import gradio as gr
from PIL import Image
from moviepy.editor import VideoFileClip, AudioFileClip
import os
from openai import OpenAI
import subprocess
from pathlib import Path
import uuid
import tempfile
import shlex
import shutil

# Predefined password
PASSWORD = "Walone4u"  # Change this to your desired password

# Supported models configuration
MODELS = {
    "deepseek-ai/DeepSeek-V3": {
        "base_url": "https://api.deepseek.com/v1",
        "env_key": "DEEPSEEK_API_KEY",
    },
    "Qwen/Qwen2.5-Coder-32B-Instruct": {
        "base_url": "https://api-inference.huggingface.co/v1/",
        "env_key": "HF_TOKEN",
    },
}

# Initialize client with first available model
client = OpenAI(
    base_url=next(iter(MODELS.values()))["base_url"],
    api_key=os.environ[next(iter(MODELS.values()))["env_key"]],
)

allowed_medias = [
    ".png",
    ".jpg",
    ".webp",
    ".jpeg",
    ".tiff",
    ".bmp",
    ".gif",
    ".svg",
    ".mp3",
    ".wav",
    ".ogg",
    ".mp4",
    ".avi",
    ".mov",
    ".mkv",
    ".flv",
    ".wmv",
    ".webm",
    ".mpg",
    ".mpeg",
    ".m4v",
    ".3gp",
    ".3g2",
    ".3gpp",
]

def get_files_infos(files):
    results = []
    for file in files:
        file_path = Path(file.name)
        info = {}
        info["size"] = os.path.getsize(file_path)
        info["name"] = file_path.name.replace(" ", "_")
        file_extension = file_path.suffix

        if file_extension in (".mp4", ".avi", ".mkv", ".mov"):
            info["type"] = "video"
            video = VideoFileClip(file.name)
            info["duration"] = video.duration
            info["dimensions"] = "{}x{}".format(video.size[0], video.size[1])
            if video.audio:
                info["type"] = "video/audio"
                info["audio_channels"] = video.audio.nchannels
            video.close()
        elif file_extension in (".mp3", ".wav"):
            info["type"] = "audio"
            audio = AudioFileClip(file.name)
            info["duration"] = audio.duration
            info["audio_channels"] = audio.nchannels
            audio.close()
        elif file_extension in (".png", ".jpg", ".jpeg", ".tiff", ".bmp", ".gif", ".svg"):
            info["type"] = "image"
            img = Image.open(file.name)
            info["dimensions"] = "{}x{}".format(img.size[0], img.size[1])
        results.append(info)
    return results

def get_completion(prompt, files_info, top_p, temperature, model_choice):
    files_info_string = "| Type | Name | Dimensions | Duration | Audio Channels |\n"
    files_info_string += "|------|------|------------|-----------|--------|\n"

    for file_info in files_info:
        dimensions = file_info.get("dimensions", "-")
        duration = f"{file_info.get('duration', '-')}s" if "duration" in file_info else "-"
        audio = f"{file_info.get('audio_channels', '-')} channels" if "audio_channels" in file_info else "-"
        files_info_string += f"| {file_info['type']} | {file_info['name']} | {dimensions} | {duration} | {audio} |\n"

    messages = [
        {
            "role": "system",
            "content": """
You are a very experienced media engineer, controlling a UNIX terminal.
You are an FFMPEG expert with years of experience and multiple contributions to the FFMPEG project.

You are given:
(1) a set of video, audio and/or image assets. Including their name, duration, dimensions and file size
(2) the description of a new video you need to create from the list of assets

Your objective is to generate the SIMPLEST POSSIBLE single ffmpeg command to create the requested video.

Key requirements:
    - Use the absolute minimum number of ffmpeg options needed
    - Avoid complex filter chains or filter_complex if possible
    - Prefer simple concatenation, scaling, and basic filters
    - Output exactly ONE command that will be directly pasted into the terminal
    - Never output multiple commands chained together
    - Output the command in a single line (no line breaks or multiple lines)
    - If the user asks for waveform visualization make sure to set the mode to `line` with and the use the full width of the video. Also concatenate the audio into a single channel.
    - For image sequences: Use -framerate and pattern matching (like 'img%d.jpg') when possible, falling back to individual image processing with -loop 1 and appropriate filters only when necessary.
    - When showing file operations or commands, always use explicit paths and filenames without wildcards - avoid using asterisk (*) or glob patterns. Instead, use specific numbered sequences (like %d), explicit file lists, or show the full filename.

