import os
import csv
import re
import time
import sys
import random
import asyncio
import logging
import traceback
import requests
from music_tag import load_file
from rich.console import Console
from rich.table import Table
from rich.progress import Progress, BarColumn, TextColumn, TimeElapsedColumn, TaskProgressColumn
sys.path.insert(0, "..")
from utils.sr_wrapper import SRUtil
from rapidfuzz import fuzz


# Helper to strip common parenthetical tags from album names
def strip_album_tags(album):
    """Remove common parenthetical tags from the end of album names."""
    pattern = r"\s*\((deluxe|remaster(ed)?|original mix|expanded|bonus|edition|version|mono|stereo|explicit|clean|anniversary|special|reissue|expanded edition|bonus track(s)?|international|digital|single|ep|live|instrumental|karaoke|radio edit|explicit version|clean version|acoustic|demo|re-recorded|remix|mix|edit|feat\.?|featuring|with .+|from .+|soundtrack|ost|score|session|vol(ume)? ?\d+|disc ?\d+|cd ?\d+|lp ?\d+|vinyl|202[0-9]|20[0-1][0-9]|19[0-9][0-9])\)$"
    return re.sub(pattern, "", album, flags=re.IGNORECASE).strip()

# Helper to strip common trailing tags like EP, LP, Single, Album, etc. from album names
def strip_album_suffix(album):
    # Remove trailing tags like ' EP', ' LP', ' Single', ' Album', ' Remix', ' Version', etc.
    # Only if they appear at the end, case-insensitive, with or without punctuation
    suffix_pattern = r"[\s\-_:]*(ep|lp|single|album|remix|version|edit|mix|deluxe|expanded|anniversary|reissue|instrumental|karaoke|ost|score|session|mono|stereo|explicit|clean|bonus|disc ?\d+|cd ?\d+|vinyl|202[0-9]|20[0-1][0-9]|19[0-9][0-9])$"
    return re.sub(suffix_pattern, "", album, flags=re.IGNORECASE).strip()
# iTunes/Apple Music API fallback
def search_itunes_cover(artist, album):
    """Search iTunes/Apple Music public API for album art."""
    import urllib.parse
    base_url = "https://itunes.apple.com/search"
    params = {
        "term": f"{artist} {album}",
        "entity": "album",
        "limit": 1,
        "media": "music"
    }
    url = f"{base_url}?{urllib.parse.urlencode(params)}"
    try:
        resp = requests.get(url, timeout=10)
        if resp.status_code != 200:
            return None
        data = resp.json()
        if data.get("resultCount", 0) == 0:
            return None
        result = data["results"][0]
        # Use the highest-res artwork available
        art_url = result.get("artworkUrl100")
        if art_url:
            art_url = art_url.replace("100x100bb", "600x600bb")
            img_resp = requests.get(art_url)
            if img_resp.status_code == 200:
                return img_resp.content
    except Exception:
        traceback.format_exc()
        pass
    return None


# Fuzzy match helper for metadata
def is_fuzzy_match(expected, actual, threshold=80):
    if not expected or not actual:
        return False
    return fuzz.token_set_ratio(expected.lower(), actual.lower()) >= threshold

# Fuzzy match for all fields
def is_metadata_match(expected_artist, expected_album, expected_title, found_artist, found_album, found_title, threshold=80):
    artist_match = is_fuzzy_match(expected_artist, found_artist, threshold)
    album_match = is_fuzzy_match(expected_album, found_album, threshold) if expected_album else True
    title_match = is_fuzzy_match(expected_title, found_title, threshold)
    return artist_match and album_match and title_match

# Utility to normalize artist/song names for searching
def normalize_name(name):
    # Lowercase, strip, remove extra spaces, and remove common punctuation
    name = name.lower().strip()
    name = re.sub(r"\([0-9]\)$", "", name)  # remove (1), (2), etc. at end
    name = re.sub(r"[\s_]+", " ", name)
    name = re.sub(r"[\(\)\[\]\{\}\'\"\!\?\.,:;`~@#$%^&*+=|\\/<>]", "", name)
    return name

# Suppress noisy loggers (aiohttp, urllib3, etc.)
for noisy_logger in [
    "aiohttp.client",
    "aiohttp.server",
    "aiohttp.access",
    "urllib3",
    "asyncio",
    "chardet",
    "requests.packages.urllib3",
]:
    logging.getLogger(noisy_logger).setLevel(logging.CRITICAL)
    logging.getLogger(noisy_logger).propagate = False

# Also suppress root logger to CRITICAL for anything not our own
logging.getLogger().setLevel(logging.CRITICAL)


# Directory to scan
MUSIC_DIR = "/storage/music2/completed/FLAC/review"
REPORT_CSV = "cover_art_report.csv"
AUDIO_EXTS = {".flac", ".mp3", ".m4a"}

console = Console()

