import os
import glob
from flask import render_template, Blueprint, current_app, request

from app.tasks import get_redis

from app.forms import ScrapingForm
from app.util import get_size
from app.config import load_config
from app.api import scraper as scraper

from app.analysis import load_data, load_analysis_modules

from datetime import datetime

views_bp = Blueprint("views", __name__)

def sizeof_fmt(num, suffix="B"):
    """Convert bytes to human readable format"""
    for unit in ["", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"]:
        if abs(num) < 1024.0:
            return f"{num:3.1f} {unit}{suffix}"
        num /= 1024.0
    return f"{num:.1f} Yi{suffix}"

def register_views(app):
    @app.route('/')
    def index():
        form = ScrapingForm()
        return render_template('index.html', form=form)
    
    @app.route('/results')
    def results():
        return render_template('results.html')

    @app.route('/log_viewer')
    def log_viewer():
        return render_template('log_viewer.html')
    
    @app.route('/download_results')
    def download_results():
        # Get the current active log file and data file from Redis and app config
        redis_client = get_redis()
        current_faction_id = redis_client.get("current_faction_id")
        
        active_data_file = None
        if current_faction_id:
            active_data_file = redis_client.hget(f"scraper:{current_faction_id}", "data_file_name")
        
        active_log_file = app.config['LOG_FILE_NAME']

        def get_file_info(file_path, file_type='data'):
            stats = os.stat(file_path)
            name = os.path.basename(file_path)
            
            # Determine if file is active
            is_active = False
            if file_type == 'data' and active_data_file:
                is_active = os.path.abspath(file_path) == os.path.abspath(active_data_file)
            elif file_type == 'log' and active_log_file:
                is_active = os.path.basename(file_path) == os.path.basename(active_log_file)

            return {
                'name': file_path,  # Full path for internal use
                'name_display': name,  # Just filename for display
                'last_modified': stats.st_mtime,  # Send timestamp instead of datetime
                'created': stats.st_ctime,        # Send timestamp instead of datetime
                'size': sizeof_fmt(stats.st_size),
                'active': is_active
            }

        data_files = []
        log_files = []

        # Get data files
        data_dir = os.path.abspath(app.config['DATA']['DATA_DIR'])
        if os.path.exists(data_dir):
            for file in glob.glob(os.path.join(data_dir, "*.csv")):
                data_files.append(get_file_info(file, 'data'))

        # Get log files
        log_dir = os.path.abspath(app.config['LOGGING']['LOG_DIR'])
        if os.path.exists(log_dir):
            for file in glob.glob(os.path.join(log_dir, "*.log")):
                log_files.append(get_file_info(file, 'log'))

        # Sort files by modification time, newest first
        data_files.sort(key=lambda x: x['last_modified'], reverse=True)
        log_files.sort(key=lambda x: x['last_modified'], reverse=True)

        files = {
            'data': data_files,
            'log': log_files
        }

        return render_template('download_results.html', files=files)
    
    views_bp = Blueprint("views", __name__)

    @views_bp.route("/analyze", methods=["GET", "POST"])
    def analyze():
        analysis_modules = load_analysis_modules()  # Load available analyses
        data_dir = current_app.config.get("DATA", {}).get("DATA_DIR")
        
        selected_file = None
        selected_analyses = []
        
        # Find all available CSV files
        data_files = sorted(
            glob.glob(os.path.join(data_dir, "*.csv")), 
            key=os.path.getmtime, 
            reverse=True
        ) if data_dir else []

        context = {
            "data_files": data_files,
            "analyses": analysis_modules,
            "selected_file": selected_file,
            "selected_analyses": selected_analyses
        }

        if request.method == "POST":
            selected_analyses = request.form.getlist("analyses")
            selected_file = request.form.get("data_file")

            if not selected_file:
                context["error"] = "No file selected."
                return render_template("analyze.html", **context)

            df = load_data(selected_file)
            results = {}

            for analysis in analysis_modules:
                if analysis.name in selected_analyses:
                    results[analysis.name] = analysis.execute(df)  # Some may return HTML

            context["results"] = results

        return render_template("analyze.html", **context)

    @views_bp.route('/server_time')
    def server_time():
        current_time = datetime.now(datetime.timezone.utc).strftime('%Y-%m-%d %H:%M:%S')
        return {'server_time': current_time}
    
    app.register_blueprint(views_bp)