/****************************************************/
/* Gestion des composants specifiques aux microndes */
/*  Generation d'une self							*/
/****************************************************/

/* Fichier GEN_SELF.H */


/* Fonctions locales */

static void         Exit_Self( WinEDA_DrawPanel* Panel, wxDC* DC );
static EDGE_MODULE* gen_arc( EDGE_MODULE* PtSegm, int cX, int cY, int angle );
static void         ShowCadreSelf( WinEDA_DrawPanel* panel, wxDC* DC, bool erase );


/* structures locales */
class SELFPCB       // Definition d'une self constituee par une piste
{
public:
    int     forme;                      // Serpentin, spirale ..
    int     orient;                     // 0..3600
    int     valeur;                     // Valeur de la self
    wxPoint m_Start;
    wxPoint m_End;                      // Coord du point de depart et d'arrivee
    wxSize  m_Size;
    D_PAD*  pt_pad_start, * pt_pad_end; // Pointeurs sur les pads d'extremite
    int     lng;                        // Longueur de la piste constituant la self
    int     m_Width;                    // m_Size.xur de la piste
    int     nbrin;                      // Parametres de calcul: nombre de brins
    int     lbrin;                      // longueur du brin
    int     rayon;                      // Rayon des raccords entre brins
    int     delta;                      // distance aux pads
};

/* Variables locales */
static SELFPCB Mself;
static int     Self_On;
static int     Bl_X0, Bl_Y0, Bl_Xf, Bl_Yf; // Coord du cadre insrcivant la self


/*************************************************************************/
static void ShowCadreSelf( WinEDA_DrawPanel* panel, wxDC* DC, bool erase )
/*************************************************************************/
/* Routine d'affichage a l'ecran du cadre de la self */
{
    int deltaX, deltaY;

    /* Calcul de l'orientation et de la taille de la fenetre:
     *  - orient = vert ou Horiz ( dimension max)
     *      - Size.x = Size.y / 2
     */

    GRSetDrawMode( DC, GR_XOR );
    if( erase )/* effacement du cadre */
    {
        GRRect( &panel->m_ClipBox, DC, Bl_X0, Bl_Y0, Bl_Xf, Bl_Yf, YELLOW );
    }

    deltaX = (panel->GetScreen()->m_Curseur.x - Mself.m_Start.x) / 4;
    deltaY = (panel->GetScreen()->m_Curseur.y - Mself.m_Start.y) / 4;

    Mself.orient = 900;
    if( abs( deltaX ) > abs( deltaY ) )
        Mself.orient = 0;

    if( Mself.orient == 0 )
    {
        Bl_X0 = Mself.m_Start.x;
        Bl_Y0 = Mself.m_Start.y - deltaX;
        Bl_Xf = panel->GetScreen()->m_Curseur.x;
        Bl_Yf = Mself.m_Start.y + deltaX;
    }
    else
    {
        Bl_X0 = Mself.m_Start.x - deltaY;
        Bl_Y0 = Mself.m_Start.y;
        Bl_Xf = Mself.m_Start.x + deltaY;
        Bl_Yf = panel->GetScreen()->m_Curseur.y;
    }
    GRRect( &panel->m_ClipBox, DC, Bl_X0, Bl_Y0, Bl_Xf, Bl_Yf, YELLOW );
}


/*************************************************/
void Exit_Self( WinEDA_DrawPanel* Panel, wxDC* DC )
/*************************************************/
/* Routine de fermeture de l'application : ferme les commandes en cours */
{
    if( Self_On )
    {
        Self_On = 0;
        Panel->ManageCurseur( Panel, DC, 0 ); /* efface cadre */
        Panel->ManageCurseur = NULL;
        Panel->ForceCloseManageCurseur = NULL;
    }
}


/*******************************************/
void WinEDA_PcbFrame::Begin_Self( wxDC* DC )
/*******************************************/

/*
 *  Routine d'initialisation d'un trace de self
 */
{
    if( Self_On )
    {
        Genere_Self( DC );
        return;
    }

    Mself.m_Start = GetScreen()->m_Curseur;

    Self_On = 1;

    /* Mise a jour de l'origine des coord relatives */
    GetScreen()->m_O_Curseur = GetScreen()->m_Curseur;
    Affiche_Status_Box();

    Bl_X0 = Mself.m_Start.x; Bl_Y0 = Mself.m_Start.y;
    Bl_Xf = Bl_X0; Bl_Yf = Bl_Y0;