# MusicBrainz API helpers

# Limit concurrent MusicBrainz requests
MUSICBRAINZ_SEMAPHORE = asyncio.Semaphore(1)

def search_musicbrainz_cover(artist, album, max_retries=4):
    url = f"https://musicbrainz.org/ws/2/release-group/?query=artist:{artist} AND release:{album}&fmt=json"
    headers = {"User-Agent": "cover-art-script/1.0"}
    delay = 1.5
    for attempt in range(1, max_retries + 1):
        # Limit concurrency
        loop = asyncio.get_event_loop()
        if MUSICBRAINZ_SEMAPHORE.locked():
            loop.run_until_complete(MUSICBRAINZ_SEMAPHORE.acquire())
        else:
            MUSICBRAINZ_SEMAPHORE.acquire()
        try:
            resp = requests.get(url, headers=headers)
            if resp.status_code == 503:
                console.print(f"[yellow]MusicBrainz 503 error, retrying (attempt {attempt})...[/yellow]")
                time.sleep(delay + random.uniform(0, 0.5))
                delay *= 2
                continue
            if resp.status_code != 200:
                console.print(f"[red]MusicBrainz API error: {resp.status_code}[/red]")
                return None
            try:
                data = resp.json()
            except Exception as e:
                console.print(f"[red]MusicBrainz API returned invalid JSON for {artist} - {album}: {e}[/red]")
                return None
            if not data.get("release-groups"):
                console.print(f"[red]No release-groups found for {artist} - {album}[/red]")
                return None
            rgid = data["release-groups"][0]["id"]
            caa_url = f"https://coverartarchive.org/release-group/{rgid}/front-500"
            caa_resp = requests.get(caa_url)
            if caa_resp.status_code == 200:
                console.print(f"[green]Found cover art on Cover Art Archive for {artist} - {album}[/green]")
                return caa_resp.content
            console.print(f"[red]No cover art found on Cover Art Archive for {artist} - {album}[/red]")
            return None
        finally:
            try:
                MUSICBRAINZ_SEMAPHORE.release()
            except Exception:
                pass
    console.print(f"[red]MusicBrainz API failed after {max_retries} attempts for {artist} - {album}[/red]")
    return None

async def fetch_srutil_cover(sr, artist, song):
    try:
        album = await sr.get_album_by_name(artist, song)
        if not album or not album.get('id'):
            return None
        cover_url = await sr.get_cover_by_album_id(album['id'], 640)
        if cover_url:
            resp = requests.get(cover_url)
            if resp.status_code == 200:
                return resp.content
            else:
                console.print(f"[red]SRUtil: Failed to fetch cover art from URL (status {resp.status_code}): {cover_url}[/red]")
    except Exception as e:
        msg = str(e)
        if "Cannot combine AUTHORIZATION header with AUTH argument" in msg:
            console.print("[red]SRUtil: Skipping due to conflicting authentication method in dependency (AUTHORIZATION header + AUTH argument).[/red]")
        else:
            console.print(f"[red]SRUtil: Exception: {e}[/red]")
    return None

def has_cover(file):
    try:
        f = load_file(file)
        has = bool(f['artwork'].first)
        return has
    except Exception as e:
        console.print(f"[red]Error checking cover art for {file}: {e}[/red]")
        return False

def embed_cover(file, image_bytes):
    try:
        f = load_file(file)
        f['artwork'] = image_bytes
        f.save()
        return True
    except Exception as e:
        console.print(f"[red]Failed to embed cover art into {file}: {e}[/red]")
        return False

def get_artist_album_title(file):
    try:
        f = load_file(file)
        artist = f['artist'].value or ""
        album = f['album'].value or ""
        title = f['title'].value or os.path.splitext(os.path.basename(file))[0]
        return artist, album, title
    except Exception as e:
        console.print(f"[red]Error reading tags for {file}: {e}[/red]")
        return "", "", os.path.splitext(os.path.basename(file))[0]