Remember: Simpler is better. Only use advanced ffmpeg features if absolutely necessary for the requested output.
""",
        },
        {
            "role": "user",
            "content": f"""Always output the media as video/mp4 and output file with "output.mp4". Provide only the shell command without any explanations.
The current assets and objective follow. Reply with the FFMPEG command:

AVAILABLE ASSETS LIST:

{files_info_string}

OBJECTIVE: {prompt} and output at "output.mp4"
YOUR FFMPEG COMMAND:
         """,
        },
    ]
    try:
        print("\n=== COMPLETE PROMPT ===")
        for msg in messages:
            print(f"\n[{msg['role'].upper()}]:")
            print(msg["content"])
        print("=====================\n")

        if model_choice not in MODELS:
            raise ValueError(f"Model {model_choice} is not supported")

        model_config = MODELS[model_choice]
        client.base_url = model_config["base_url"]
        client.api_key = os.environ[model_config["env_key"]]
        model = "deepseek-chat" if "deepseek" in model_choice.lower() else model_choice

        completion = client.chat.completions.create(
            model=model,
            messages=messages,
            temperature=temperature,
            top_p=top_p,
            max_tokens=2048,
        )
        content = completion.choices[0].message.content
        if "```" in content:
            import re
            command = re.search(r"```(?:sh|bash)?\n(.*?)\n```", content, re.DOTALL)
            if command:
                command = command.group(1).strip()
            else:
                command = content.replace("\n", "")
        else:
            command = content.replace("\n", "")

        command = command.replace("output.mp4", "")
        return command
    except Exception as e:
        raise Exception("API Error")

def update(files, prompt, top_p=1, temperature=1, model_choice="Qwen/Qwen2.5-Coder-32B-Instruct"):
    if prompt == "":
        raise gr.Error("Please enter a prompt.")

    files_info = get_files_infos(files)
    for file_info in files_info:
        if file_info["type"] == "video":
            if file_info["duration"] > 180:
                raise gr.Error("Please make sure all videos are less than 3 minute long.")
        if file_info["size"] > 100000000:
            raise gr.Error("Please make sure all files are less than 100MB in size.")

    attempts = 0
    while attempts < 2:
        print("ATTEMPT", attempts)
        try:
            command_string = get_completion(prompt, files_info, top_p, temperature, model_choice)
            print(f"""///PROMTP {prompt} \n\n/// START OF COMMAND ///:\n\n{command_string}\n\n/// END OF COMMAND ///\n\n""")

            args = shlex.split(command_string)
            if args[0] != "ffmpeg":
                raise Exception("Command does not start with ffmpeg")
            temp_dir = tempfile.mkdtemp()
            for file in files:
                file_path = Path(file.name)
                sanitized_name = file_path.name.replace(" ", "_")
                shutil.copy(file_path, Path(temp_dir) / sanitized_name)

            ffmpg_dry_run = subprocess.run(
                args + ["-f", "null", "-"],
                stderr=subprocess.PIPE,
                text=True,
                cwd=temp_dir,
            )
            if ffmpg_dry_run.returncode == 0:
                print("Command is valid.")
            else:
                print("Command is not valid. Error output:")
                print(ffmpg_dry_run.stderr)
                raise Exception("FFMPEG generated command is not valid. Please try something else.")

            output_file_name = f"output_{uuid.uuid4()}.mp4"
            output_file_path = str((Path(temp_dir) / output_file_name).resolve())
            final_command = args + ["-y", output_file_path]
            print(f"\n=== EXECUTING FFMPEG COMMAND ===\nffmpeg {' '.join(final_command[1:])}\n")
            subprocess.run(final_command, cwd=temp_dir)
            generated_command = f"### Generated Command\n```bash\nffmpeg {' '.join(args[1:])} -y output.mp4\n```"
            return output_file_path, gr.update(value=generated_command)
        except Exception as e:
            attempts += 1
            if attempts >= 2:
                print("FROM UPDATE", e)
                raise gr.Error(e)

def check_password(password):
    return password == PASSWORD

# Custom CSS for mobile responsiveness
custom_css = """
@media (max-width: 768px) {
    .gradio-container {
        flex-direction: column;
    }
    .gradio-column {
        width: 100% !important;
    }
}
"""

with gr.Blocks(css=custom_css) as demo:
    with gr.Row(visible=True) as login_interface:
        with gr.Column():
            password_input = gr.Textbox(label="Enter Walone AI Key", type="password")
            login_button = gr.Button("Login")
            login_status = gr.Textbox(label="Login Status", interactive=False)