    DrawPanel->ManageCurseur = ShowCadreSelf;
    DrawPanel->ForceCloseManageCurseur = Exit_Self;
    DrawPanel->ManageCurseur( DrawPanel, DC, 0 ); /* Affiche cadre */
}


/**********************************************/
MODULE* WinEDA_PcbFrame::Genere_Self( wxDC* DC )
/**********************************************/

/* Genere une self en forme de serpentin
 *  - longueur Mself.lng
 *  - Extremites Mself.m_Start et Mself.m_End
 *  - Contrainte: m_Start.x = m_End.x ( self verticale )
 *          ou	  m_Start.y = m_End.y ( self horizontale )
 *
 *  On doit determiner:
 *      Mself.nbrin = nombre de segments perpendiculaires a la direction
 *              ( le serpention aura nbrin + 1 demicercles + 2 1/4 de cercle)
 *      Mself.lbrin = longueur d'un brin
 *      Mself.rayon = rayon des parties arrondies du serpentin
 *      Mself.delta = segments raccord entre extremites et le serpention lui meme
 *
 *  Les equations sont
 *      Mself.m_Size.x = 2*Mself.rayon + Mself.lbrin
 *      Mself.m_Size.y  = 2*Mself.delta + 2*Mself.nbrin*Mself.rayon
 *      Mself.lng	  = 2*Mself.delta				// Raccords au serpentin
 + (Mself.nbrin-2) * Mself.lbrin //longueur des brins sauf 1er et dernier
 + (Mself.nbrin+1) * ( PI * Mself.rayon) // longueur des arrondis
 + Mself.lbrin/2 - Melf.rayon*2) // longueur du 1er et dernier brin
 *
 *  Les contraintes sont:
 *      nbrin >= 2
 *      Mself.rayon < Mself.m_Size.x
 *      Mself.m_Size.y = Mself.rayon*4 + 2*Mself.raccord
 *      Mself.lbrin > Mself.rayon *2
 *
 *  Le calcul est conduit de la facon suivante:
 *  Initialement:
 *      nbrin = 2
 *      rayon = 4 * m_Size.x (valeur fixe arbitraire)
 *  puis:
 *      on augmente le nombre de brins jusqu'a la longueur desiree
 *      ( le rayon est diminue si necessaire )
 *
 */
{
    EDGE_MODULE* PtSegm, * LastSegm, * FirstSegm, * newedge;
    MODULE*      Module;
    D_PAD*       PtPad;
    int          ii, ll, lextbrin;
    float        fcoeff;
    bool         abort = FALSE;
    wxString     msg;

    DrawPanel->ManageCurseur( DrawPanel, DC, FALSE ); /* efface cadre */
    DrawPanel->ManageCurseur = NULL;
    DrawPanel->ForceCloseManageCurseur = NULL;

    if( Self_On == 0 )
    {
        DisplayError( this, wxT( "Starting point not init.." ) ); return NULL;
    }

    Self_On = 0;

    Mself.m_End = GetScreen()->m_Curseur;

    /* Agencement des parametres pour simplifier le calcul : */
    /* le point de depart doit avoir la coord depart < celle du point de fin */

    if( Mself.orient == 0 )    // Self horizontale
    {
        Mself.m_End.y = Mself.m_Start.y;
        if( Mself.m_Start.x > Mself.m_End.x )
            EXCHG( Mself.m_Start.x, Mself.m_End.x );
        Mself.m_Size.y = Mself.m_End.x - Mself.m_Start.x;
        Mself.lng = Mself.m_Size.y;
    }
    else                    // Self verticale
    {
        Mself.m_End.x = Mself.m_Start.x;
        if( Mself.m_Start.y > Mself.m_End.y )
            EXCHG( Mself.m_Start.y, Mself.m_End.y );
        Mself.m_Size.y = Mself.m_End.y - Mself.m_Start.y;
        Mself.lng = Mself.m_Size.y;
    }

    /* Entree de la vraie longueur desiree */
    if( !g_UnitMetric )
    {
        fcoeff = 10000.0;
        msg.Printf( wxT( "%1.4f" ), Mself.lng / fcoeff );
        abort = Get_Message( _( "Length(inch):" ), msg, this );
    }
    else
    {
        fcoeff = 10000.0 / 25.4;
        msg.Printf( wxT( "%2.3f" ), Mself.lng / fcoeff );
        abort = Get_Message( _( "Length(mm):" ), msg, this );
    }
    if( abort )
        return NULL;

    double fval;
    if( !msg.ToDouble( &fval ) )
    {
        DisplayError( this, _( "Incorrect number, abort" ) );
        return NULL;
    }
    Mself.lng = (int) round( fval * fcoeff );

