from flask import Blueprint, render_template, request, current_app, redirect, url_for, abort, flash
import os
from app.utils.file_handler import save_file, read_markdown_file, get_file_by_uri, load_uri_map

main_bp = Blueprint('main', __name__)

@main_bp.route('/', methods=['GET'])
def index():
    # List all available documents
    uri_map = load_uri_map()
    documents = [{'uri': uri, 'filename': info['filename']} for uri, info in uri_map.items()]
    return render_template('index.html', documents=documents)

@main_bp.route('/upload', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        if 'file' not in request.files:
            flash('No file part')
            return redirect(request.url)
            
        file = request.files['file']
        
        if file.filename == '':
            flash('No file selected')
            return redirect(request.url)
            
        if file and file.filename.endswith('.md'):
            custom_uri = request.form.get('custom_uri', '').strip()
            uri, filename = save_file(file, custom_uri if custom_uri else None)
            return redirect(url_for('main.view_file', uri=uri))
        else:
            flash('Only markdown files are allowed')
            
    return render_template('upload.html')

@main_bp.route('/view/<uri>')
def view_file(uri):
    file_info = get_file_by_uri(uri)
    
    if not file_info:
        abort(404)
    
    html_content = read_markdown_file(file_info['path'])
    return render_template('viewer.html', 
                          filename=file_info['filename'], 
                          content=html_content,
                          uri=uri)