"""
    Flowblade Movie Editor is a nonlinear video editor.
    Copyright 2012 Janne Liljeblad.

    This file is part of Flowblade Movie Editor <https://github.com/jliljebl/flowblade/>.

    Flowblade Movie Editor 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.

    Flowblade Movie Editor 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 Flowblade Movie Editor.  If not, see <http://www.gnu.org/licenses/>.
"""

"""
Modeule handles displaying tool menu, tool keyboard shortuts and workflow configuration activating and moving tools,
and setting relevant timeline behaviours.

"""

import gi
gi.require_version('Gtk', '3.0')

from gi.repository import Gtk
from gi.repository import Gdk

import appconsts
import editorpersistance
import gui
import guipopover
import guiutils
import respaths


# Initial layouts.
LAYOUT_MONITOR_CENTER = 0
LAYOUT_MEDIA_PANEL_LEFT = 1
LAYOUT_MONITOR_LEFT = 2
LAYOUT_TOP_ROW_FOUR = 3

# Default compositing modes. We have different enums here because of different presentation order.
COMPOSITING_MODE_STANDARD_FULL_TRACK = 0
COMPOSITING_MODE_TOP_DOWN_FREE_MOVE = 1
COMPOSITING_MODE_STANDARD_AUTO_FOLLOW = 2 # DEPRECATED

# Colors
SELECTED_BG = Gdk.RGBA(0.1, 0.31, 0.58,1.0)
WHITE_TEXT = Gdk.RGBA(0.9, 0.9, 0.9,1.0)
DARK_TEXT = Gdk.RGBA(0.1, 0.1, 0.1,1.0)
        
# Timeline tools data
_TOOLS_DATA = None
_TOOL_TIPS = None
_PREFS_TOOL_TIPS = None

# Tool items in dock if used.
dock_items = None

def init_data():
    global _TOOLS_DATA, _TOOL_TIPS, _PREFS_TOOL_TIPS
    _TOOLS_DATA = { appconsts.TLINE_TOOL_INSERT:        (_("Insert"), "insertmove_cursor.png", "editools.insert"),
                    appconsts.TLINE_TOOL_OVERWRITE:     (_("Move"), "overwrite_cursor.png", "editools.overwrite"),
                    appconsts.TLINE_TOOL_TRIM:          (_("Trim"), "oneroll_cursor.png", "editools.trim"),                         # DEPRECATED; NOT AVAILABLE TO USERS ANYMORE.
                    appconsts.TLINE_TOOL_ROLL:          (_("Roll"), "tworoll_cursor.png", "editools.roll"),                         # DEPRECATED; NOT AVAILABLE TO USERS ANYMORE.
                    appconsts.TLINE_TOOL_SLIP:          (_("Slip"), "slide_cursor.png", "editools.slip"),                           # DEPRECATED; NOT AVAILABLE TO USERS ANYMORE.
                    appconsts.TLINE_TOOL_SPACER:        (_("Spacer"), "multimove_cursor.png", "editools.spacer"),
                    appconsts.TLINE_TOOL_BOX:           (_("Box"), "overwrite_cursor_box.png", "editools.box"),                     # DEPRECATED; NOT AVAILABLE TO USERS ANYMORE.
                    appconsts.TLINE_TOOL_RIPPLE_TRIM:   (_("Ripple Trim"), "oneroll_cursor_ripple.png", "editools.rippletrim"),     # DEPRECATED; NOT AVAILABLE TO USERS ANYMORE.
                    appconsts.TLINE_TOOL_CUT:           (_("Cut"), "cut_cursor.png", "editools.cut"),
                    appconsts.TLINE_TOOL_KFTOOL:        (_("Keyframe"), "kftool_cursor.png", "editools.kftool"),
                    appconsts.TLINE_TOOL_MULTI_TRIM:    (_("Multitrim"), "multitrim_cursor.png", "editools.multitrim")
                  }
                  