    /* Controle des valeurs ( ii = valeur minimale de la longueur */
    if( Mself.lng < Mself.m_Size.y )
    {
        DisplayError( this, _( "Requested length < minimum length" ) );
        return NULL;
    }

    /* Generation du composant: calcul des elements de la self */
    Mself.m_Width  = g_DesignSettings.m_CurrentTrackWidth;
    Mself.m_Size.x = Mself.m_Size.y / 2;

    // Choix d'une Valeur de depart raisonnable pour le rayon des arcs de cercle
    Mself.rayon = MIN( Mself.m_Width * 5, Mself.m_Size.x / 4 );
    /* Calcul des parametres */

    for( Mself.nbrin = 2; ; Mself.nbrin++ )
    {
        Mself.delta = ( Mself.m_Size.y - ( Mself.rayon * 2 * Mself.nbrin ) ) / 2;
        if( Mself.delta < Mself.m_Size.y / 10 ) // C.a.d. si m_Size.yeur self > m_Size.yeur specifiee
        {                                       // Reduction du rayon des arrondis
            Mself.delta = Mself.m_Size.y / 10;
            Mself.rayon = (Mself.m_Size.y - 2 * Mself.delta) / ( 2 * Mself.nbrin);
            if( Mself.rayon < Mself.m_Width )
            { // Rayon vraiment trop petit...
                Affiche_Message( _( "Unable to create line: Requested length is too big" ) );
                return NULL;
            }
        }
        Mself.lbrin = Mself.m_Size.x - (Mself.rayon * 2);
        lextbrin    = (Mself.lbrin / 2) - Mself.rayon;
        ll  = 2 * lextbrin;                     // Longueur du 1er et dernier brin
        ll += 2 * Mself.delta;                  // Longueur des raccord au serpentin
        ll += Mself.nbrin * (Mself.lbrin - 2);  // longueur des autres brins
        ll += ( (Mself.nbrin + 1) * 314 * Mself.rayon ) / 100;

        msg.Printf( _( "Segm count = %d, Lenght = " ), Mself.nbrin );
        wxString stlen;
        valeur_param( ll, stlen ); msg += stlen;
        Affiche_Message( msg );
        if( ll >= Mself.lng )
            break;
    }

    /* Generation du composant : le calcul est fait self Verticale */
    if( Create_1_Module( DC, wxEmptyString ) == NULL )
        return NULL;

    Module = m_Pcb->m_Modules;
    Module->m_LibRef    = wxT( "MuSelf" );
    Module->m_Attributs = MOD_VIRTUAL | MOD_CMS;
    Module->m_Flags = 0;

    Module->Draw( DrawPanel, DC, GR_XOR );

    /* Generation des elements speciaux: drawsegments */
    LastSegm = (EDGE_MODULE*) Module->m_Drawings;
    if( LastSegm )
        while( LastSegm->Pnext )
            LastSegm = (EDGE_MODULE*) LastSegm->Pnext;

    FirstSegm = PtSegm = new EDGE_MODULE( Module );
    if( LastSegm )
    {
        LastSegm->Pnext = PtSegm;
        PtSegm->Pback   = LastSegm;
    }
    else
    {
        Module->m_Drawings = PtSegm; PtSegm->Pback = Module;
    }
    PtSegm->m_Start = Mself.m_Start;
    PtSegm->m_End.x = Mself.m_Start.x;
    PtSegm->m_End.y = PtSegm->m_Start.y + Mself.delta;
    PtSegm->m_Width = Mself.m_Width;
    PtSegm->SetLayer( Module->GetLayer() );
    PtSegm->m_Shape = S_SEGMENT;

    newedge = new EDGE_MODULE( Module );
    newedge->Copy( PtSegm );
    newedge->AddToChain( PtSegm );
    PtSegm = newedge;
    PtSegm->m_Start = PtSegm->m_End;
    PtSegm = gen_arc( PtSegm, PtSegm->m_End.x - Mself.rayon, PtSegm->m_End.y, -900 );

    if( lextbrin )
    {
        newedge = new EDGE_MODULE( Module );
        newedge->Copy( PtSegm );
        newedge->AddToChain( PtSegm );
        PtSegm = newedge;
        PtSegm->m_Start  = PtSegm->m_End;
        PtSegm->m_End.x -= lextbrin;
    }

