/**
 * $Id$
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program 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 2
 * of the License, or (at your option) any later version. 
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <stdlib.h>
#include <math.h>

#include "MEM_guardedalloc.h"

#include "DNA_listBase.h"
#include "DNA_action_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_windowmanager_types.h"

#include "BLI_blenlib.h"

#include "BKE_context.h"
#include "BKE_sound.h"
#include "BKE_utildefines.h"

#include "UI_interface.h"
#include "UI_view2d.h"

#include "ED_screen.h"
#include "ED_transform.h"

#include "graph_intern.h"

#include "RNA_access.h"
#include "RNA_define.h"

#include "WM_api.h"
#include "WM_types.h"

/* ************************** view-based operators **********************************/
// XXX should these really be here?

/* Set Cursor --------------------------------------------------------------------- */
/* The 'cursor' in the Graph Editor consists of two parts:
 *	1) Current Frame Indicator (as per ANIM_OT_change_frame)
 *	2) Value Indicator (stored per Graph Editor instance)
 */

/* Set the new frame number */
static void graphview_cursor_apply(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	SpaceIpo *sipo= CTX_wm_space_graph(C);
	
	/* adjust the frame 
	 * NOTE: sync this part of the code with ANIM_OT_change_frame
	 */
	CFRA= RNA_int_get(op->ptr, "frame");
	sound_seek_scene(C);
	
	/* set the cursor value */
	sipo->cursorVal= RNA_float_get(op->ptr, "value");
	
	/* send notifiers - notifiers for frame should force an update for both vars ok... */
	WM_event_add_notifier(C, NC_SCENE|ND_FRAME, scene);
}

/* ... */

/* Non-modal callback for running operator without user input */
static int graphview_cursor_exec(bContext *C, wmOperator *op)
{
	graphview_cursor_apply(C, op);
	return OPERATOR_FINISHED;
}

/* ... */

/* set the operator properties from the initial event */
static void graphview_cursor_setprops(bContext *C, wmOperator *op, wmEvent *event)
{
	ARegion *ar= CTX_wm_region(C);
	float viewx, viewy;
	int x, y;
	
	/* abort if not active region (should not really be possible) */
	if (ar == NULL)
		return;
	
	/* convert screen coordinates to region coordinates */
	x= event->x - ar->winrct.xmin;
	y= event->y - ar->winrct.ymin;
	
	/* convert from region coordinates to View2D 'tot' space */
	UI_view2d_region_to_view(&ar->v2d, x, y, &viewx, &viewy);
	
	/* store the values in the operator properties */
		/* frame is rounded to the nearest int, since frames are ints */
	RNA_int_set(op->ptr, "frame", (int)floor(viewx+0.5f));
	RNA_float_set(op->ptr, "value", viewy);
}

/* Modal Operator init */
static int graphview_cursor_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	/* Change to frame that mouse is over before adding modal handler,
	 * as user could click on a single frame (jump to frame) as well as
	 * click-dragging over a range (modal scrubbing).
	 */
	graphview_cursor_setprops(C, op, event);
	
	/* apply these changes first */
	graphview_cursor_apply(C, op);
	
	/* add temp handler */
	WM_event_add_modal_handler(C, op);
	return OPERATOR_RUNNING_MODAL;
}

/* Modal event handling of cursor changing */
static int graphview_cursor_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	/* execute the events */
	switch (event->type) {
		case ESCKEY:
			return OPERATOR_FINISHED;
		
		case MOUSEMOVE:
			/* set the new values */
			graphview_cursor_setprops(C, op, event);
			graphview_cursor_apply(C, op);
			break;
		
		case LEFTMOUSE: 
		case RIGHTMOUSE:
			/* we check for either mouse-button to end, as checking for ACTIONMOUSE (which is used to init 
			 * the modal op) doesn't work for some reason
			 */
			if (event->val==KM_RELEASE)
				return OPERATOR_FINISHED;
			break;
	}

	return OPERATOR_RUNNING_MODAL;
}

void GRAPH_OT_cursor_set(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Set Cursor";
	ot->idname= "GRAPH_OT_cursor_set";
	ot->description= "Interactively set the current frame number and value cursor";
	
