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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2014 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>

#include "container.h"
#include "../common/context.h"
#include "../common/object.h"

#define UI_GRID_MAX_COLUMNS 512

static UiBool ui_lb2bool(UiLayoutBool b) {
    return b == UI_LAYOUT_TRUE ? TRUE : FALSE;
}

static UiLayoutBool ui_bool2lb(UiBool b) {
    return b ? UI_LAYOUT_TRUE : UI_LAYOUT_FALSE;
}


UiContainer* ui_frame_container(UiObject *obj, Widget frame) {
    UiContainer *ct = ucx_mempool_calloc(
            obj->ctx->mempool,
            1,
            sizeof(UiContainer));
    ct->widget = frame;
    ct->prepare = ui_frame_container_prepare;
    ct->add = ui_frame_container_add;
    return ct;
}

Widget ui_frame_container_prepare(UiContainer *ct, Arg *args, int *n, UiBool fill) {
    return ct->widget;
}

void ui_frame_container_add(UiContainer *ct, Widget widget) {
    ui_reset_layout(ct->layout);
}


UiContainer* ui_box_container(UiObject *obj, Widget box, UiBoxOrientation orientation) {
    UiBoxContainer *ct = ucx_mempool_calloc(
            obj->ctx->mempool,
            1,
            sizeof(UiBoxContainer));
    ct->container.widget = box;
    ct->container.prepare = ui_box_container_prepare;
    ct->container.add = ui_box_container_add;
    ct->orientation = orientation;
    return (UiContainer*)ct;
}

Widget ui_box_container_prepare(UiContainer *ct, Arg *args, int *n, UiBool fill) {
    UiBoxContainer *bc = (UiBoxContainer*)ct;
    if(ct->layout.fill != UI_LAYOUT_UNDEFINED) {
        fill = ui_lb2bool(ct->layout.fill);
    }
    
    if(bc->has_fill && fill) {
        fprintf(stderr, "UiError: container has 2 filled widgets");
        fill = FALSE;
    }
    if(fill) {
        bc->has_fill = TRUE;
    }
    
    int a = *n;
    // determine fixed and dynamic attachments
    void *f1;
    void *f2;
    void *d1;
    void *d2;
    void *w1;
    void *w2;
    if(bc->orientation == UI_BOX_VERTICAL) {
        f1 = XmNleftAttachment;
        f2 = XmNrightAttachment;
        d1 = XmNtopAttachment;
        d2 = XmNbottomAttachment;
        w1 = XmNtopWidget;
        w2 = XmNbottomWidget;
        
    } else {
        f1 = XmNtopAttachment;
        f2 = XmNbottomAttachment;
        d1 = XmNleftAttachment;
        d2 = XmNrightAttachment;
        w1 = XmNleftWidget;
        w2 = XmNrightWidget;
    }
    XtSetArg(args[a], f1, XmATTACH_FORM); a++;
    XtSetArg(args[a], f2, XmATTACH_FORM); a++;

    if(fill) {
        XtSetArg(args[a], d2, XmATTACH_FORM); a++;
    }
    if(bc->prev_widget) {
        XtSetArg(args[a], d1, XmATTACH_WIDGET); a++;
        XtSetArg(args[a], w1, bc->prev_widget); a++;
    } else {
        XtSetArg(args[a], d1, XmATTACH_FORM); a++;
    }
    
    *n = a;
    return ct->widget;
}

void ui_box_container_add(UiContainer *ct, Widget widget) {
    UiBoxContainer *bc = (UiBoxContainer*)ct;
    // determine dynamic attachments
    void *d1;
    void *d2;
    void *w1;
    void *w2;
    if(bc->orientation == UI_BOX_VERTICAL) {
        d1 = XmNtopAttachment;
        d2 = XmNbottomAttachment;
        w1 = XmNtopWidget;
        w2 = XmNbottomWidget;
        
    } else {
        d1 = XmNleftAttachment;
        d2 = XmNrightAttachment;
        w1 = XmNleftWidget;
        w2 = XmNrightWidget;
    }
    
    if(bc->prev_widget) {
        int v = 0;
        XtVaGetValues(bc->prev_widget, d2, &v, 0);
        if(v == XmATTACH_FORM) {
            XtVaSetValues(
                    bc->prev_widget,
                    d2,
                    XmATTACH_WIDGET,
                    w2,
                    widget,
                    0);
            XtVaSetValues(
                    widget,
                    d1,
                    XmATTACH_NONE,
                    d2,
                    XmATTACH_FORM,
                    0);
        }
    }
    bc->prev_widget = widget;
    
    ui_reset_layout(ct->layout);
}

UiContainer* ui_grid_container(UiObject *obj, Widget form) {
    UiGridContainer *ct = ucx_mempool_calloc(
            obj->ctx->mempool,
            1,
            sizeof(UiGridContainer));
    ct->container.widget = form;
    ct->container.prepare = ui_grid_container_prepare;
    ct->container.add = ui_grid_container_add;
    return (UiContainer*)ct;
}

void ui_grid_newline(UiGridContainer *grid) {
    if(grid->current) {
        grid->current = NULL;
    }
    grid->container.layout.newline = FALSE;
}