    /* Trace du serpentin */
    for( ii = 1; ii < Mself.nbrin; ii++ )
    {
        int arc_angle;
        newedge = new EDGE_MODULE( Module );
        newedge->Copy( PtSegm );
        newedge->AddToChain( PtSegm );
        PtSegm = newedge;
        PtSegm->m_Start = PtSegm->m_End;
        if( ii & 1 ) /* brin d'ordre impair : cercles de sens > 0 */
            arc_angle = 1800;
        else
            arc_angle = -1800;

        PtSegm = gen_arc( PtSegm, PtSegm->m_End.x,
                          PtSegm->m_End.y + Mself.rayon, arc_angle );

        if( ii < Mself.nbrin - 1 )
        {
            newedge = new EDGE_MODULE( Module );
            newedge->Copy( PtSegm );
            newedge->AddToChain( PtSegm );
            PtSegm = newedge;
            PtSegm->m_Start = PtSegm->m_End;
            if( ii & 1 )
                PtSegm->m_End.x += Mself.lbrin;
            else
                PtSegm->m_End.x -= Mself.lbrin;
        }
    }

    /* Trace du point final */

    if( ii & 1 )     /* brin final de sens > 0 */
    {
        if( lextbrin )
        {
            newedge = new EDGE_MODULE( Module );
            newedge->Copy( PtSegm );
            newedge->AddToChain( PtSegm );
            PtSegm = newedge;
            PtSegm->m_Start  = PtSegm->m_End;
            PtSegm->m_End.x -= lextbrin;
        }

        newedge = new EDGE_MODULE( Module );
        newedge->Copy( PtSegm );
        newedge->AddToChain( PtSegm );
        PtSegm = newedge;
        PtSegm->m_Start.x = PtSegm->m_End.x; PtSegm->m_Start.y = PtSegm->m_End.y;
        PtSegm = gen_arc( PtSegm, PtSegm->m_End.x, PtSegm->m_End.y + Mself.rayon, 900 );
    }
    else
    {
        if( lextbrin )
        {
            newedge = new EDGE_MODULE( Module );
            newedge->Copy( PtSegm );
            newedge->AddToChain( PtSegm );
            PtSegm = newedge;
            PtSegm->m_Start  = PtSegm->m_End;
            PtSegm->m_End.x += lextbrin;
        }
        newedge = new EDGE_MODULE( Module );
        newedge->Copy( PtSegm );
        newedge->AddToChain( PtSegm );
        PtSegm = newedge;
        PtSegm->m_Start = PtSegm->m_End;
        PtSegm = gen_arc( PtSegm, PtSegm->m_End.x, PtSegm->m_End.y + Mself.rayon, -900 );
    }

    newedge = new EDGE_MODULE( Module );
    newedge->Copy( PtSegm );
    newedge->AddToChain( PtSegm );
    PtSegm = newedge;
    PtSegm->m_Start = PtSegm->m_End;
    PtSegm->m_End   = Mself.m_End;
    PtSegm->Pnext   = NULL;

    /* Rotation de la self si le trace doit etre horizontal : */
    LastSegm = PtSegm;
    if( Mself.orient == 0 )
    {
        for( PtSegm = FirstSegm; PtSegm != NULL; PtSegm = (EDGE_MODULE*) PtSegm->Pnext )
        {
            RotatePoint( &PtSegm->m_Start.x, &PtSegm->m_Start.y,
                         FirstSegm->m_Start.x, FirstSegm->m_Start.y, 900 );
            if( PtSegm != LastSegm )
                RotatePoint( &PtSegm->m_End.x, &PtSegm->m_End.y,
                             FirstSegm->m_Start.x, FirstSegm->m_Start.y, 900 );
        }
    }

    /* Modif  position ancre  */
    Module->m_Pos.x = LastSegm->m_End.x; Module->m_Pos.y = LastSegm->m_End.y;

    /* Placement des 2 pads sur extremite */
    PtPad = new D_PAD( Module );

    Module->m_Pads = PtPad; PtPad->Pback = Module;
    PtPad->SetPadName( wxT( "1" ) );
    PtPad->m_Pos.x  = LastSegm->m_End.x; PtPad->m_Pos.y = LastSegm->m_End.y;
    PtPad->m_Pos0.x = PtPad->m_Pos.x - Module->m_Pos.x;
    PtPad->m_Pos0.y = PtPad->m_Pos.y - Module->m_Pos.y;
    PtPad->m_Size.x = PtPad->m_Size.y = LastSegm->m_Width;
    PtPad->m_Masque_Layer = g_TabOneLayerMask[LastSegm->GetLayer()];
    PtPad->m_Attribut = PAD_SMD;
    PtPad->m_PadShape = PAD_CIRCLE;
    PtPad->m_Rayon    = PtPad->m_Size.x / 2;