	/* api callbacks */
	ot->exec= graphview_cursor_exec;
	ot->invoke= graphview_cursor_invoke;
	ot->modal= graphview_cursor_modal;
	ot->poll= ED_operator_ipo_active;
	
	/* flags */
	ot->flag= OPTYPE_BLOCKING;

	/* rna */
	RNA_def_int(ot->srna, "frame", 0, MINAFRAME, MAXFRAME, "Frame", "", MINAFRAME, MAXFRAME);
	RNA_def_float(ot->srna, "value", 0, FLT_MIN, FLT_MAX, "Value", "", -100.0f, 100.0f);
}

/* Toggle Handles ----------------------------------------------------------------- */

static int view_toggle_handles_exec (bContext *C, wmOperator *op)
{
	SpaceIpo *sipo= CTX_wm_space_graph(C);
	ARegion *ar= CTX_wm_region(C);
	
	if (sipo == NULL)
		return OPERATOR_CANCELLED;
	
	/* toggle flag to hide handles */
	sipo->flag ^= SIPO_NOHANDLES;
	
	/* request refresh of keys area */
	ED_region_tag_redraw(ar);
	
	return OPERATOR_FINISHED;
}

void GRAPH_OT_view_togglehandles (wmOperatorType *ot)
{
	/* identification */
	ot->name= "Show/Hide All Handles";
	ot->idname= "GRAPH_OT_handles_view_toggle";
	
	/* callbacks */
	ot->exec= view_toggle_handles_exec;
	ot->poll= ED_operator_ipo_active;
}

/* ************************** registration - operator types **********************************/

void graphedit_operatortypes(void)
{
	/* view */
	WM_operatortype_append(GRAPH_OT_view_togglehandles);
	WM_operatortype_append(GRAPH_OT_cursor_set);
	
	WM_operatortype_append(GRAPH_OT_previewrange_set);
	WM_operatortype_append(GRAPH_OT_view_all);
	WM_operatortype_append(GRAPH_OT_properties);
	
	WM_operatortype_append(GRAPH_OT_ghost_curves_create);
	WM_operatortype_append(GRAPH_OT_ghost_curves_clear);
	
	/* keyframes */
		/* selection */
	WM_operatortype_append(GRAPH_OT_clickselect);
	WM_operatortype_append(GRAPH_OT_select_all_toggle);
	WM_operatortype_append(GRAPH_OT_select_border);
	WM_operatortype_append(GRAPH_OT_select_column);
	WM_operatortype_append(GRAPH_OT_select_more);
	WM_operatortype_append(GRAPH_OT_select_less);
	
		/* editing */
	WM_operatortype_append(GRAPH_OT_snap);
	WM_operatortype_append(GRAPH_OT_mirror);
	WM_operatortype_append(GRAPH_OT_frame_jump);
	WM_operatortype_append(GRAPH_OT_handle_type);
	WM_operatortype_append(GRAPH_OT_interpolation_type);
	WM_operatortype_append(GRAPH_OT_extrapolation_type);
	WM_operatortype_append(GRAPH_OT_sample);
	WM_operatortype_append(GRAPH_OT_bake);
	WM_operatortype_append(GRAPH_OT_sound_bake);
	WM_operatortype_append(GRAPH_OT_smooth);
	WM_operatortype_append(GRAPH_OT_clean);
	WM_operatortype_append(GRAPH_OT_delete);
	WM_operatortype_append(GRAPH_OT_duplicate);
	
	WM_operatortype_append(GRAPH_OT_copy);
	WM_operatortype_append(GRAPH_OT_paste);
	
	WM_operatortype_append(GRAPH_OT_keyframe_insert);
	WM_operatortype_append(GRAPH_OT_click_insert);
	
	/* F-Curve Modifiers */
	WM_operatortype_append(GRAPH_OT_fmodifier_add);
	WM_operatortype_append(GRAPH_OT_fmodifier_copy);
	WM_operatortype_append(GRAPH_OT_fmodifier_paste);
}

