#! /usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from .render import GerberContext
from operator import mul
import cairocffi as cairo
import math

SCALE = 300.


class GerberCairoContext(GerberContext):
    def __init__(self, surface=None, size=(1000, 1000)):
        GerberContext.__init__(self)
        if surface is None:
            self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
                                              size[0], size[1])
        else:
            self.surface = surface
        self.ctx = cairo.Context(self.surface)
        self.size = size
        self.ctx.translate(0, self.size[1])
        self.scale = (SCALE,SCALE)
        self.ctx.scale(1, -1)
        self.apertures = {}
        self.background = False

    def set_bounds(self, bounds):
        xbounds, ybounds = bounds
        self.ctx.rectangle(SCALE * xbounds[0], SCALE * ybounds[0], SCALE * (xbounds[1]- xbounds[0]), SCALE * (ybounds[1] - ybounds[0]))
        self.ctx.set_source_rgb(0,0,0)
        self.ctx.fill()

    def _render_line(self, line, color):
        start = map(mul, line.start, self.scale)
        end = map(mul, line.end, self.scale)
        self.ctx.set_source_rgb (*color)
        self.ctx.set_line_width(line.width * SCALE)
        self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)
        self.ctx.move_to(*start)
        self.ctx.line_to(*end)
        self.ctx.stroke()

    def _render_region(self, region, color):
        points = [tuple(map(mul, point, self.scale)) for point in region.points]
        self.ctx.set_source_rgb (*color)
        self.ctx.set_line_width(0)
        self.ctx.move_to(*points[0])
        for point in points[1:]:
            self.ctx.move_to(*point)
        self.ctx.fill()

    def _render_circle(self, circle, color):
        center = map(mul, circle.position, self.scale)
        self.ctx.set_source_rgb (*color)
        self.ctx.set_line_width(0)
        self.ctx.arc(*center, radius=circle.radius * SCALE, angle1=0, angle2=2 * math.pi)
        self.ctx.fill()

    def _render_rectangle(self, rectangle, color):
        ll = map(mul, rectangle.lower_left, self.scale)
        width, height = tuple(map(mul, (rectangle.width, rectangle.height), map(abs, self.scale)))
        self.ctx.set_source_rgb (*color)
        self.ctx.set_line_width(0)
        self.ctx.rectangle(*ll,width=width, height=height)
        self.ctx.fill()

    def _render_obround(self, obround, color):
        self._render_circle(obround.subshapes['circle1'], color)
        self._render_circle(obround.subshapes['circle2'], color)
        self._render_rectangle(obround.subshapes['rectangle'], color)

    def _render_drill(self, circle, color):
        self._render_circle(circle, color)

    def dump(self, filename):
        self.surface.write_to_png(filename)