"""
Data loader for Ferrero naming convention mappings
"""

import json
from pathlib import Path
from typing import Optional, List
import difflib


class DataLoader:
    """Load and query mapping data from data.json"""

    def __init__(self, data_json_path: str):
        """
        Initialize data loader

        Args:
            data_json_path: Path to data.json file

        Raises:
            FileNotFoundError: If data.json doesn't exist
            ValueError: If data.json has invalid structure
        """
        self.data_path = Path(data_json_path)
        if not self.data_path.exists():
            raise FileNotFoundError(f"data.json not found at: {data_json_path}")

        self.data = self._load_json()
        self._validate_data_structure()

    def _load_json(self) -> dict:
        """Load JSON data from file"""
        try:
            with open(self.data_path, 'r', encoding='utf-8') as f:
                return json.load(f)
        except json.JSONDecodeError as e:
            raise ValueError(f"Invalid JSON in data.json: {e}")

    def _validate_data_structure(self):
        """Validate that data.json has required structure"""
        required_keys = ['brands', 'countries', 'languages', 'asset_types', 'social_media_versions']
        missing_keys = [key for key in required_keys if key not in self.data]

        if missing_keys:
            raise ValueError(
                f"data.json missing required keys: {', '.join(missing_keys)}"
            )

    def get_brand_name(self, brand_code: str) -> Optional[str]:
        """
        Resolve brand code to brand name

        Args:
            brand_code: Brand code (e.g., 'RAF', 'NUT')

        Returns:
            str: Brand name (e.g., 'RAFFAELLO', 'NUTELLA')
            None: If brand code not found
        """
        return self.data['brands'].get(brand_code.upper())

    def get_country_name(self, country_code: str) -> Optional[str]:
        """
        Resolve country code to country name

        Args:
            country_code: 2-letter country code (e.g., 'GL', 'IT')

        Returns:
            str: Country name (e.g., 'GLOBAL', 'Italy')
            None: If country code not found
        """
        return self.data['countries'].get(country_code.upper())

    def get_language_name(self, language_code: str) -> Optional[str]:
        """
        Resolve language code to language name

        Args:
            language_code: 2-3 letter language code (e.g., 'it', 'en')

        Returns:
            str: Language name (e.g., 'Italian', 'English')
            None: If language code not found
        """
        return self.data['languages'].get(language_code.lower())

    def get_social_media_name(self, social_code: str) -> Optional[str]:
        """
        Resolve social media code to platform name

        Args:
            social_code: 3-letter social code (e.g., 'IGF', 'FBP')

        Returns:
            str: Platform name (e.g., 'IG - Feed', 'FB - Feed')
            None: If social code not found
        """
        return self.data['social_media_versions'].get(social_code.upper())

    def get_asset_type_name(self, asset_code: str) -> Optional[str]:
        """
        Resolve asset type code to asset type name

        Args:
            asset_code: 3-letter asset type code (e.g., 'OLV', 'TVC')

        Returns:
            str: Asset type name (e.g., 'On Line Video', 'TVC')
            None: If asset type not found
        """
        return self.data['asset_types'].get(asset_code.upper())

    def validate_brand_code(self, code: str) -> bool:
        """
        Check if brand code exists

        Args:
            code: Brand code to validate

        Returns:
            bool: True if valid
        """
        return code.upper() in self.data['brands']

    def validate_country_code(self, code: str) -> bool:
        """
        Check if country code exists

        Args:
            code: Country code to validate

        Returns:
            bool: True if valid
        """
        return code.upper() in self.data['countries']

    def validate_language_code(self, code: str) -> bool:
        """
        Check if language code exists

        Args:
            code: Language code to validate

        Returns:
            bool: True if valid
        """
        return code.lower() in self.data['languages']

    def validate_social_code(self, code: str) -> bool:
        """
        Check if social media code exists

        Args:
            code: Social media code to validate

        Returns:
            bool: True if valid
        """
        return code.upper() in self.data['social_media_versions']

    def validate_asset_type(self, code: str) -> bool:
        """
        Check if asset type exists

        Args:
            code: Asset type code to validate

        Returns:
            bool: True if valid
        """
        return code.upper() in self.data['asset_types']

    def get_similar_codes(self, code: str, code_type: str, n: int = 3) -> List[str]:
        """
        Get similar codes for typo suggestions

        Args:
            code: Code to find matches for
            code_type: Type of code ('brand', 'country', 'language', 'social', 'asset')
            n: Number of suggestions to return

        Returns:
            list: List of similar codes
        """
        code_map = {
            'brand': self.data['brands'],
            'country': self.data['countries'],
            'language': self.data['languages'],
            'social': self.data['social_media_versions'],
            'asset': self.data['asset_types'],
        }

        if code_type not in code_map:
            return []

        all_codes = list(code_map[code_type].keys())
        matches = difflib.get_close_matches(code.upper(), all_codes, n=n, cutoff=0.6)

        return matches

    def get_all_brands(self) -> dict:
        """Get all brands as dict"""
        return self.data['brands']

    def get_all_countries(self) -> dict:
        """Get all countries as dict"""
        return self.data['countries']

    def get_all_languages(self) -> dict:
        """Get all languages as dict"""
        return self.data['languages']

    def get_all_social_media(self) -> dict:
        """Get all social media platforms as dict"""
        return self.data['social_media_versions']

    def get_all_asset_types(self) -> dict:
        """Get all asset types as dict"""
        return self.data['asset_types']