"""
File service implementation - placeholder
"""

from pathlib import Path
from typing import Optional
from .interfaces import FileService
from ..models.transcription import TranscriptionResult
from ..models.translation import TranslationResult
from ..repositories.interfaces import FileRepository

class FileServiceImpl(FileService):
    """Implementation of FileService interface"""
    
    def __init__(self, file_repository: FileRepository, output_base_dir: Path):
        self.file_repository = file_repository
        self.output_base_dir = output_base_dir
    
    async def save_transcription(
        self, 
        transcription: TranscriptionResult, 
        output_dir: Path, 
        filename: str, 
        format: str = "txt"
    ) -> Path:
        """Save transcription to file in specified format"""
        file_path = output_dir / f"{filename}.{format}"
        
        # Generate content based on format
        if format == "txt":
            content = transcription.text
        elif format == "srt":
            content = transcription.to_srt()
        elif format == "vtt":
            content = transcription.to_vtt()
        elif format == "json":
            # For JSON, use save_json_file directly
            await self.file_repository.save_json_file(transcription.to_dict(), file_path)
            return file_path
        else:
            raise ValueError(f"Unsupported format: {format}")
        
        await self.file_repository.save_text_file(content, file_path)
        return file_path
    
    async def save_metadata(
        self, 
        metadata: dict, 
        output_dir: Path, 
        filename: str
    ) -> Path:
        """Save metadata to JSON file - placeholder implementation"""
        file_path = output_dir / f"{filename}_metadata.json"
        await self.file_repository.save_json_file(metadata, file_path)
        return file_path
    
    async def save_timestamps(
        self, 
        transcription: TranscriptionResult, 
        output_dir: Path, 
        filename: str
    ) -> Path:
        """Save timestamped transcription"""
        file_path = output_dir / f"{filename}_timestamps.txt"
        
        content_lines = [f"Timestamps for {filename}", "=" * 50, ""]
        
        if transcription.segments:
            content_lines.append("SEGMENTS:")
            for i, segment in enumerate(transcription.segments, 1):
                start_time = self._format_timestamp(segment.start)
                end_time = self._format_timestamp(segment.end)
                content_lines.append(f"{i:3d}. [{start_time} --> {end_time}] {segment.text}")
            content_lines.append("")
        
        if transcription.words:
            content_lines.append("WORDS:")
            for word in transcription.words:
                start_time = self._format_timestamp(word.start)
                end_time = self._format_timestamp(word.end)
                confidence = f" (conf: {word.confidence:.3f})" if word.confidence else ""
                content_lines.append(f"[{start_time}-{end_time}] {word.word}{confidence}")
        elif not transcription.segments:
            # If no segments or words, show basic info
            content_lines.append(f"Full text duration: {self._format_timestamp(transcription.duration)}")
            content_lines.append(f"Text: {transcription.text}")
        
        content = "\n".join(content_lines)
        await self.file_repository.save_text_file(content, file_path)
        return file_path
    
    def _format_timestamp(self, seconds: float) -> str:
        """Format seconds to HH:MM:SS.mmm format"""
        hours = int(seconds // 3600)
        minutes = int((seconds % 3600) // 60)
        secs = seconds % 60
        return f"{hours:02d}:{minutes:02d}:{secs:06.3f}"
    
    async def create_output_directory(self, base_dir: Path, video_title: Optional[str] = None) -> Path:
        """Create output directory with timestamp - placeholder implementation"""
        from datetime import datetime
        timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
        if video_title:
            dir_name = f"{timestamp}_{video_title}"
        else:
            dir_name = timestamp
        
        output_dir = base_dir / dir_name
        await self.file_repository.create_directory(output_dir)
        return output_dir
    
    async def save_translation(
        self, 
        translation: TranslationResult, 
        output_dir: Path, 
        filename: str, 
        format: str = "txt"
    ) -> Path:
        """Save translation result to file"""
        file_path = output_dir / f"{filename}_translated.{format}"
        
        # Generate content based on format
        if format == "txt":
            content = translation.translated_text
        elif format == "srt":
            content = translation.to_srt()
        elif format == "vtt":
            content = translation.to_vtt()
        elif format == "json":
            # For JSON, use save_json_file directly
            await self.file_repository.save_json_file(translation.to_dict(), file_path)
            return file_path
        else:
            raise ValueError(f"Unsupported format: {format}")
        
        await self.file_repository.save_text_file(content, file_path)
        return file_path