from __future__ import annotations

from pathlib import Path
from typing import Iterator

from .constants import MUSIC_EXTENSIONS
from .db import connect
from .hashing import fast_hash
from .metadata import read_metadata


def iter_music(root: Path) -> Iterator[Path]:
    for path in root.rglob("*"):
        if not path.is_file() or path.is_symlink() or path.name.startswith(".") or ".dedupe" in path.parts:
            continue
        if path.suffix.lower() in MUSIC_EXTENSIONS:
            yield path


def index_file(conn, path: Path) -> None:
    st = path.stat()
    fh = fast_hash(path)
    meta = read_metadata(path)
    flags = ",".join(meta.get("version_flags", []))
    conn.execute("""
        INSERT INTO audio_tracks(file_path,file_size,fast_hash,duration,artist,title,album,format,bitrate,sample_rate,bit_depth,version_flags,inode,device,status)
        VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,'active')
        ON CONFLICT(file_path) DO UPDATE SET file_size=excluded.file_size, fast_hash=excluded.fast_hash,
          duration=excluded.duration,artist=excluded.artist,title=excluded.title,album=excluded.album,format=excluded.format,
          bitrate=excluded.bitrate,sample_rate=excluded.sample_rate,bit_depth=excluded.bit_depth,version_flags=excluded.version_flags,
          inode=excluded.inode,device=excluded.device,updated_at=CURRENT_TIMESTAMP,status='active'
    """, (str(path),st.st_size,fh,meta.get("duration"),meta.get("artist"),meta.get("title"),meta.get("album"),meta.get("format"),meta.get("bitrate"),meta.get("sample_rate"),meta.get("bit_depth"),flags,st.st_ino,st.st_dev))


def scan(root: Path, db_path: Path) -> int:
    count = 0
    with connect(db_path) as conn:
        for path in iter_music(root):
            index_file(conn, path); count += 1
    return count