# ##### 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.
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# ##### END GPL LICENSE BLOCK #####

# <pep8 compliant>


class UnifiedPaintPanel():
    # subclass must set
    # bl_space_type = 'IMAGE_EDITOR'
    # bl_region_type = 'UI'

    @staticmethod
    def paint_settings(context):
        toolsettings = context.tool_settings

        if context.sculpt_object:
            return toolsettings.sculpt
        elif context.vertex_paint_object:
            return toolsettings.vertex_paint
        elif context.weight_paint_object:
            return toolsettings.weight_paint
        elif context.image_paint_object:
            return toolsettings.image_paint
        elif context.particle_edit_object:
            return toolsettings.particle_edit

        return None

    @staticmethod
    def unified_paint_settings(parent, context):
        ups = context.tool_settings.unified_paint_settings
        parent.label(text="Unified Settings:")
        row = parent.row()
        row.prop(ups, "use_unified_size", text="Size")
        row.prop(ups, "use_unified_strength", text="Strength")
        if context.weight_paint_object:
            parent.prop(ups, "use_unified_weight", text="Weight")
        elif context.vertex_paint_object or context.image_paint_object:
            parent.prop(ups, "use_unified_color", text="Color")
        else:
            parent.prop(ups, "use_unified_color", text="Color")

    @staticmethod
    def prop_unified_size(parent, context, brush, prop_name, icon='NONE', text="", slider=False):
        ups = context.tool_settings.unified_paint_settings
        ptr = ups if ups.use_unified_size else brush
        parent.prop(ptr, prop_name, icon=icon, text=text, slider=slider)

    @staticmethod
    def prop_unified_strength(parent, context, brush, prop_name, icon='NONE', text="", slider=False):
        ups = context.tool_settings.unified_paint_settings
        ptr = ups if ups.use_unified_strength else brush
        parent.prop(ptr, prop_name, icon=icon, text=text, slider=slider)

    @staticmethod
    def prop_unified_weight(parent, context, brush, prop_name, icon='NONE', text="", slider=False):
        ups = context.tool_settings.unified_paint_settings
        ptr = ups if ups.use_unified_weight else brush
        parent.prop(ptr, prop_name, icon=icon, text=text, slider=slider)

    @staticmethod
    def prop_unified_color(parent, context, brush, prop_name, text=""):
        ups = context.tool_settings.unified_paint_settings
        ptr = ups if ups.use_unified_color else brush
        parent.prop(ptr, prop_name, text=text)

    @staticmethod
    def prop_unified_color_picker(parent, context, brush, prop_name, value_slider=True):
        ups = context.tool_settings.unified_paint_settings
        ptr = ups if ups.use_unified_color else brush
        parent.template_color_picker(ptr, prop_name, value_slider=value_slider)


def brush_texpaint_common(panel, context, layout, brush, settings):
    capabilities = brush.image_paint_capabilities

    col = layout.column()

    if brush.image_tool in {'DRAW', 'FILL'}:
        if brush.blend not in {'ERASE_ALPHA', 'ADD_ALPHA'}:
            if not brush.use_gradient:
                panel.prop_unified_color_picker(col, context, brush, "color", value_slider=True)

            if settings.palette:
                col.template_palette(settings, "palette", color=True)

            if brush.use_gradient:
                col.label("Gradient Colors")
                col.template_color_ramp(brush, "gradient", expand=True)

                if brush.image_tool != 'FILL':
                    col.label("Background Color")
                    row = col.row(align=True)
                    panel.prop_unified_color(row, context, brush, "secondary_color", text="")

                if brush.image_tool == 'DRAW':
                    col.prop(brush, "gradient_stroke_mode", text="Mode")
                    if brush.gradient_stroke_mode in {'SPACING_REPEAT', 'SPACING_CLAMP'}:
                        col.prop(brush, "grad_spacing")
                elif brush.image_tool == 'FILL':
                    col.prop(brush, "gradient_fill_mode")
            else:
                row = col.row(align=True)
                panel.prop_unified_color(row, context, brush, "color", text="")
                if brush.image_tool == 'FILL':
                    col.prop(brush, "fill_threshold")
                else:
                    panel.prop_unified_color(row, context, brush, "secondary_color", text="")
                    row.separator()
                    row.operator("paint.brush_colors_flip", icon='FILE_REFRESH', text="")

