_x = 0d0          ! shield is centred at the origin in this calculation
    PUL%overshield_y = 0d0
    PUL%overshield_r = rw+o                      ! Dconnector curve radius (dl is defined in terms of this)
    PUL%overshield_w = w(1)+2d0*(rw+o)           ! Dconnector shield top width
    PUL%overshield_w2 = w(2)+2d0*(rw+o)          ! Dconnector shield bottom width
    PUL%overshield_h = s+2d0*(rw+o)              ! Dconnector shield height
    
    CALL PUL_LC_Laplace(PUL,cable%cable_name,cable%Y_fit_model_order,cable%Y_fit_freq_spec,domain) 
    
    cable%L_domain(domain)%mat(:,:)=PUL%L%mat(:,:)
    cable%C_domain(domain)%mat(:,:)=PUL%C%mat(:,:)
    
  else
  
    run_status='ERROR in Dconnector: this cable type must use the Laplace solver for the PUL paramter calculation'
    CALL write_program_status()
    STOP 1
  
  end if 
  
  CALL Z_Y_from_L_C(cable%L_domain(domain),cable%C_domain(domain),cable%Z_domain(domain),cable%Y_domain(domain))
  
  if (use_laplace) CALL deallocate_PUL_data(PUL)  ! deallocate the PUL data structure

! Set the domain decomposition matrices ! Theory_Manual_Eqn 6.19, 6.20

! The dimension of the domain transformation matrices is the number of conductors+1
  dim=nc+1

  cable%MI%dim=dim
  ALLOCATE(cable%MI%mat(dim,dim))
  cable%MI%mat(:,:)=0d0
  
  cable%MV%dim=dim
  ALLOCATE(cable%MV%mat(dim,dim))
  cable%MV%mat(:,:)=0d0
  
  do i=1,nc-1    ! loop over conductors except the local reference (shield) conductor 

    cable%MI%mat(i,i)=1d0
  
    cable%MV%mat(i,i)= 1d0
    cable%MV%mat(i,nc)=-1d0
  
  end do

! row for local reference conductor
  do i=1,nc
    cable%MI%mat(nc,i)=1d0
  end do

  cable%MV%mat(nc,nc)=1d0
  cable%MV%mat(nc,nc+1)=-1d0

! row for global reference 
  do i=1,nc+1
    cable%MI%mat(nc+1,i)=1d0
  end do

  cable%MV%mat(nc+1,nc+1)=1d0

! Set the local reference conductor numbering  
  ALLOCATE( cable%local_reference_conductor(nc) )
  do i=1,nc-1
    cable%local_reference_conductor(i)=nc            ! inner conductor, reference is the shield conductor
  end do  
  cable%local_reference_conductor(nc)=0              ! external domain conductor, reference not known

! Set the local domain information: include a reference conductor in the count
  ALLOCATE( cable%local_domain_n_conductors(1:cable%tot_n_domains) )
  cable%local_domain_n_conductors(1)=nc             ! internal domain 
  cable%local_domain_n_conductors(2)=2              ! external domain 
  
! Set the external domain conductor and dielectric information
   
  ALLOCATE( cable%external_model(cable%n_external_conductors) )
  CALL reset_external_conductor_model(cable%external_model(1))
  cable%external_model(1)%conductor_type=Dshape
  cable%external_model(1)%conductor_radius=o+rw
  cable%external_model(1)%conductor_width=w(1)+2d0*(o+rw)
  cable%external_model(1)%conductor_width2=w(2)+2d0*(o+rw)
  cable%external_model(1)%conductor_height=s+2d0*(o+rw)
  
  ALLOCATE( cable%conductor_label(1:cable%tot_n_conductors) )
  do i=1,cable%tot_n_conductors-1
    write(conductor_string,'(I2)')i
    cable%conductor_label(i)='Cable name: '//trim(cable%cable_name)//   &
    '. type: '//trim(cable%cable_type_string)//'. conductor '//conductor_string//' : D connector conductor'
  end do
  write(conductor_string,'(I2)')cable%tot_n_conductors
  cable%conductor_label(i)='Cable name: '//trim(cable%cable_name)//   &
    '. type: '//trim(cable%cable_type_string)//'. conductor '//conductor_string//' : D connector Shield'
  
END SUBROUTINE Dconnector_set_internal_domain_information
!
! NAME
!     Dconnector_plot
!
! AUTHORS
!     Chris Smartt
!
! DESCRIPTION
!     plot Dconnector cable 
!
! COMMENTS
!     the angle has an impact here...
!     The conductor geometry must be consistent with the documentation...
!
! HISTORY
!
!     started 14/4/2016 CJS 
!
!
SUBROUTINE Dconnector_plot(cable,x_offset,y_offset,theta,xmin,xmax,ymin,ymax)

USE type_specifications
USE general_module

IMPLICIT NONE

! variables passed to subroutine

  type(cable_specification_type),intent(IN)    :: cable
  
  real(dp),intent(IN) :: x_offset,y_offset,theta
  real(dp),intent(INOUT) ::  xmin,xmax,ymin,ymax

! local variables

! variables for cable parameters
  integer  :: nc
  real(dp) :: rw
  real(dp) :: p
  real(dp) :: s
  real(dp) :: o
  
! variables for cross section geometry

  integer  :: ncrow(2)  ! number of conductors in the two rows 
  real(dp) :: w(2)      ! width of the two rows of conductors

  real(dp) :: cx,cy,x,y  
  
  real(dp) :: wd,wd2,hd
  
  integer  :: i

! START

  nc=cable%tot_n_conductors 

  rw=cable%parameters(1)
  p=cable%parameters(2)
  s=cable%parameters(3)
  o=cable%parameters(4)

! plot inner conductors

! work out the number of conductors in the two rows    
  ncrow(1)=nc/2
  ncrow(2)=(nc-1)-ncrow(1)
    
! width of the two rows of conductors    
  w(1)=(ncrow(1)-1)*p
  w(2)=(ncrow(2)-1)*p

! top row conductors
  do i=1,ncrow(1)    
  
    cx=-w(1)/2d0+(i-1)*p
    cy=s/2d0
    
    x=x_offset+cx*cos(theta)-cy*sin(theta)
    y=y_offset+cx*sin(theta)+cy*cos(theta)

    CALL write_circle(x,y,rw,conductor_geometry_file_unit,xmin,xmax,ymin,ymax)
  
  end do

! bottom row conductors
  do i=1,ncrow(2)    
  
    cx=-w(2)/2d0+(i-1)*p
    cy=-s/2d0
    
    x=x_offset+cx*cos(theta)-cy*sin(theta)
    y=y_offset+cx*sin(theta)+cy*cos(theta)

    CALL write_circle(x,y,rw,conductor_geometry_file_unit,xmin,xmax,ymin,ymax)
  
  end do
  
! write the outer conductor    
  x=x_offset
  y=y_offset

  CALL write_Dshape(x,y,w(1)/2d0,w(2)/2d0,s/2d0,rw+o,theta,conductor_geometry_file_unit,xmin,xmax,ymin,ymax)
    
  RETURN
  
END SUBROUTINE Dconnector_plot