    D_PAD* newpad = new D_PAD( Module );
    newpad->Copy( PtPad );
    newpad->AddToChain( PtPad );
    PtPad = newpad;
    PtPad->SetPadName( wxT( "2" ) );
    PtPad->m_Pos.x  = FirstSegm->m_Start.x; PtPad->m_Pos.y = FirstSegm->m_Start.y;
    PtPad->m_Pos0.x = PtPad->m_Pos.x - Module->m_Pos.x;
    PtPad->m_Pos0.y = PtPad->m_Pos.y - Module->m_Pos.y;

    /* Modif des positions textes */
    Module->Display_Infos( this );
    Module->m_Value->m_Pos.x = Module->m_Reference->m_Pos.x = ( FirstSegm->m_Start.x +
                                                                LastSegm->m_End.x ) / 2;
    Module->m_Value->m_Pos.y = Module->m_Reference->m_Pos.y = ( FirstSegm->m_Start.y +
                                                                LastSegm->m_End.y ) / 2;

    Module->m_Reference->m_Pos.y -= Module->m_Reference->m_Size.y;
    Module->m_Value->m_Pos.y += Module->m_Value->m_Size.y;

    Module->m_Reference->m_Pos0.x = Module->m_Reference->m_Pos.x - Module->m_Pos.x;
    Module->m_Reference->m_Pos0.y = Module->m_Reference->m_Pos.y - Module->m_Pos.y;
    Module->m_Value->m_Pos0.x = Module->m_Value->m_Pos.x - Module->m_Pos.x;
    Module->m_Value->m_Pos0.y = Module->m_Value->m_Pos.y - Module->m_Pos.y;

    /* Init des Coord locales des segments */
    for( PtSegm = FirstSegm; PtSegm != NULL; PtSegm = (EDGE_MODULE*) PtSegm->Pnext )
    {
        PtSegm->m_Start0.x = PtSegm->m_Start.x - Module->m_Pos.x;
        PtSegm->m_Start0.y = PtSegm->m_Start.y - Module->m_Pos.y;
        PtSegm->m_End0.x   = PtSegm->m_End.x - Module->m_Pos.x;
        PtSegm->m_End0.y   = PtSegm->m_End.y - Module->m_Pos.y;
    }

    Module->Set_Rectangle_Encadrement();

    Module->Draw( DrawPanel, DC, GR_OR );

    return Module;
}


/**************************************************************************/
static EDGE_MODULE* gen_arc( EDGE_MODULE* PtSegm, int cX, int cY, int angle )
/**************************************************************************/

/* Genere un arc de EDGE_MODULE :
 *  de centre cX,cY
 *  d'angle "angle"
 *  de point de depart donne dans la structure pointee par PtSegm, qui doit
 *  entre a jour (type,net..)
 *  Retourne un pointeur sur la derniere structure EDGE_MODULE generee
 */
{
    int          ii, nb_seg;
    float        alpha, beta, fsin, fcos;
    int          x0, xr0, y0, yr0;
    EDGE_MODULE* newedge;

    angle = -angle;
    y0    = PtSegm->m_Start.x - cX; x0 = PtSegm->m_Start.y - cY;

    nb_seg = ( abs( angle ) ) / 225; if( nb_seg == 0 )
        nb_seg = 1;
    alpha  = ( (float) angle * 3.14159 / 1800 ) / nb_seg;

    for( ii = 1; ii <= nb_seg; ii++ )
    {
        if( ii > 1 )
        {
            newedge = new EDGE_MODULE( (MODULE*) NULL );
            newedge->Copy( PtSegm );
            newedge->m_Parent = PtSegm->m_Parent;
            newedge->AddToChain( PtSegm );
            PtSegm = newedge;
            PtSegm->m_Start.x = PtSegm->m_End.x; PtSegm->m_Start.y = PtSegm->m_End.y;
        }

        beta = (alpha * ii);
        fcos = cos( beta ); fsin = sin( beta );

        xr0 = (int) (x0 * fcos + y0 * fsin);
        yr0 = (int) (y0 * fcos - x0 * fsin);
        PtSegm->m_End.x = cX + yr0; PtSegm->m_End.y = cY + xr0;
    }

    return PtSegm;
}