Widget ui_grid_container_prepare(UiContainer *ct, Arg *args, int *n, UiBool fill) {
    UiGridContainer *grid = (UiGridContainer*)ct;
    if(ct->layout.newline) {
        ui_grid_newline(grid);
    }
    return ct->widget;
}

void ui_grid_container_add(UiContainer *ct, Widget widget) {
    UiGridContainer *grid = (UiGridContainer*)ct;
    
    if(grid->current) {
        grid->current = ucx_list_append(grid->current, widget);
    } else {
        grid->current = ucx_list_append(grid->current, widget);
        grid->lines = ucx_list_append(grid->lines, grid->current);
    }
    
    ui_reset_layout(ct->layout);
}

static void ui_grid_resize(Widget widget, XtPointer udata, XtPointer cdata) {
    UiGridContainer *grid = udata;
    
    UcxList *rowdim = NULL;
    int coldim[UI_GRID_MAX_COLUMNS];
    memset(coldim, 0, UI_GRID_MAX_COLUMNS*sizeof(int));
    int numcol = 0;
    
    // get the minimum size of the columns and rows
    int sumw = 0;
    int sumh = 0;
    UCX_FOREACH(row, grid->lines) {
        int rheight = 0;
        int i=0;
        int sum_width = 0;
        UCX_FOREACH(elm, row->data) {
            Widget w = elm->data;
            int widget_width = 0;
            int widget_height = 0;
            XtVaGetValues(
                    w,
                    XmNwidth,
                    &widget_width,
                    XmNheight,
                    &widget_height, 
                    0);
            
            // get the maximum height in this row
            if(widget_height > rheight) {
                rheight = widget_height;
            }
            
            // get the maximum width in this column
            if(widget_width > coldim[i]) {
                coldim[i] = widget_width;
            }
            sum_width += widget_width;
            if(sum_width > sumw) {
                sumw = sum_width;
            }
            
            i++;
            if(i > numcol) {
                numcol = i;
            }
        }
        rowdim = ucx_list_append(rowdim, (void*)(intptr_t)rheight);
        sumh += rheight;
    }
    
    // check container size
    int gwidth = 0;
    int gheight = 0;
    XtVaGetValues(widget, XmNwidth, &gwidth, XmNheight, &gheight, NULL);
    if(gwidth < sumw || gheight < sumh) {
        XtVaSetValues(widget, XmNwidth, sumw, XmNheight, sumh, NULL);
        ucx_list_free(rowdim);
        return;
    }
    
    
    // adjust the positions of all children
    int y = 0;
    UCX_FOREACH(row, grid->lines) {
        int x = 0;       
        int i=0;
        UCX_FOREACH(elm, row->data) {
            Widget w = elm->data;
            XtVaSetValues(
                    w,
                    XmNx, x,
                    XmNy, y,
                    XmNwidth, coldim[i],
                    XmNheight, rowdim->data,
                    NULL);
            
            x += coldim[i];
            i++;
        }
        y += (intptr_t)rowdim->data;
        rowdim = rowdim->next;
    }
    
    ucx_list_free(rowdim);
}

UIWIDGET ui_box(UiObject *obj, UiBoxOrientation orientation) {
    UiContainer *ct = uic_get_current_container(obj);
    
    Arg args[16];
    int n = 0;
    Widget parent = ct->prepare(ct, args, &n, TRUE);
    Widget form = XmCreateForm(parent, "vbox", args, n);
    ct->add(ct, form);
    XtManageChild(form);
    
    UiObject *newobj = uic_object_new(obj, form);
    newobj->container = ui_box_container(obj, form, orientation);
    uic_obj_add(obj, newobj);
    
    return form;
}

UIWIDGET ui_vbox(UiObject *obj) {
    return ui_box(obj, UI_BOX_VERTICAL);
}

UIWIDGET ui_hbox(UiObject *obj) {
    return ui_box(obj, UI_BOX_HORIZONTAL);
}

UIWIDGET ui_grid(UiObject *obj) {
    UiContainer *ct = uic_get_current_container(obj);
    
    Arg args[16];
    int n = 0;
    Widget parent = ct->prepare(ct, args, &n, TRUE);
    Widget grid = XmCreateDrawingArea(parent, "grid", args, n);
    ct->add(ct, grid);
    XtManageChild(grid);
    
    UiObject *newobj = uic_object_new(obj, grid);
    newobj->container = ui_grid_container(obj, grid);
    uic_obj_add(obj, newobj);
    
