# Copyright 2022 Lunar Ring. All rights reserved.
# Written by Johannes Stelzer, email stelzer@lunar-ring.ai twitter @j_stelzer
#
# 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.

import os, sys
import torch
torch.backends.cudnn.benchmark = False
import numpy as np
import warnings
warnings.filterwarnings('ignore')
import time
import subprocess
import warnings
import torch
from tqdm.auto import tqdm
from diffusers import StableDiffusionInpaintPipeline
from PIL import Image
import torch
from movie_util import MovieSaver
from typing import Callable, List, Optional, Union
from latent_blending import LatentBlending, add_frames_linear_interp
from stable_diffusion_holder import StableDiffusionHolder
torch.set_grad_enabled(False)

#%% First let us spawn a stable diffusion holder
fp_ckpt= "../stable_diffusion_models/ckpt/512-inpainting-ema.ckpt"
sdh = StableDiffusionHolder(fp_ckpt)

#%% Let's first make a source image and mask.
quality = 'medium'
depth_strength = 0.65 #Specifies how deep (in terms of diffusion iterations the first branching happens)
duration_transition = 7 # In seconds
fps = 30
seed0 = 190791709

# Spawn latent blending
lb = LatentBlending(sdh)
lb.load_branching_profile(quality=quality, depth_strength=depth_strength)
prompt1 = "photo of a futuristic alien temple in a desert, mystic, glowing, organic, intricate, sci-fi movie, mesmerizing, scary"
lb.set_prompt1(prompt1)
lb.init_inpainting(init_empty=True)
lb.set_seed(seed0)

# Run diffusion 
list_latents = lb.run_diffusion([lb.text_embedding1])
image_source = lb.sdh.latent2image(list_latents[-1])

mask_image = 255*np.ones([512,512], dtype=np.uint8)
mask_image[340:420, 170:280] = 0
mask_image = Image.fromarray(mask_image)


#%% Now let us compute a transition video with inpainting
# First inject back the latents that we already computed for our source image.
lb.inject_latents(list_latents, inject_img1=True)

# Then setup the seeds. Keep the one from the first image
fixed_seeds = [seed0, 6579436]

# Fix the prompts for the target    
prompt2 = "aerial photo of a futuristic alien temple in a blue coastal area, the sun is shining with a bright light"
lb.set_prompt1(prompt1)
lb.set_prompt2(prompt2)
lb.init_inpainting(image_source, mask_image)

# Run latent blending
imgs_transition = lb.run_transition(recycle_img1=True, fixed_seeds=fixed_seeds)

# Let's get more cheap frames via linear interpolation (duration_transition*fps frames)
imgs_transition_ext = add_frames_linear_interp(imgs_transition, duration_transition, fps)

# Save as MP4
fp_movie = "movie_example2.mp4"
if os.path.isfile(fp_movie):
    os.remove(fp_movie)
ms = MovieSaver(fp_movie, fps=fps, shape_hw=[lb.height, lb.width])
for img in tqdm(imgs_transition_ext):
    ms.write_frame(img)
ms.finalize()