# coding:utf-8
import openshot
import re
from PIL import Image,ImageDraw,ImageFont

def cKey(r,g,b,fuzz):
    col=openshot.Color()
    col.red=openshot.Keyframe(r)
    col.green=openshot.Keyframe(g)
    col.blue=openshot.Keyframe(b)
    return openshot.ChromaKey(col, openshot.Keyframe(fuzz))

def video_writer_init(path):
    w = openshot.FFmpegWriter(path)
    w.SetAudioOptions(True, "aac", 44100, 2, openshot.LAYOUT_STEREO, 3000000)
    w.SetVideoOptions(True, "libx264", openshot.Fraction(30000, 1000), 1280, 720,
        openshot.Fraction(1, 1), False, False, 3000000)
    return w

def video_photo_clip(video=None,layer=None, position=None, end=None
    ,scale_x=1,scale_y=1,location_x=0,location_y=0,ck=None,audio=True):
    clip = openshot.Clip(video)
    clip.Layer(layer)
    clip.Position(position)
    clip.End(end)
    clip.scale_x=openshot.Keyframe(scale_x)
    clip.scale_y=openshot.Keyframe(scale_y)
    clip.location_x=openshot.Keyframe(location_x)
    clip.location_y=openshot.Keyframe(location_y)
    
    if ck!=None:
        clip.AddEffect(ck)
    if audio==True:
        clip.has_audio=openshot.Keyframe(1)
    else:
        clip.has_audio=openshot.Keyframe(0)
    return clip

def trim_punctuation(s):
    pat_block = u'[^\u4e00-\u9fff0-9a-zA-Z]+'
    pattern = u'([0-9]+{0}[0-9]+)|{0}'.format(pat_block)
    res = re.sub(pattern, lambda x: x.group(1) if x.group(1) else u" " ,s)
    return res

def txt2image(content, save_target,lang='zh'):
    unicode_text = trim_punctuation(content)
    font = ''
    if lang=='zh':
        font = ImageFont.truetype(font="font/DFT_B7.ttc", size=38)
    else :
        font = ImageFont.truetype(font="font/arial.ttf", size=38)
    text_width, text_height = font.getsize(unicode_text)
    canvas = Image.new('RGBA', (700, 500), (255, 255, 255, 0) )
    draw = ImageDraw.Draw(canvas)
    text= unicode_text
    draw.text((5,5), text,'black', font)
    canvas.save(save_target, "PNG")

def text_to_short_vedio(bg,title_bg,text,title,time):
    t = openshot.Timeline(1280, 720, openshot.Fraction(30000, 1000), 44100, 2, openshot.LAYOUT_STEREO)
    t.Open()
    
    ck=cKey(0,254,0,270)
    ck_anchor=cKey(0,255,0,320)

    anchor = openshot.FFmpegReader(bg) # 影片
    anchor.Open()
    anchor_clip = video_photo_clip(video=anchor, layer=2, scale_x=0.59, scale_y=0.59,location_x=-0.04, location_y=-0.04, position=0, end=5, ck=ck_anchor, audio=True)
    t.AddClip(anchor_clip)
    anchor.Close()

    anchor3 = openshot.FFmpegReader(title_bg) # 樣板
    anchor3.Open()
    anchor_clip3 = video_photo_clip(video=anchor3, layer=1, scale_x=1, scale_y=1,
                                   location_x=0, location_y=0, position=0, end=5, ck=ck_anchor, audio=True)
    t.AddClip(anchor_clip3)
    anchor3.Close()

    txt2image(text, "tmp/save_target.png",lang='zh')
    text_anchor = openshot.QtImageReader("tmp/save_target.png")
    text_anchor.Open()
    text_anchor_clip = video_photo_clip(video=text_anchor,layer=4,scale_x=1,scale_y=1,
            location_x=0.27,location_y=0.83,position=0, end=5,ck=ck_anchor,audio=True)
    t.AddClip(text_anchor_clip)
    text_anchor.Close()

    txt2image(title, "tmp/save_title.png",lang='zh')
    text_title = openshot.QtImageReader("tmp/save_title.png")
    text_title.Open()
    text_title_clip = video_photo_clip(video=text_title,layer=5,scale_x=0.5,scale_y=0.5,
            location_x=0.5,location_y=-0.145,position=0, end=5,ck=ck_anchor,audio=True)
    t.AddClip(text_title_clip)
    text_title.Close()


    w = video_writer_init("/app/output/test_op.mp4")
    w.Open()
    # frames = int(t.info.fps)*int(time)
    frames = t.info.fps.ToInt()*int(time)
    print('結果一',frames)
    for n in range(frames):
        # tmp = n%(int(t.info.fps)*3) +int(t.info.fps)*int(2)
        f=t.GetFrame(n)
        w.WriteFrame(f)

    t.Close()
    w.Close()


if __name__ == '__main__':
    text_to_short_vedio("/app/input/movie_main/C0050.mp4","/app/examples/主播示意1.mp4","測試content","標題測試",14)