    XtAddCallback (grid, XmNresizeCallback , ui_grid_resize, newobj->container);
    
    return grid;
}

UIWIDGET ui_sidebar(UiObject *obj) {
    UiContainer *ct = uic_get_current_container(obj);
    
    Arg args[16];
    int n = 0;
    
    XtSetArg(args[n], XmNorientation, XmHORIZONTAL);
    n++;
    
    Widget parent = ct->prepare(ct, args, &n, TRUE);
    Widget pane = XmCreatePanedWindow(parent, "pane", args, n);
    ct->add(ct, pane);
    XtManageChild(pane);
    
    // add sidebar widget
    Widget sidebar = XmCreateForm(pane, "sidebar", args, 0);
    XtManageChild(sidebar);
    
    UiObject *left = uic_object_new(obj, sidebar);
    left->container = ui_box_container(left, sidebar, UI_BOX_VERTICAL);
    
    // add content widget
    XtSetArg (args[0], XmNpaneMaximum, 8000);
    Widget content = XmCreateForm(pane, "content_area", args, 1);
    XtManageChild(content);
    
    UiObject *right = uic_object_new(obj, content);
    right->container = ui_box_container(right, content, UI_BOX_VERTICAL);
    
    uic_obj_add(obj, right);
    uic_obj_add(obj, left);
    
    return sidebar;
}

UiTabbedPane* ui_tabbed_document_view(UiObject *obj) {
    int n = 0;
    Arg args[16];
    
    UiContainer *ct = uic_get_current_container(obj);
    Widget parent = ct->prepare(ct, args, &n, TRUE);
    
    Widget tabview = XmCreateForm(parent, "tabview_form", args, n);
    XtManageChild(tabview);
    
    XtSetArg(args[0], XmNorientation, XmHORIZONTAL);
    XtSetArg(args[1], XmNpacking, XmPACK_TIGHT);
    XtSetArg(args[2], XmNspacing, 1);
    XtSetArg(args[3], XmNleftAttachment, XmATTACH_FORM);
    XtSetArg(args[4], XmNrightAttachment, XmATTACH_FORM);
    XtSetArg(args[5], XmNtopAttachment, XmATTACH_FORM);
    Widget tabbar = XmCreateForm(tabview, "toolbar", args, 6);
    XtManageChild(tabbar);
    
    XtSetArg(args[0], XmNleftAttachment, XmATTACH_FORM);
    XtSetArg(args[1], XmNrightAttachment, XmATTACH_FORM);
    XtSetArg(args[2], XmNtopAttachment, XmATTACH_WIDGET);
    XtSetArg(args[3], XmNtopWidget, tabbar);
    XtSetArg(args[4], XmNbottomAttachment, XmATTACH_FORM);
    XtSetArg(args[5], XmNshadowThickness, 0);
    Widget tabct = XmCreateForm(tabview, "tabview", args, 6);
    XtManageChild(tabct);
    
    MotifTabbedPane *tabbedpane = ui_malloc(obj->ctx, sizeof(MotifTabbedPane));
    tabbedpane->view.ctx = uic_current_obj(obj)->ctx;
    tabbedpane->view.widget = tabct;
    tabbedpane->view.document = NULL;
    tabbedpane->tabbar = tabbar;
    tabbedpane->tabs = NULL;
    tabbedpane->current = NULL;
    
    return &tabbedpane->view;
}

UiObject* ui_document_tab(UiTabbedPane *view) {
    MotifTabbedPane *v = (MotifTabbedPane*)view;
    int n = 0;
    Arg args[16];
    
    // hide the current tab content
    if(v->current) {
        XtUnmanageChild(v->current->content->widget);
    }
    
    UiTab *tab = ui_malloc(view->ctx, sizeof(UiTab));
    
    // create the new tab content
    XtSetArg(args[0], XmNshadowThickness, 0);
    XtSetArg(args[1], XmNleftAttachment, XmATTACH_FORM);
    XtSetArg(args[2], XmNrightAttachment, XmATTACH_FORM);
    XtSetArg(args[3], XmNtopAttachment, XmATTACH_FORM);
    XtSetArg(args[4], XmNbottomAttachment, XmATTACH_FORM);
    XtSetArg(args[5], XmNuserData, tab);
    Widget frame = XmCreateFrame(view->widget, "tab", args, 6);
    XtManageChild(frame);
    
    UiObject *content = ui_malloc(view->ctx, sizeof(UiObject));
    content->widget = NULL; // initialization for uic_context()
    content->ctx = uic_context(content, view->ctx->mempool);
    content->ctx->parent = view->ctx;
    content->ctx->set_document = ui_tab_set_document;
    content->ctx->detach_document = ui_tab_detach_document;
    content->widget = frame;
    content->window = view->ctx->obj->window;
    content->container = ui_frame_container(content, frame);
    content->next = NULL;
    
