"""
Progress management for SkillSync
"""

import json
import os
from datetime import datetime

class ProgressManager:
    """Manages user progress and submissions"""
    
    def __init__(self):
        self.progress_file = "data/user_data/progress.json"
        self.progress = self.load_progress()
    
    def load_progress(self):
        """Load progress from file"""
        try:
            if os.path.exists(self.progress_file):
                with open(self.progress_file, 'r') as f:
                    return json.load(f)
        except Exception as e:
            print(f"Error loading progress: {e}")
        
        return {
            "completed_lessons": {},
            "quiz_scores": {},
            "assignment_submissions": {},
            "capstone_submitted": False,
            "capstone_details": {},
            "last_accessed": None
        }
    
    def save_progress(self):
        """Save progress to file"""
        try:
            os.makedirs(os.path.dirname(self.progress_file), exist_ok=True)
            self.progress["last_accessed"] = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            with open(self.progress_file, 'w') as f:
                json.dump(self.progress, f, indent=2)
            return True
        except Exception as e:
            print(f"Error saving progress: {e}")
            return False
    
    def get_completed_lessons(self, module_id):
        """Get list of completed lesson IDs for a module"""
        return self.progress["completed_lessons"].get(str(module_id), [])
    
    def get_total_completed(self):
        """Get total number of completed lessons"""
        return sum(len(lessons) for lessons in self.progress["completed_lessons"].values())
    
    def mark_lesson_complete(self, module_id, lesson_id):
        """Mark a lesson as complete"""
        module_key = str(module_id)
        if module_key not in self.progress["completed_lessons"]:
            self.progress["completed_lessons"][module_key] = []
        if lesson_id not in self.progress["completed_lessons"][module_key]:
            self.progress["completed_lessons"][module_key].append(lesson_id)
            self.save_progress()
            return True
        return False
    
    def save_quiz_score(self, module_id, score):
        """Save quiz score for a module"""
        self.progress["quiz_scores"][str(module_id)] = {
            "score": score,
            "date": datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        }
        self.save_progress()
        return True
    
    def get_quiz_score(self, module_id):
        """Get quiz score for a module"""
        score_data = self.progress["quiz_scores"].get(str(module_id), {})
        return score_data.get("score", 0)
    
    def get_quizzes_passed(self, passing_score=80):
        """Get number of quizzes passed"""
        return sum(
            1 for score_data in self.progress["quiz_scores"].values() 
            if score_data.get("score", 0) >= passing_score
        )
    
    def save_assignment_submission(self, module_id, submission_data):
        """Save assignment submission"""
        module_key = str(module_id)
        if module_key not in self.progress["assignment_submissions"]:
            self.progress["assignment_submissions"][module_key] = []
        submission_data["submitted_at"] = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        self.progress["assignment_submissions"][module_key].append(submission_data)
        self.save_progress()
        return True
    
    def submit_capstone(self, title, description, url, file):
        """Submit capstone project"""
        if not title or not description:
            return False, "Title and description are required"
        self.progress["capstone_submitted"] = True
        self.progress["capstone_details"] = {
            "title": title,
            "description": description,
            "url": url or "",
            "submitted_at": datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        }
        self.save_progress()
        return True, "Capstone submitted successfully"
    
    def get_overall_progress(self, total_lessons=25):
        """Calculate overall course progress"""
        completed = self.get_total_completed()
        return {
            "total_lessons": total_lessons,
            "completed_lessons": completed,
            "percentage": int((completed / total_lessons) * 100) if total_lessons > 0 else 0,
            "quizzes_passed": self.get_quizzes_passed(),
            "capstone_submitted": self.progress.get("capstone_submitted", False)
        }