import os
import openai
import gradio as gr
import requests
import datetime
from io import BytesIO
from google.api_core.client_options import ClientOptions
from google.cloud import documentai_v1 as documentai
import json
from google.cloud import vision
import time
from settings import char_remove, gpt_model, RPFAAP2, RPFAAP1, project_id, project_location, processor_id
from tqdm import tqdm
import logging

logging.basicConfig(filename='app.log', level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')

def chat_gpt_image(content, context):
    openai.api_key = os.environ['GPT_API_KEY']
    prompt = "You are an expert at identifying OCR errors and correcting them with the help of context, intuition and logic."
    document = "The following text was scanned using OCR, your goal is to return a corrected version of the text"
    prefix = "Additionally"
    if context == "": 
        sequence = (document, content)
    else: 
        sequence_1 = (prefix, context)
        additional = (" ".join(sequence_1))
        sequence = (additional, content)

    final_content = (" ".join(sequence))
    logging.info(final_content)
    completion = openai.ChatCompletion.create(
    model=gpt_model,
    user="1",
    temperature="0.5",
    messages=[
        {"role": "system", "content": prompt},
        {"role": "user", "content": final_content}
    ]
    )
    logging.info(completion.choices[0].message.content)
    return(completion.choices[0].message.content)

def remove_na(string):
    for char in char_remove:
        string = string.replace(char, "")
    return string

def chat_gpt_document(content, document_type, context):
    openai.api_key = os.environ['GPT_API_KEY']
    prompt = "You are an expert at identifying OCR errors and correcting them with the help of context, intuition and logic."
    document_prefix = "The following text was scanned using OCR, your goal is to extract the important entities from the text and correct them with the help of the restrictions placed in the desired format. Remember to not make any changes on the labels of the desired format, simply extract the text, correct it and return only the desired format. Text:"
    additional_prefix = "Additionally the text"

    content_info = content[0]
    content_name = content[1]
    if document_type == "RPFAA Building P1":
        document = "RPFAAP1.json"
        desired_format = RPFAAP1
    elif document_type == "RPFAA Building P2":
        document = "RPFAAP2.json"
        desired_format = RPFAAP2
    else: 
        document = ""
        desired_format = ""

    if context == "": 
        sequence_1 = (document_prefix, content_info, desired_format)
    else: 
        sequence_1 = (document_prefix, content_info, desired_format, additional_prefix, context)

    content_1 = (" ".join(sequence_1))
    logging.info(content_1)

    completion_1 = openai.ChatCompletion.create(
    model=gpt_model,
    user="1",
    temperature="0.1",
    messages=[
        {"role": "system", "content": prompt},
        {"role": "user", "content": content_1}
    ]
    )
    logging.info(completion_1.choices[0].message.content)
    input_string = remove_na(completion_1.choices[0].message.content)

    with open(document) as f:
        property_info = json.load(f)
    #Adds the name of the file
    property_info["File Name"] = content_name
    #Fills in the information
    for line in input_string.split('\n'):
        if ':' in line:
            key, value = line.split(':', 1)
            key = key.strip()
            for category in property_info:
                if key in property_info[category]:
                    property_info[category][key] = value.strip()
                    break
            else:
                if key == "File Name":
                    property_info[key] = value.strip()
    return json.dumps(property_info, indent=4)

def detect_image(content, lang):
    credentials = json.loads(os.environ['CREDENTIALS'])
    temp_file_path = 'temp_credentials.json'
    with open(temp_file_path, 'w') as file:
        json.dump(credentials, file)
    os.environ['GOOGLE_APPLICATION_CREDENTIALS']=r'temp_credentials.json'
    client = vision.ImageAnnotatorClient()
    buffer = BytesIO()
    content.save(buffer, format="PNG")
    content = buffer.getvalue()
    if lang == "Filpino":
        hints = "tl"
    else:
        hints = "en"
    image = vision.Image(content=content)

    response = client.document_text_detection(image=image, image_context={"language_hints": [hints]})

    if response.error.message:
        raise Exception(
            '{}\nFor more info on error messages, check: '
            'https://cloud.google.com/apis/design/errors'.format(
                response.error.message))
    
    os.remove(temp_file_path)
    return(response.full_text_annotation.text)

def detect_document(content):
    credentials = json.loads(os.environ['CREDENTIALS'])
    temp_file_path = 'temp_credentials.json'
    with open(temp_file_path, 'w') as file:
        json.dump(credentials, file)
    os.environ['GOOGLE_APPLICATION_CREDENTIALS']=r'temp_credentials.json'
    PROJECT_ID = project_id
    LOCATION = project_location  # Format is 'us' or 'eu'
    PROCESSOR_ID = processor_id  # Create processor in Cloud Console
    content_extension = content.name.split(".")[-1]
    
