import argparse
from copy import deepcopy
from typing import List, Optional

from rich import prompt
from tabulate import tabulate

from xklb import consts, db, utils
from xklb.utils import log


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        usage="""library merge-online-local database

    If you have previously downloaded YouTube or other online media, you can dedupe
    your database and combine the online and local media records as long as your
    files have the youtube-dl / yt-dlp id in the filename.
    """
    )
    parser.add_argument("database")
    parser.add_argument("--limit", "-L", "-l", "-queue", "--queue", default=100)
    parser.add_argument("--verbose", "-v", action="count", default=0)
    args = parser.parse_args()
    args.db = db.connect(args)
    log.info(utils.dict_filter_bool(args.__dict__))
    return args


def get_duplicates(args) -> List[dict]:
    query = f"""
    WITH m1 as (
        SELECT
            *
        FROM
            media
        WHERE 1=1
            and id is not null
            and id != ""
            and ie_key != 'Local'
            and time_deleted = 0
    )
    SELECT
        m2.path keep_path
        , m1.path duplicate_path
        , m1.title
    FROM m1, (
        SELECT
            rowid,
            *
        FROM
            media
        WHERE 1=1
            and time_deleted = 0
            and id is null
            and title is null
    ) m2
    JOIN media_fts on m2.rowid = media_fts.rowid
    WHERE m2.ie_key = 'Local'
        AND m1.ie_key NOT IN ('NBCStations', 'TedTalk', 'ThisAmericanLife', 'InfoQ', 'NFB', 'KickStarter')
        AND media_fts.path MATCH '"'||m1.id||'"'
        AND m2.PATH LIKE '%['||m1.id||']%'
    ORDER BY 1=1
        , length(m2.path)-length(REPLACE(m2.path, '/', '')) desc
        , length(m2.path)-length(REPLACE(m2.path, '.', ''))
        , length(m2.path)
        , m2.time_modified desc
        , m2.time_created desc
        , m2.duration desc
        , m2.path desc
    """

    media = list(args.db.query(query))
    return media


def get_dict(args, path) -> Optional[dict]:
    known = list(args.db.query("select * from media where path=?", [path]))[0]
    return utils.dict_filter_bool(known, keep_0=False)


def merge_online_local() -> None:
    args = parse_args()
    args.db["media"].rebuild_fts()
    duplicates = get_duplicates(args)
    duplicates_count = len(duplicates)

    tbl = deepcopy(duplicates)
    tbl = tbl[: int(args.limit)]
    tbl = utils.col_resize(tbl, "keep_path", 30)
    tbl = utils.col_resize(tbl, "duplicate_path", 30)
    tbl = utils.col_naturalsize(tbl, "duplicate_size")
    print(tabulate(tbl, tablefmt="fancy_grid", headers="keys", showindex=False))

    print(f"{duplicates_count} duplicates found (showing first {args.limit})")
    if duplicates and prompt.Confirm.ask("Merge duplicates?", default=False):  # type: ignore
        print("Merging...")

        merged = []
        for d in duplicates:
            fspath = d["keep_path"]
            webpath = d["duplicate_path"]
            if webpath in merged or fspath == webpath:
                continue

            tube_entry = get_dict(args, webpath)
            fs_tags = get_dict(args, fspath)

            if not tube_entry or not fs_tags or tube_entry["id"] not in fs_tags["path"]:
                continue

            if fs_tags["time_modified"] is None or fs_tags["time_modified"] == 0:
                fs_tags["time_modified"] = consts.NOW
            if fs_tags["time_downloaded"] is None or fs_tags["time_downloaded"] == 0:
                fs_tags["time_downloaded"] = consts.NOW

            entry = {**tube_entry, **fs_tags, "webpath": webpath}
            args.db["media"].insert(utils.dict_filter_bool(entry), pk="path", alter=True, replace=True)  # type: ignore
            args.db["media"].delete(webpath)
            merged.append(webpath)

        print(len(merged), "merged")


if __name__ == "__main__":
    merge_online_local()
