from datetime import datetime, timezone
from pathlib import Path

from app.modules.editor.domain.entities import EditableFile
from app.shared.infrastructure.filesystem import read_text, write_text


def detect_format(file_path: Path) -> str:
    suffix = file_path.suffix.lower()
    if suffix == ".csv":
        return "csv"
    elif suffix == ".md":
        return "md"
    elif suffix in (".yaml", ".yml"):
        if "openapi" in file_path.name or "api-contracts" in file_path.name:
            return "openapi"
        return "yaml"
    return "unknown"


def read_file(base_dir: Path, relative_path: str) -> EditableFile:
    full_path = base_dir / relative_path
    content = read_text(full_path)
    stat = full_path.stat()
    return EditableFile(
        path=relative_path,
        format=detect_format(full_path),
        content=content,
        last_modified=datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc),
    )


def write_file(base_dir: Path, relative_path: str, content: str) -> None:
    full_path = base_dir / relative_path
    write_text(full_path, content)