import os
import json
import requests
import glob
from tqdm import tqdm
from db import *

def yield_posts(file_dir=r"G:\database\post", from_id=0, end_id=7110548):
    """
    Yields the posts
    """
    # using listdir instead of glob because glob is slow
    files = []
    # walk through all files
    for root, dirs, filenames in os.walk(file_dir):
        for filename in filenames:
            if "_" not in filename:
                continue
            # 0_19.jsonl -> 0, 19
            start_id, end_id = filename.split(".")[0].split("_")
            start_id = int(start_id)
            end_id = int(end_id)
            if start_id > end_id:
                continue
            if end_id < from_id:
                continue
            files.append(os.path.join(root, filename))
    print(f"Total {len(files)} files")
    for file in files:
        with open(file, 'r') as f:
            yield from f.readlines()
            
def add_post_if_not_exist(post_string):
    try:
        post_data = json.loads(post_string)
    except Exception as e:
        print(f"Exception: {e} when loading {post_string}")
        return
    post_id = post_data['id']
    if (post:=Post.get_or_none(Post.id == post_id)) is not None:
        # check if it has valid tag list
        if not post.tag_list:
            # remove post
            Post.delete_by_id(post_id)
        else:
            return
    # prepare tags first
    for keys in ["tag_string_general, tag_string_artist, tag_string_character, tag_string_meta", "tag_string", "tag_string_copyright"]:
        if keys not in post_data:
            continue
        values = post_data[keys]
        if not values:
            continue
        if not isinstance(values, list):
            values = values.split(" ")
        current_value = []
        for value in values:
            tag = Tag.get_or_none(name=value)
            if tag is None:
                tag = Tag.create(name=value, type=keys.split("_")[-1], popularity=0)
            # assert unique, tag should not be iterable
            assert not isinstance(tag, list), f"Error: {tag} is iterable"
            current_value.append(tag.id)
        post_data[keys.replace("tag_string", "tag_list")] = current_value
        post_data[keys.replace("tag_string", "tag_count")] = len(current_value)
    # add post
    data = dict(
        id=post_id,
        created_at=post_data.get('created_at', None),
        source=post_data.get('source', ""),
        rating=post_data.get('rating', 'q'),
        score=post_data.get('score', 0),
        up_score=post_data.get('up_score', 0),
        down_score=post_data.get('down_score', 0),
        fav_count=post_data.get('fav_count', 0),
        tag_list_general=post_data.get('tag_list_general', []),
        tag_list_artist=post_data.get('tag_list_artist', []),
        tag_list_character=post_data.get('tag_list_character', []),
        tag_list_meta=post_data.get('tag_list_meta', []),
        tag_list=post_data.get('tag_list', []),
        tag_list_copyright=post_data.get('tag_list', []),
        tag_count_general=post_data.get('tag_count_general', 0),
        tag_count_artist=post_data.get('tag_count_artist', 0),
        tag_count_character=post_data.get('tag_count_character', 0),
        tag_count_meta=post_data.get('tag_count_meta', 0),
        tag_count=post_data.get('tag_count', 0),
        tag_count_copyright=post_data.get('tag_count', 0),
        uploader_id=post_data.get('uploader_id', 0),
        md5=post_data.get('md5', None),
        parent_id=post_data.get('parent_id', None),
        has_children=post_data.get('has_children', False),
        is_deleted=post_data.get('is_deleted', False),
        is_banned=post_data.get('is_banned', False),
        pixiv_id=post_data.get('pixiv_id', None),
        has_active_children=post_data.get('has_active_children', False),
        bit_flags=post_data.get('bit_flags', 0),
        has_large=post_data.get('has_large', False),
        has_visible_children=post_data.get('has_visible_children', False),
        image_width=post_data.get('image_width', 0),
        image_height=post_data.get('image_height', 0),
        file_size=post_data.get('file_size', 0),
        file_ext=post_data.get('file_ext', "jpg"),
        file_url=post_data.get('file_url', ""),
        large_file_url=post_data.get('large_file_url', ""),
        preview_file_url=post_data.get('preview_file_url', "")
    )
    # create from dict
    Post.create(**data)
    print(f"Added post {post_id}")

def main():
    last_post_id = Post.select().order_by(Post.id.desc()).get().id
    print(f"Last post id: {last_post_id}")
    with db.atomic():
        pbar = tqdm(total=7110548 - last_post_id)
        for post_string in yield_posts(from_id=last_post_id):
            try:
                add_post_if_not_exist(post_string)
            except Exception as e:
                if isinstance(e, KeyboardInterrupt):
                    raise e
                print(f"Exception: {e} when adding {post_string}")
                raise e
            pbar.update(1)
    print("Done")

if __name__ == "__main__":
    main()