/* ************************** registration - keymaps **********************************/

static void graphedit_keymap_keyframes (wmKeyConfig *keyconf, wmKeyMap *keymap)
{
	wmKeyMapItem *kmi;
	
	/* view */
	WM_keymap_add_item(keymap, "GRAPH_OT_handles_view_toggle", HKEY, KM_PRESS, KM_CTRL, 0);
		/* NOTE: 'ACTIONMOUSE' not 'LEFTMOUSE', as user may have swapped mouse-buttons
		 * This keymap is supposed to override ANIM_OT_change_frame, which does the same except it doesn't do y-values
		 */
	WM_keymap_add_item(keymap, "GRAPH_OT_cursor_set", ACTIONMOUSE, KM_PRESS, 0, 0);
	
	
	/* graph_select.c - selection tools */
		/* click-select */
	WM_keymap_add_item(keymap, "GRAPH_OT_clickselect", SELECTMOUSE, KM_PRESS, 0, 0);
	kmi= WM_keymap_add_item(keymap, "GRAPH_OT_clickselect", SELECTMOUSE, KM_PRESS, KM_ALT, 0);
		RNA_boolean_set(kmi->ptr, "column", 1);
	kmi= WM_keymap_add_item(keymap, "GRAPH_OT_clickselect", SELECTMOUSE, KM_PRESS, KM_SHIFT, 0);
		RNA_boolean_set(kmi->ptr, "extend", 1);
	kmi= WM_keymap_add_item(keymap, "GRAPH_OT_clickselect", SELECTMOUSE, KM_PRESS, KM_ALT|KM_SHIFT, 0);
		RNA_boolean_set(kmi->ptr, "extend", 1);
		RNA_boolean_set(kmi->ptr, "column", 1);
	kmi= WM_keymap_add_item(keymap, "GRAPH_OT_clickselect", SELECTMOUSE, KM_PRESS, KM_CTRL, 0);
		RNA_enum_set(kmi->ptr, "left_right", GRAPHKEYS_LRSEL_TEST);
	kmi= WM_keymap_add_item(keymap, "GRAPH_OT_clickselect", SELECTMOUSE, KM_PRESS, KM_CTRL|KM_ALT, 0);
		RNA_boolean_set(kmi->ptr, "curves", 1);
	kmi= WM_keymap_add_item(keymap, "GRAPH_OT_clickselect", SELECTMOUSE, KM_PRESS, KM_CTRL|KM_ALT|KM_SHIFT, 0);
		RNA_boolean_set(kmi->ptr, "curves", 1);
		RNA_boolean_set(kmi->ptr, "extend", 1);
	
		/* deselect all */
	WM_keymap_add_item(keymap, "GRAPH_OT_select_all_toggle", AKEY, KM_PRESS, 0, 0);
	RNA_boolean_set(WM_keymap_add_item(keymap, "GRAPH_OT_select_all_toggle", IKEY, KM_PRESS, KM_CTRL, 0)->ptr, "invert", 1);
	
		/* borderselect */
	WM_keymap_add_item(keymap, "GRAPH_OT_select_border", BKEY, KM_PRESS, 0, 0);
	RNA_boolean_set(WM_keymap_add_item(keymap, "GRAPH_OT_select_border", BKEY, KM_PRESS, KM_ALT, 0)->ptr, "axis_range", 1);
	
		/* column select */
	RNA_enum_set(WM_keymap_add_item(keymap, "GRAPH_OT_select_column", KKEY, KM_PRESS, 0, 0)->ptr, "mode", GRAPHKEYS_COLUMNSEL_KEYS);
	RNA_enum_set(WM_keymap_add_item(keymap, "GRAPH_OT_select_column", KKEY, KM_PRESS, KM_CTRL, 0)->ptr, "mode", GRAPHKEYS_COLUMNSEL_CFRA);
	RNA_enum_set(WM_keymap_add_item(keymap, "GRAPH_OT_select_column", KKEY, KM_PRESS, KM_SHIFT, 0)->ptr, "mode", GRAPHKEYS_COLUMNSEL_MARKERS_COLUMN);
	RNA_enum_set(WM_keymap_add_item(keymap, "GRAPH_OT_select_column", KKEY, KM_PRESS, KM_ALT, 0)->ptr, "mode", GRAPHKEYS_COLUMNSEL_MARKERS_BETWEEN);
	