    elif brush.image_tool == 'SOFTEN':
        col = layout.column(align=True)
        col.row().prop(brush, "direction", expand=True)
        col.separator()
        col.prop(brush, "sharp_threshold")
        col.prop(brush, "blur_kernel_radius")
        col.separator()
        col.prop(brush, "blur_mode")
    elif brush.image_tool == 'MASK':
        col.prop(brush, "weight", text="Mask Value", slider=True)

    elif brush.image_tool == 'CLONE':
        col.separator()
        col.prop(brush, "clone_image", text="Image")
        col.prop(brush, "clone_alpha", text="Alpha")

    col.separator()

    if capabilities.has_radius:
        row = col.row(align=True)
        panel.prop_unified_size(row, context, brush, "size", slider=True, text="Radius")
        panel.prop_unified_size(row, context, brush, "use_pressure_size")

        row = col.row(align=True)

    if capabilities.has_space_attenuation:
        row.prop(brush, "use_space_attenuation", toggle=True, icon_only=True)

    panel.prop_unified_strength(row, context, brush, "strength", text="Strength")
    panel.prop_unified_strength(row, context, brush, "use_pressure_strength")

    if brush.image_tool in {'DRAW', 'FILL'}:
        col.separator()
        col.prop(brush, "blend", text="Blend")

    col = layout.column()

    # use_accumulate
    if capabilities.has_accumulate:
        col = layout.column(align=True)
        col.prop(brush, "use_accumulate")

    col.prop(brush, "use_alpha")
    col.prop(brush, "use_gradient")

    col.separator()
    col.template_ID(settings, "palette", new="palette.new")


# Used in both the View3D toolbar and texture properties
def brush_texture_settings(layout, brush, sculpt):
    tex_slot = brush.texture_slot

    layout.label(text="Brush Mapping:")

    # map_mode
    if sculpt:
        layout.row().prop(tex_slot, "map_mode", text="")
        layout.separator()
    else:
        layout.row().prop(tex_slot, "tex_paint_map_mode", text="")
        layout.separator()

    if tex_slot.map_mode == 'STENCIL':
        if brush.texture and brush.texture.type == 'IMAGE':
            layout.operator("brush.stencil_fit_image_aspect")
        layout.operator("brush.stencil_reset_transform")

    # angle and texture_angle_source
    if brush.brush_capabilities.has_texture_angle:
        col = layout.column()
        col.label(text="Angle:")
        row = col.row(align=True)
        if brush.brush_capabilities.has_texture_angle_source:
            if brush.brush_capabilities.has_random_texture_angle:
                if sculpt:
                    if brush.sculpt_capabilities.has_random_texture_angle:
                        row.prop(brush, "texture_angle_source_random", text="")
                    else:
                        row.prop(brush, "texture_angle_source_no_random", text="")

                else:
                    row.prop(brush, "texture_angle_source_random", text="")
            else:
                row.prop(brush, "texture_angle_source_no_random", text="")

        row.prop(tex_slot, "angle", text="")

    # scale and offset
    split = layout.split()
    split.prop(tex_slot, "offset")
    split.prop(tex_slot, "scale")

    if sculpt:
        # texture_sample_bias
        col = layout.column(align=True)
        col.label(text="Sample Bias:")
        col.prop(brush, "texture_sample_bias", slider=True, text="")


def brush_mask_texture_settings(layout, brush):
    mask_tex_slot = brush.mask_texture_slot

    layout.label(text="Mask Mapping:")

    # map_mode
    layout.row().prop(mask_tex_slot, "mask_map_mode", text="")
    layout.separator()

    if mask_tex_slot.map_mode == 'STENCIL':
        if brush.mask_texture and brush.mask_texture.type == 'IMAGE':
            layout.operator("brush.stencil_fit_image_aspect").mask = True
        layout.operator("brush.stencil_reset_transform").mask = True

    col = layout.column()
    col.prop(brush, "use_pressure_masking", text="")
    col.label(text="Angle:")
    col.active = brush.brush_capabilities.has_texture_angle
    col.prop(mask_tex_slot, "angle", text="")

    # scale and offset
    split = layout.split()
    split.prop(mask_tex_slot, "offset")
    split.prop(mask_tex_slot, "scale")