    _TOOL_TIPS =  { appconsts.TLINE_TOOL_INSERT:        _("<b>Left Mouse</b> to move and insert single clip between clips.\n<b>CTRL + Left Mouse</b> to select and move clip range.\n\n<b>Left Mouse</b> on clip ends to trim clip length."),
                    appconsts.TLINE_TOOL_OVERWRITE:     _("<b>Left Mouse</b> to select a clip, or to move clip or clip range into new position.\n<b>CTRL + Left Mouse</b> to select a clip range.\n\n<b>Left Mouse</b> near clip's end to trim clip length.n\n<b>ALT + Left Mouse</b> near clip's end to overwrite trim clip length.<b>\n\nLeft Mouse Drag</b> to draw a box to select a group of clips. Multitrack selection disallows moving clips to another track."),
                    appconsts.TLINE_TOOL_TRIM:          _("<b>Left Mouse</b> to trim closest clip end.\n<b>Left or Right Arrow Key</b> + <b>Enter Key</b> to do the edit using keyboard."), 
                    appconsts.TLINE_TOOL_ROLL:          _("<b>Left Mouse</b> to move closest edit point between 2 clips.\n<b>Left or Right Arrow Key</b> + <b>Enter Key</b> to do the edit using keyboard."), 
                    appconsts.TLINE_TOOL_SLIP:          _("<b>Left Mouse</b> to move clip contents within clip.\n<b>Left or Right Arrow Key</b> + <b>Enter Key</b> to do the edit using keyboard."), 
                    appconsts.TLINE_TOOL_SPACER:        _("<b>Left Mouse</b> to move clip under cursor and all clips after it forward or backward, overwrites not allowed.\n<b>CTRL + Left Mouse</b> to move clip under cursor and all clips after it <b>on the same track</b> forward or backward, overwrites not allowed."), 
                    appconsts.TLINE_TOOL_BOX:           _("<b>1. Left Mouse</b> to draw a box to select a group of clips.\n<b>2. Left Mouse</b> inside the box to move selected clips forward or backward."), 
                    appconsts.TLINE_TOOL_RIPPLE_TRIM:   _("<b>Left Mouse</b> to trim closest clip end and move all clips after it to maintain sync, overwrites not allowed.\n<b>Left or Right Arrow Key</b> + <b>Enter Key</b> to do the edit using keyboard."), 
                    appconsts.TLINE_TOOL_CUT:           _("<b>Left Mouse</b> to cut clip under cursor.\n<b>CTRL + Left Mouse</b> to cut clips on all tracks at cursor position."), 
                    appconsts.TLINE_TOOL_KFTOOL:        _("Click <b>Left Mouse</b> on Clip to init Volume Keyframe editing, Brightness for media with no audio data.\nUse Hamburger menu to select other values to edit.\n<b>Left Mouse</b> to create or drag keyframes.\n<b>Left Mouse + Control</b> between keyframes drag and set same value for both.\n<b>Left Mouse + Shift</b> moves all keyframes after selected keyframe.\n<b>Delete Key</b> to delete active Keyframe."),
                    appconsts.TLINE_TOOL_MULTI_TRIM:    _("Position cursor near or on clip edges for <b>Trim</b> and <b>Roll</b> edits.\nPosition cursor on clip center for <b>Slip</b> edit.\nDrag with <b>Left Mouse</b> to do edits.\n\n<b>Enter Key</b> to start keyboard edit, <b>Left or Right Arrow Key</b> to move edit point.\n<b>Enter Key</b> to complete keyboard edit.")
                  }

    editorpersistance.prefs.active_tools = [2, 11, 6, 1, 9, 10] 


# --------------------------------------------------------------- interface
def get_tline_tool_working_set():
    tools = []
    
    kb_shortcut_number = 1
    for tool_id in editorpersistance.prefs.active_tools:
        tool_name, tool_icon_file, action_item_id = _TOOLS_DATA[tool_id]
        tools.append((tool_name, kb_shortcut_number))

        kb_shortcut_number = kb_shortcut_number + 1

    return tools
    
# --------------------------------------------------------------- tools menu
def get_tline_tool_popup_menu(event, callback):
    toolsdata = []
    
    kb_shortcut_number = 1
    for tool_id in editorpersistance.prefs.active_tools:
        tool_name, tool_icon_file, action_item_id = _TOOLS_DATA[tool_id]
        toolpopover_data = (tool_name, tool_icon_file, action_item_id, tool_id, _get_tooltip_text(tool_id))
        toolsdata.append(toolpopover_data)
            
    guipopover.edittools_popover_custom_show(gui.editor_window.tool_selector, toolsdata, gui.editor_window.tool_selector.widget, callback)
    
def _tools_menu_hidden(tools_menu, menu_items):
    # needed to make number 1-9 work elsewhere in the application
    for menu_item in menu_items:
        menu_item.set_accel_path(None)

def _get_image_menu_item(tool_icon_file, text, callback, tool_id):
    item = Gtk.ImageMenuItem()
    tool_img = Gtk.Image.new_from_file(respaths.IMAGE_PATH + tool_icon_file)
        