    with gr.Row(visible=False) as main_interface:
        gr.Markdown(
            """
            # 🏞 AI Video Composer (AI နဲ့ Video ပေါင်းစပ်ဖန်တီးမှု နည်းပညာ )
            AI အသုံးပြုပြီး ကိုယ့်မှာရှိသည့် ပုံ အသံဖိုင် video ဖိုင် စသည့် media fil များကို ပေါင်းစပ်ပြီး video ထုတ်ခိုင်းနိုင်ပါတယ် and let [Qwen2.5-Code] or [DeepSeek-V3 for Myanmar prompt] generate a new video for you (using FFMPEG).
        """,
            elem_id="header",
        )
        with gr.Column():
            user_files = gr.File(
                file_count="multiple",
                label="Media files",
                file_types=allowed_medias,
            )
            user_prompt = gr.Textbox(
                placeholder="eg: Remove the 3 first seconds of the video",
                label="Instructions",
            )
            btn = gr.Button("Run")
            with gr.Accordion("Parameters", open=False):
                model_choice = gr.Radio(
                    choices=list(MODELS.keys()),
                    value=list(MODELS.keys())[0],
                    label="Model",
                )
                top_p = gr.Slider(
                    minimum=-0,
                    maximum=1.0,
                    value=0.7,
                    step=0.05,
                    interactive=True,
                    label="Top-p (nucleus sampling)",
                )
                temperature = gr.Slider(
                    minimum=-0,
                    maximum=5.0,
                    value=0.1,
                    step=0.1,
                    interactive=True,
                    label="Temperature",
                )
            generated_video = gr.Video(
                interactive=False, label="Generated Video", include_audio=True
            )
            generated_command = gr.Markdown()

            btn.click(
                fn=update,
                inputs=[user_files, user_prompt, top_p, temperature, model_choice],
                outputs=[generated_video, generated_command],
            )
        with gr.Row():
            gr.Examples(
                examples=[
                    [
                        ["./examples/ai_talk.wav", "./examples/bg-image.png"],
                        "Use the image as the background with a waveform visualization for the audio positioned in center of the video.",
                        0.7,
                        0.1,
                        (
                            list(MODELS.keys())[1]
                            if len(MODELS) > 1
                            else list(MODELS.keys())[0]
                        ),
                    ],
                    [
                        ["./examples/ai_talk.wav", "./examples/bg-image.png"],
                        "Use the image as the background with a waveform visualization for the audio positioned in center of the video. Make sure the waveform has a max height of 250 pixels.",
                        0.7,
                        0.1,
                        list(MODELS.keys())[0],
                    ],
                    [
                        [
                            "./examples/cat1.jpeg",
                            "./examples/cat2.jpeg",
                            "./examples/cat3.jpeg",
                            "./examples/cat4.jpeg",
                            "./examples/cat5.jpeg",
                            "./examples/cat6.jpeg",
                            "./examples/heat-wave.mp3",
                        ],
                        "နောက်ခံတေးဂီတအဖြစ် အသံဖြင့် cat3 ရုပ်ပုံနှင့် cat4, cat5 ရုပ်ပုံများကို သုံးပါ။ ဗီဒီယိုကြာချိန်ကို အသံကြာချိန်နှင့် ကိုက်ညီအောင်လုပ်ပါ။ cat3 ပုံဖြင့် စပါ။ 10 စက္ကန့်ကြာပြီးနောက် cat4 ပုံကို ပြောင်းပါ။ 20 စက္ကန့်ကြာပြီးနောက် cat5 ပုံကို ပြောင်းပါ။",
                        0.7,
                        0.1,
                        (
                            list(MODELS.keys())[0]
                            if len(MODELS) > 1
                            else list(MODELS.keys())[0]
                        ),
                    ],
                ],
                inputs=[user_files, user_prompt, top_p, temperature, model_choice],
                outputs=[generated_video, generated_command],
                fn=update,
                run_on_click=True,
                cache_examples=False,
            )

        

    def toggle_interface(password):
        if check_password(password):
            return gr.update(visible=False), gr.update(visible=True), "Login successful!"
        else:
            return gr.update(visible=True), gr.update(visible=False), "Invalid password. Please try again."

    login_button.click(
        fn=toggle_interface,
        inputs=password_input,
        outputs=[login_interface, main_interface, login_status],
    )

demo.queue(default_concurrency_limit=200)
demo.launch(show_api=False, ssr_mode=False, share=True, inline=True)