from helsinki_models import helsinki_models, get_clearly_formatted_langauge_directions
from iso639_wrapper import get_name_from_iso_code
from language_detection import detect_language
from collections import OrderedDict
from utils import convert_keys_to_lowercase


def get_all_source_languages():
    """
    Returns a human-readable `dict of source languages names to codes` 
    based on the available models.
    """
    source_languages = {}
    language_directions = get_clearly_formatted_langauge_directions()

    for direction in language_directions:
        source_lang_code = direction.split('-')[0]
        source_language_name = get_name_from_iso_code(source_lang_code)
        if source_language_name:
            source_languages[source_language_name] = source_lang_code
    source_languages = OrderedDict(sorted(source_languages.items()))
    all_source_langs_including_auto_detect = \
        { **{'Auto Detect' : 'Auto Detect'}, **source_languages}
    return all_source_langs_including_auto_detect

def get_target_languages(source_language_code, input_text=None):
    """
    Returns a human-readable `dict of target languages names to codes` 
    based on the available models and the source language passed.
    """
    include_all_languages = False
    if source_language_code == "Auto Detect":
        source_language_code, include_all_languages = auto_detect_language_code(input_text)
        
    target_languages = {}
    language_directions = get_clearly_formatted_langauge_directions()
    for direction in language_directions:
        if direction.startswith(f"{source_language_code}-") or include_all_languages:
            target_language = direction.split('-')[1]  # Extracting the last part as the target language
            target_language_name = get_name_from_iso_code(target_language)
            if target_language_name:
                target_languages[target_language_name] = target_language
    return OrderedDict(sorted(target_languages.items()))

def auto_detect_language_code(input_text):
    if not input_text:
        return None, True
    language = detect_language(input_text)
    if language == "unknown":
        print("unknown tesxt for ", input_text)
        return "unknown", True
    elif language in list(get_all_source_languages().keys())\
        or language.lower() in [k.lower() for k in list(get_all_source_languages().keys())]:
        source_languages_dict = convert_keys_to_lowercase(get_all_source_languages())
        source_language_code = source_languages_dict.get(language.lower())
        return source_language_code, False
    elif language in list(get_all_source_languages().values())\
        or language.lower() in [k.lower() for k in list(get_all_source_languages().values())]:
        source_language_code = language
        return source_language_code, False
    else:
        raise ValueError(f"Language {source_language_code} not supported")
    

# Example usage:
# all_source_languages = get_all_source_languages()
# print("All Source Languages:", all_source_languages)

# source_language_code = "pa"  # Replace with your desired source language
# target_languages = get_target_languages(source_language_code)
# print(f"Target Languages for {source_language_code}:", target_languages)