import gradio as gr
import uuid
from app_utils import (
    LANG_CODES, client, save_to_db, fetch_user_sessions
)


def generate_written_feedback(text, language):
    prompt = f"""You are a writing tutor. Please respond in [language={language}].
Evaluate the user's writing on the following 6 criteria:
1. Clarity & Conciseness
2. Organization & Flow
3. Grammar & Mechanics
4. Vocabulary & Style
5. Tone Appropriateness
6. Originality & Creativity

For each:
- Give a score out of 10
- Write a short explanation

Then provide:
- An overall summary
- One motivational closing line

Writing:
{text}
"""
    response = client.chat.completions.create(
        model="gpt-4",
        messages=[
            {"role": "system", "content": f"You are a supportive writing coach responding in {language}."},
            {"role": "user", "content": prompt}
        ],
        temperature=0.7
    )
    return response.choices[0].message.content


def improve_written_text(text, language):
    prompt = f"""You are a writing coach. Rewrite this piece to improve structure, grammar, and clarity.
Make it more compelling while keeping the original meaning.

Text:
{text}
"""
    response = client.chat.completions.create(
        model="gpt-4",
        messages=[
            {"role": "system", "content": f"Reply in {language}. Provide only the improved version."},
            {"role": "user", "content": prompt}
        ]
    )
    return response.choices[0].message.content


def written_dashboard():
    with gr.Column() as written_panel:
        gr.Markdown("""
        <div id=\"header\" style=\"text-align: center;\">
            <img src=\"file/images/chatter_owl.png\" width=\"120\">
            <h2>✍️ Written Communication with <strong>Chatter the Owl</strong></h2>
            <p>Paste your writing or upload a file, select language, and I’ll help you sharpen your message.</p>
        </div>
        """)

        nickname_box = gr.Textbox(label="👤 Your Nickname", placeholder="Enter your name…")
        language_dropdown = gr.Dropdown(label="🌍 Select Language", choices=list(LANG_CODES.keys()), value="English")
        font_size_slider = gr.Slider(12, 24, value=16, step=1, label="🔠 Font Size")
        contrast_toggle = gr.Checkbox(label="🌓 High Contrast Text")

        with gr.Row():
            input_text = gr.Textbox(lines=7, label="📝 Your Writing", elem_id="input_text", elem_classes=["text_area"])
            file_input = gr.File(label="📄 Upload Text File", file_types=[".txt", ".md"]) 

        feedback_box = gr.Textbox(label="💡 Feedback", interactive=False, elem_id="feedback_box")
        improved_box = gr.Textbox(label="🎯 Improved Version", interactive=False, elem_id="improved_box")
        history_table = gr.Dataframe(headers=["🕒 Timestamp", "🌐 Language", "✍️ Writing Preview", "📋 Feedback Preview"])

        def extract_text(file):
            if file is None:
                return ""
            with open(file.name, 'r', encoding='utf-8') as f:
                return f.read()

        file_input.change(fn=extract_text, inputs=file_input, outputs=input_text)

        def tutor_written(text, language, nickname):
            if not text.strip():
                return "", "", []

            feedback = generate_written_feedback(text, language)
            improved = improve_written_text(text, language)

            save_to_db(nickname, text, feedback, language)
            sessions = fetch_user_sessions(nickname)
            session_table = [[s.timestamp, s.language, s.transcript[:40], s.feedback[:40]] for s in sessions]

            return feedback, improved, session_table

        input_text.change(
            fn=tutor_written,
            inputs=[input_text, language_dropdown, nickname_box],
            outputs=[feedback_box, improved_box, history_table]
        )

        def update_styles(font_size, high_contrast):
            # Dummy update to trigger refresh, can't update style directly in gr.update
            return "", "", ""

        font_size_slider.change(update_styles, [font_size_slider, contrast_toggle], [input_text, feedback_box, improved_box])
        contrast_toggle.change(update_styles, [font_size_slider, contrast_toggle], [input_text, feedback_box, improved_box])

        return written_panel