"""Feedback storage service"""
import os
import shutil
from flask import current_app
from app.models.feedback import Feedback
from app.utils.file_validator import get_safe_filename


class FeedbackStorageService:
    """Service for storing feedback to filesystem"""

    @staticmethod
    def create_feedback(product_id, content_text=None, files=None):
        """Create new feedback entry

        Args:
            product_id: Product ID
            content_text: Feedback text content (optional)
            files: List of uploaded files (optional)

        Returns:
            Feedback: Created feedback instance
        """
        # Generate unique feedback ID
        feedback_id = Feedback.generate_id()

        # Create content preview (first 200 chars)
        content_preview = ''
        if content_text:
            content_preview = content_text[:200]

        # Check attachments
        has_attachments = bool(files and len(files) > 0)
        attachment_count = len(files) if files else 0

        # Create feedback instance
        feedback = Feedback(
            feedback_id=feedback_id,
            product_id=product_id,
            status='new',
            content_preview=content_preview,
            has_attachments=has_attachments,
            attachment_count=attachment_count
        )

        # Create directory structure
        feedback_dir = Feedback._get_feedback_dir(product_id, feedback_id)
        os.makedirs(feedback_dir, exist_ok=True)

        return feedback

    @staticmethod
    def save_metadata(feedback):
        """Save feedback metadata to YAML file

        Args:
            feedback: Feedback instance to save
        """
        feedback.save_metadata()

    @staticmethod
    def save_content(feedback, content_text):
        """Save feedback content to text file

        Args:
            feedback: Feedback instance
            content_text: Feedback text content
        """
        if not content_text:
            return

        content_file = Feedback._get_content_file(feedback.product_id, feedback.feedback_id)

        with open(content_file, 'w', encoding='utf-8') as f:
            f.write(content_text)

    @staticmethod
    def save_attachments(feedback, files):
        """Save attachment files

        Args:
            feedback: Feedback instance
            files: List of Werkzeug FileStorage objects

        Returns:
            list: List of saved filenames
        """
        if not files:
            return []

        attachments_dir = Feedback._get_attachments_dir(feedback.product_id, feedback.feedback_id)
        os.makedirs(attachments_dir, exist_ok=True)

        saved_files = []

        for file in files:
            if not file or file.filename == '':
                continue

            # Sanitize filename
            safe_filename = get_safe_filename(file.filename)

            # Save file
            file_path = os.path.join(attachments_dir, safe_filename)
            file.save(file_path)

            saved_files.append(safe_filename)

        return saved_files

    @staticmethod
    def save_complete_feedback(product_id, content_text=None, files=None):
        """Create and save complete feedback submission

        Args:
            product_id: Product ID
            content_text: Feedback text content (optional)
            files: List of uploaded files (optional)

        Returns:
            Feedback: Created and saved feedback instance
        """
        # Create feedback
        feedback = FeedbackStorageService.create_feedback(product_id, content_text, files)

        # Save content
        if content_text:
            FeedbackStorageService.save_content(feedback, content_text)

        # Save attachments
        if files:
            FeedbackStorageService.save_attachments(feedback, files)

        # Save metadata
        FeedbackStorageService.save_metadata(feedback)

        return feedback

    @staticmethod
    def update_feedback_status(feedback, new_status):
        """Update feedback status

        Args:
            feedback: Feedback instance
            new_status: New status value

        Returns:
            bool: True if updated successfully, False otherwise
        """
        if new_status not in Feedback.VALID_STATUSES:
            return False

        feedback.status = new_status
        feedback.save_metadata()

        return True

    @staticmethod
    def delete_feedback(feedback):
        """Delete feedback and all associated files

        Args:
            feedback: Feedback instance to delete
        """
        feedback_dir = Feedback._get_feedback_dir(feedback.product_id, feedback.feedback_id)

        if os.path.exists(feedback_dir):
            shutil.rmtree(feedback_dir)