		/* select more/less */
	WM_keymap_add_item(keymap, "GRAPH_OT_select_more", PADPLUSKEY, KM_PRESS, KM_CTRL, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_select_less", PADMINUS, KM_PRESS, KM_CTRL, 0);
	
	
	/* graph_edit.c */
		/* snap - current frame to selected keys */
		// TODO: maybe since this is called jump, we're better to have it on <something>-J?
	WM_keymap_add_item(keymap, "GRAPH_OT_frame_jump", SKEY, KM_PRESS, KM_CTRL|KM_SHIFT, 0);
		
		/* menu + single-step transform */
	WM_keymap_add_item(keymap, "GRAPH_OT_snap", SKEY, KM_PRESS, KM_SHIFT, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_mirror", MKEY, KM_PRESS, KM_SHIFT, 0);
	
	WM_keymap_add_item(keymap, "GRAPH_OT_handle_type", HKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_interpolation_type", TKEY, KM_PRESS, KM_SHIFT, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_extrapolation_type", EKEY, KM_PRESS, KM_SHIFT, 0);
	
	
		/* destructive */
	WM_keymap_add_item(keymap, "GRAPH_OT_clean", OKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_smooth", OKEY, KM_PRESS, KM_ALT, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_sample", OKEY, KM_PRESS, KM_SHIFT, 0);
	
	WM_keymap_add_item(keymap, "GRAPH_OT_bake", CKEY, KM_PRESS, KM_ALT, 0);
	
	WM_keymap_add_item(keymap, "GRAPH_OT_delete", XKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_delete", DELKEY, KM_PRESS, 0, 0);
	
	WM_keymap_add_item(keymap, "GRAPH_OT_duplicate", DKEY, KM_PRESS, KM_SHIFT, 0);
	
		/* insertkey */
	WM_keymap_add_item(keymap, "GRAPH_OT_keyframe_insert", IKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_click_insert", LEFTMOUSE, KM_PRESS, KM_CTRL, 0);
	
		/* copy/paste */
	WM_keymap_add_item(keymap, "GRAPH_OT_copy", CKEY, KM_PRESS, KM_CTRL, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_paste", VKEY, KM_PRESS, KM_CTRL, 0);
	
		/* auto-set range */
	WM_keymap_add_item(keymap, "GRAPH_OT_previewrange_set", PKEY, KM_PRESS, KM_CTRL|KM_ALT, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_view_all", HOMEKEY, KM_PRESS, 0, 0);
	
		/* F-Modifiers */
	RNA_boolean_set(WM_keymap_add_item(keymap, "GRAPH_OT_fmodifier_add", MKEY, KM_PRESS, KM_CTRL|KM_SHIFT, 0)->ptr, "only_active", 0);
	
	/* animation module */
		/* channels list 
		 * NOTE: these operators were originally for the channels list, but are added here too for convenience...
		 */
	WM_keymap_add_item(keymap, "ANIM_OT_channels_editable_toggle", TABKEY, KM_PRESS, 0, 0);
	
	/* transform system */
	transform_keymap_for_space(keyconf, keymap, SPACE_IPO);
}

/* --------------- */

void graphedit_keymap(wmKeyConfig *keyconf)
{
	wmKeyMap *keymap;
	
	/* keymap for all regions */
	keymap= WM_keymap_find(keyconf, "Graph Editor Generic", SPACE_IPO, 0);
	WM_keymap_add_item(keymap, "GRAPH_OT_properties", NKEY, KM_PRESS, 0, 0);

	/* channels */
	/* Channels are not directly handled by the Graph Editor module, but are inherited from the Animation module. 
	 * All the relevant operations, keymaps, drawing, etc. can therefore all be found in that module instead, as these
	 * are all used for the Graph Editor too.
	 */
	
	/* keyframes */
	keymap= WM_keymap_find(keyconf, "Graph Editor", SPACE_IPO, 0);
	graphedit_keymap_keyframes(keyconf, keymap);
}