# Concurrency limit for async processing
CONCURRENCY = 12

async def process_file(file, sr, table, results, sem):
    async with sem:
        if has_cover(file):
            table.add_row(file, "Already Present", "-")
            results.append([file, "Already Present", "-"])
            return
        artist, album, title = get_artist_album_title(file)
        # Use a global or passed-in cache dict for album art
        if not hasattr(process_file, "album_art_cache"):
            process_file.album_art_cache = {}
        album_key = (artist, album)
        image_bytes = process_file.album_art_cache.get(album_key)
        source = "SRUtil"
        if image_bytes is None:
            image_bytes = await fetch_srutil_cover(sr, artist, album)
            if image_bytes:
                process_file.album_art_cache[album_key] = image_bytes
        if not image_bytes:
            image_bytes = search_musicbrainz_cover(normalize_name(artist), normalize_name(album))
            source = "MusicBrainz"
            if image_bytes:
                process_file.album_art_cache[album_key] = image_bytes
        if not image_bytes:
            image_bytes = search_itunes_cover(artist, album)
            source = "iTunes"
            if image_bytes:
                process_file.album_art_cache[album_key] = image_bytes
        # If all lookups failed, try with parenthetical tag stripped
        if not image_bytes and re.search(r"\([^)]*\)$", album):
            cleaned_album = strip_album_tags(album)
            if cleaned_album and cleaned_album != album:
                cleaned_key = (artist, cleaned_album)
                image_bytes = process_file.album_art_cache.get(cleaned_key)
                if image_bytes is None:
                    image_bytes = await fetch_srutil_cover(sr, artist, cleaned_album)
                    if image_bytes:
                        process_file.album_art_cache[cleaned_key] = image_bytes
                if not image_bytes:
                    image_bytes = search_musicbrainz_cover(normalize_name(artist), normalize_name(cleaned_album))
                    source = "MusicBrainz (stripped)"
                    if image_bytes:
                        process_file.album_art_cache[cleaned_key] = image_bytes
                if not image_bytes:
                    image_bytes = search_itunes_cover(artist, cleaned_album)
                    source = "iTunes (stripped)"
                    if image_bytes:
                        process_file.album_art_cache[cleaned_key] = image_bytes

        # If still not found, try with common suffixes (EP, LP, etc.) stripped from album name
        if not image_bytes:
            suffix_stripped_album = strip_album_suffix(album)
            if suffix_stripped_album and suffix_stripped_album != album:
                suffix_key = (artist, suffix_stripped_album)
                image_bytes = process_file.album_art_cache.get(suffix_key)
                if image_bytes is None:
                    image_bytes = await fetch_srutil_cover(sr, artist, suffix_stripped_album)
                    if image_bytes:
                        process_file.album_art_cache[suffix_key] = image_bytes
                if not image_bytes:
                    image_bytes = search_musicbrainz_cover(normalize_name(artist), normalize_name(suffix_stripped_album))
                    source = "MusicBrainz (suffix-stripped)"
                    if image_bytes:
                        process_file.album_art_cache[suffix_key] = image_bytes
                if not image_bytes:
                    image_bytes = search_itunes_cover(artist, suffix_stripped_album)
                    source = "iTunes (suffix-stripped)"
                    if image_bytes:
                        process_file.album_art_cache[suffix_key] = image_bytes
        if isinstance(image_bytes, bytes):
            ok = embed_cover(file, image_bytes)
            status = "Embedded" if ok else "Failed to Embed"
            if ok:
                console.print(f"[green]Embedded cover art from {source}:[/green] {file}")
            else:
                console.print(f"[red]Failed to embed cover art ({source}):[/red] {file}")
        elif image_bytes:
            status = "Failed to Embed (not bytes)"
            console.print(f"[red]Failed to embed cover art (not bytes) ({source}):[/red] {file}")
        else:
            status = "Not Found"
            source = "-"
            console.print(f"[red]No cover art found:[/red] {file}")
        table.add_row(file, status, source)
        results.append([file, status, source])

async def main():
    console.print(f"[bold blue]Scanning directory: {MUSIC_DIR}[/bold blue]")
    sr = SRUtil()
    results = []
    files = []
    for root, _, filenames in os.walk(MUSIC_DIR):
        for fn in filenames:
            if os.path.splitext(fn)[1].lower() in AUDIO_EXTS:
                file_path = os.path.join(root, fn)
                files.append(file_path)

    table = Table(title="Cover Art Embedding Report")
    table.add_column("File", style="cyan", overflow="fold")
    table.add_column("Status", style="green")
    table.add_column("Source", style="magenta")


    sem = asyncio.Semaphore(CONCURRENCY)
    async def worker(file, sr, table, results, sem, progress, task_id):
        await process_file(file, sr, table, results, sem)
        progress.update(task_id, advance=1)

    with Progress(
        TextColumn("[progress.description]{task.description}"),
        BarColumn(),
        TaskProgressColumn(),
        TimeElapsedColumn(),
    ) as progress:
        task_id = progress.add_task("Processing files...", total=len(files))
        # Schedule all workers
        await asyncio.gather(*(worker(file, sr, table, results, sem, progress, task_id) for file in files))

    # Print summary table and CSV after progress bar
    console.print(table)
    with open(REPORT_CSV, "w", newline="") as f:
        writer = csv.writer(f)
        writer.writerow(["File", "Status", "Source"])
        writer.writerows(results)
    console.print(f"[bold green]CSV report written to {REPORT_CSV}[/bold green]")

if __name__ == "__main__":
    asyncio.run(main())