    if content_extension.upper() == "TIFF":
        MIME_TYPE = "image/tiff"
    elif content_extension.upper() =="PDF":
        MIME_TYPE = "application/pdf"
    elif content_extension.upper() =="PNG":
        MIME_TYPE = "image/png"
    elif content_extension.upper() =="JPG":
        MIME_TYPE = "image/jpg"
    else: 
        return("Please upload a valid MIME type")

    docai_client = documentai.DocumentProcessorServiceClient(
        client_options=ClientOptions(api_endpoint=f"{LOCATION}-documentai.googleapis.com")
    )

    RESOURCE_NAME = docai_client.processor_path(PROJECT_ID, LOCATION, PROCESSOR_ID)
    
    with open(content.name, "rb") as image:
        image_content = image.read()

    raw_document = documentai.RawDocument(content=image_content, mime_type=MIME_TYPE)

    request = documentai.ProcessRequest(name=RESOURCE_NAME, raw_document=raw_document)

    result = docai_client.process_document(request=request)

    document_object = result.document

    name = content.name.split('\\')[-1]
    name = name.split("/")[-1]
    name = name.split('.')[0]

    os.remove(temp_file_path)

    return(document_object.text, name)

def image(content, lang, context):
    return chat_gpt_image(detect_image(content, lang), context)

def document(content, document_type, context):
    return chat_gpt_document(detect_document(content),document_type,context)

def batch_document(content, document_type, context, progress=gr.Progress()):
    progress(0, desc="Starting")
    retries = 5
    timeout = 5
    i = 0
    j = 0 
    combined_data = []
    for x in progress.tqdm(content, desc="Processing"):
        while True: 
            try: 
                data = json.loads(chat_gpt_document(detect_document(x),document_type,context))
                combined_data.append(data)
                break
            except Exception as e:
                logging.error(f'Retry {i+1} failed: ', e)
                if i < retries - 1:
                    logging.error(f'Retrying in {timeout} seconds...')
                    time.sleep(timeout)
                    i += 1
            # except openai.error.RateLimitError:
            #     logging.error(f'Retry {j+1} failed: openai.error.RateLimitError')
            #     if j < retries - 1:
            #         logging.error(f'Retrying in {timeout} seconds...')
            #         time.sleep(timeout)
            #         j += 1
    logging.info(combined_data)
    return save_json(combined_data, document_type)

def save_json(text, filename):
    filename = filename+".json"
    with open(filename, "w", encoding='utf-8') as outfile:
        json.dump(text, outfile)
    return filename

with gr.Blocks(title="Ottico OCR", css=".markdown {text-align: center;}", theme='freddyaboulton/dracula_revamped') as app:
    gr.Markdown("""# Ottico OCR
    Attach Images or Files below and convert them to Text.""", elem_classes="markdown")
    with gr.Tab("Scan Image"):
        with gr.Row():
            with gr.Column():
                image_input = [gr.Image(type="pil"),
                    gr.Radio(["English", "Filipino"], label="Language", info="What is the document language? (Optional)"),
                    gr.Textbox(label="What kind of Image is this? (Optional)", placeholder="This is an image of an Official Reciept")]
            image_output = gr.Textbox(label="Result")
        image_button = gr.Button("Scan")
    with gr.Tab("Scan Document"):
        with gr.Row():
            with gr.Column():
                document_input = [gr.File(file_types=["pdf","tiff","image","text"]),
                    gr.Dropdown(["RPFAA Building P1", "RPFAA Building P2"], label="File Type", info="What type of document is this?"),
                    gr.Textbox(label="Any additional information? (Optional)", placeholder="This is document is an Official Reciept")]
            document_output = gr.Textbox(label="Result")
        document_button = gr.Button("Scan")
    with gr.Tab("Batch Scan"):
        with gr.Row():
            with gr.Column():
                batch_document_input = [gr.File(file_types=["pdf","tiff","image","text"], file_count="multiple"),
                    gr.Dropdown(["RPFAA Building P1", "RPFAA Building P2"], label="File Type", info="What type of document is this?"),
                    gr.Textbox(label="Any additional information? (Optional)", placeholder="This is document is an Official Reciept")]
            batch_document_output = gr.File(label="Result")
        batch_document_button = gr.Button("Scan")
         
    
    image_button.click(image, inputs=image_input, outputs=image_output)
    document_button.click(document, inputs=document_input, outputs=document_output)
    batch_document_button.click(batch_document, inputs=batch_document_input, outputs=batch_document_output)

app.queue()
app.launch(auth=("username", "password"))