    // add tab button
    v->tabs = ucx_list_append_a(view->ctx->mempool->allocator, v->tabs, tab);
    
    XmString label = XmStringCreateLocalized("tab");
    XtSetArg(args[0], XmNlabelString, label);
    XtSetArg(args[1], XmNshadowThickness, 1);
    XtSetArg(args[2], XmNtraversalOn, FALSE);
    XtSetArg(args[3], XmNtopAttachment, XmATTACH_FORM);
    XtSetArg(args[4], XmNbottomAttachment, XmATTACH_FORM);
    XtSetArg(args[5], XmNhighlightThickness, 0);
    XtSetArg(args[6], XmNindicatorOn, XmINDICATOR_NONE);
    XtSetArg(args[7], XmNfillOnSelect, TRUE);
    XtSetArg(args[8], XmNtopShadowColor, 1);
    
    Widget button = XmCreateToggleButton(v->tabbar, "tab_button", args, 8);
    tab->tabbedpane = v;
    tab->content = content;
    tab->tab_button = button;
    
    // layout
    int is_first = 1;
    size_t count = ucx_list_size(v->tabs);
    int part = 100 / count;
    int pos = 0;
    int i = 0;
    UCX_FOREACH(elm, v->tabs) {
        UiTab *tt = elm->data;
        if(is_first) {
            XtVaSetValues(
                    tt->tab_button,
                    XmNleftAttachment,
                    XmATTACH_FORM,
                    XmNrightAttachment,
                    XmATTACH_POSITION,
                    XmNrightPosition,
                    pos + part,
                    XmNset,
                    FALSE,
                    NULL);
            is_first = FALSE;
        } else if(i < count - 1) {
            XtVaSetValues(
                    tt->tab_button,
                    XmNleftAttachment,
                    XmATTACH_POSITION,
                    XmNleftPosition,
                    pos,
                    XmNrightAttachment,
                    XmATTACH_POSITION,
                    XmNrightPosition,
                    pos + part,
                    XmNset,
                    FALSE,
                    NULL);
        } else {
            XtVaSetValues(
                    tt->tab_button,
                    XmNleftAttachment,
                    XmATTACH_POSITION,
                    XmNleftPosition,
                    pos,
                    XmNrightAttachment,
                    XmATTACH_FORM,
                    XmNset,
                    FALSE,
                    NULL);
        }
        pos += part;
        i++;
    }
    
    XtManageChild(button);
    XtVaSetValues(button, XmNset, TRUE, NULL);
    XtAddCallback(
        button,
        XmNvalueChangedCallback,
        (XtCallbackProc)ui_tab_button_callback,
        tab);
    
    v->current = tab;
    ui_change_tab(v, tab);
    
    return content;
}

void ui_tab_button_callback(Widget widget, UiTab *tab, XtPointer d) {  
    MotifTabbedPane *t = tab->tabbedpane;
    if(t->current) {
        XtUnmanageChild(t->current->content->widget);
        XtVaSetValues(t->current->tab_button, XmNset, 0, NULL);
    }
    XtManageChild(tab->content->widget);
    
    t->current = tab;
    ui_change_tab(t, tab);
}

void ui_change_tab(MotifTabbedPane *pane, UiTab *tab) {
    UiContext *ctx = tab->content->ctx;
    ctx->parent->set_document(ctx->parent, ctx->document);
}

void ui_tab_set_document(UiContext *ctx, void *document) {
    if(ctx->parent->document) {
        //ctx->parent->detach_document(ctx->parent, ctx->parent->document);
    }
    uic_context_set_document(ctx, document);
    //uic_context_set_document(ctx->parent, document);
    //ctx->parent->document = document;
    
    UiTab *tab = NULL;
    XtVaGetValues(
            ctx->obj->widget,
            XmNuserData,
            &tab,
            NULL);
    if(tab) {
        if(tab->tabbedpane->current == tab) {
            ctx->parent->set_document(ctx->parent, ctx->document);
        }
    } else {
        fprintf(stderr, "UiError: ui_bar_set_document: Cannot set document");
    }
}

void ui_tab_detach_document(UiContext *ctx, void *document) {
    uic_context_detach_document(ctx->parent, document);
}


/*
 * -------------------- Layout Functions --------------------
 * 
 * functions for setting layout attributes for the current container
 *
 */

void ui_layout_fill(UiObject *obj, UiBool fill) {
    UiContainer *ct = uic_get_current_container(obj);
    ct->layout.fill = ui_bool2lb(fill);
}

void ui_newline(UiObject *obj) {
    UiContainer *ct = uic_get_current_container(obj);
    ct->layout.newline = TRUE;
}