    item.set_image(tool_img)
    item.connect("activate", callback, tool_id)
    item.set_always_show_image(True)
    item.set_use_stock(False)
    item.set_label(text)
    if editorpersistance.prefs.show_tool_tooltips:
        item.set_tooltip_markup(_get_tooltip_text(tool_id))
    item.show()
    return item

def _get_tooltip_text(tool_id):
    text = _TOOL_TIPS[tool_id]

    return text


# ---------------------------------------------------- tools dock
def get_tline_tool_dock():
    dock = Gtk.VBox()
    global dock_items
    dock_items = []
    kb_shortcut_number = 1
    for tool_id in editorpersistance.prefs.active_tools:
        tool_name, tool_icon_file, action_item_id = _TOOLS_DATA[tool_id]

        dock_item = _get_tool_dock_item(kb_shortcut_number, tool_icon_file, tool_name, tool_id)
        dock.pack_start(dock_item.widget, False, False, 0)
        dock_items.append(dock_item)
        if kb_shortcut_number == 1:
            dock_item.set_item_color(True)
        kb_shortcut_number = kb_shortcut_number + 1

    dock.pack_start(Gtk.Label(), True, True, 0)

    align = guiutils.set_margins(dock, 10, 0, 0, 0)

    frame = Gtk.Frame()
    frame.add(align)
    guiutils.set_margins(frame, 0, 0, 1, 0)
    return frame

def update_tool_dock():
    if editorpersistance.prefs.tools_selection == appconsts.TOOL_SELECTOR_IS_LEFT_DOCK:
        gui.editor_window.update_tool_dock()

def _get_tool_dock_item(kb_shortcut_number, tool_icon_file, tool_name, tool_id):
    dock_item = ToolDockItem(kb_shortcut_number, tool_icon_file, tool_name, tool_id)
    return dock_item

def _tool_dock_item_press(tool_id, tool_dock_item):
    for item in dock_items:
        item.set_item_color(False)
    tool_dock_item.set_item_color(True)
    gui.editor_window.tline_cursor_manager.tool_selector_item_activated(None, None, tool_id)

def set_default_tool_dock_item_selected():
    for item in dock_items:
        item.set_item_color(False)
    dock_items[0].set_item_color(True)



class ToolDockItem:
    def __init__(self, kb_shortcut_number, tool_icon_file, tool_name, tool_id):
        tool_img = Gtk.Image.new_from_file(respaths.IMAGE_PATH + tool_icon_file)
        guiutils.set_margins(tool_img, 5, 5, 9, 7)

        self.widget = Gtk.EventBox()
        self.widget.connect("button-press-event", lambda w,e: _tool_dock_item_press(tool_id, self))

        self.widget.add_events(Gdk.EventMask.KEY_PRESS_MASK)
        if editorpersistance.prefs.show_tool_tooltips:
            self.widget.set_tooltip_markup("<b>" + tool_name + " - " + _("Keyboard shortcut: ") + str(kb_shortcut_number) + "</b>" "\n\n" + _get_tooltip_text(tool_id))
        
        self.widget.add(tool_img)

    def set_item_color(self, selected):
        if selected == True:
            self.widget.override_background_color(Gtk.StateType.NORMAL, SELECTED_BG)
        else:
            color = Gdk.RGBA(red=1.0, green=1.0, blue=1.0, alpha=1.0)
            color.parse("#292929")
            self.widget.override_background_color(Gtk.StateType.NORMAL, color)


# ------------------------------------------------------------- keyboard shortcuts
def tline_tool_keyboard_selected(event):
  
    try:
        state = event.get_state()
        if state & Gdk.ModifierType.CONTROL_MASK or state & Gdk.ModifierType.MOD1_MASK or state & Gdk.ModifierType.SHIFT_MASK:
            # CTRL, ALT, SHIFT + number may have other uses then selecting tools.
            return False

        keyboard_number = int(Gdk.keyval_name(event.keyval).lower())
        tool_id = editorpersistance.prefs.active_tools[keyboard_number - 1]
        gui.editor_window.tline_cursor_manager.change_tool(tool_id)
        for item in dock_items:
            item.set_item_color(False)
        dock_items[keyboard_number - 1].set_item_color(True)
        return True
    except:
        # This fails if a valid number was not pressed, so probably most times.
        pass

    return False

def select_default_tool():
    tool_id = editorpersistance.prefs.active_tools[0]
    gui.editor_window.tline_cursor_manager.change_tool(tool_id)
