from typing import Dict, List, Optional
from fastapi import APIRouter, Header
from pydantic import BaseModel

class LanguageStrings(BaseModel):
    validation: Dict[str, Dict[str, str]]  # validation.required.field: {tr: "...", en: "..."}
    messages: Dict[str, Dict[str, str]]    # messages.welcome: {tr: "...", en: "..."}
    labels: Dict[str, Dict[str, str]]      # labels.submit_button: {tr: "...", en: "..."}

class LanguageService:
    def __init__(self):
        self.strings: Dict[str, Dict[str, Dict[str, str]]] = {
            "validation": {
                "required": {
                    "tr": "Bu alan zorunludur",
                    "en": "This field is required"
                },
                "email": {
                    "tr": "Geçerli bir e-posta adresi giriniz",
                    "en": "Please enter a valid email"
                },
                "min_length": {
                    "tr": "En az {min} karakter giriniz",
                    "en": "Enter at least {min} characters"
                },
                # Add more validation messages
            },
            "messages": {
                "welcome": {
                    "tr": "Hoş geldiniz",
                    "en": "Welcome"
                },
                "success": {
                    "tr": "İşlem başarılı",
                    "en": "Operation successful"
                },
                # Add more messages
            },
            "labels": {
                "submit": {
                    "tr": "Gönder",
                    "en": "Submit"
                },
                "cancel": {
                    "tr": "İptal",
                    "en": "Cancel"
                },
                # Add more labels
            }
        }

    def get_strings(self, lang: str = "tr") -> LanguageStrings:
        """Get all strings for a specific language"""
        return LanguageStrings(
            validation={k: v[lang] for k, v in self.strings["validation"].items()},
            messages={k: v[lang] for k, v in self.strings["messages"].items()},
            labels={k: v[lang] for k, v in self.strings["labels"].items()}
        )

# Create FastAPI router
router = APIRouter(prefix="/api/language", tags=["Language"])
language_service = LanguageService()

@router.get("/strings")
async def get_language_strings(
    accept_language: Optional[str] = Header(default="tr")
) -> LanguageStrings:
    """Get all language strings based on Accept-Language header"""
    lang = accept_language.split(",")[0][:2]  # Get primary language code
    return language_service.get_strings(lang if lang in ["tr", "en"] else "tr")