import json
from flask import Flask


from .databaseController import DatabaseController
from .endpoints.query import Query
from .endpoints.command import Command
from .endpoints.commands import Commands
from .endpoints.post import GetPost
from .endpoints.posts import GetPosts
from .endpoints.new_query import NewQuery
from .endpoints.set_action import SetAction
from .endpoints.posts_count import GetPostsCount
from .endpoints.account_stats import AccountStats

class Database:
    db : DatabaseController = None
    app : Flask = None

    def __init__(self, api) -> None:
        self.app = api.app

        if "Archive" in self.app.databases:
            del self.app.databases["Archive"]

        self.reload_data("/home/pi/python/Katbots/JapariArchive/database.db")

        self.app.databases["Archive"] = self

        api.add_resource(Query, "/Archive/Query")
        api.add_resource(NewQuery, "/Archive/NewQuery")
        api.add_resource(Command, "/Archive/Command")
        api.add_resource(Commands, "/Archive/Commands")
        api.add_resource(GetPost, "/Archive/GetPost/<id>")
        api.add_resource(GetPosts, "/Archive/GetPosts")
        api.add_resource(GetPostsCount, "/Archive/GetPosts/Count")
        api.add_resource(AccountStats, "/Archive/AccountStats")
        api.add_resource(SetAction, "/Archive/SetAction")
  
    def get_accounts(self):
        query = f'''
        SELECT x_handle, id FROM accounts 
        ORDER BY x_handle ASC'''

        return self.db.run_query(query)

    def get_account_stats(self):
        query = '''SELECT x_handle,
	SUM(IIF(x_posts.action_taken = 0, 1, 0)) as undecided,
	SUM(IIF(x_posts.action_taken = 1, 1, 0)) as approved,
	SUM(IIF(x_posts.action_taken = 2, 1, 0)) as deleted,
	SUM(IIF(x_posts.action_taken = 3, 1, 0)) as hidden,
	SUM(IIF(x_post_details.id is NULL, 1, 0)) as invalid
FROM accounts 
	LEFT JOIN x_posts on accounts.id = x_posts.account_id 
	LEFT JOIN x_post_details on x_post_details.id = x_posts.id
WHERE accounts.download_mode != 4
GROUP BY account_id 
ORDER BY x_handle'''
        return self.db.run_query(query)

    def get_post(self, id):
        query = f'''SELECT x_posts.id, cast(x_posts.id as TEXT) as id_str, x_posts.error_id, x_posts.action_taken, x_posts.is_saved, x_post_details.text, x_post_details.files, x_post_details.date, accounts.x_handle, accounts.rating from x_posts
        LEFT JOIN x_post_details
            ON x_posts.id = x_post_details.id
        LEFT JOIN accounts
            ON x_posts.account_id = accounts.id WHERE x_posts.id = {id}
        LIMIT 1'''
        result = self.db.run_query(query)
        if len(result) == 0:
            return None
        else:
            #return most recent post
            return result[-1]

    def build_where_query(self, artist, actions_taken = [0, 1, 2, 3], last_id = -1, include_ratings = ["SFW", "NSFW"]):
        where_query = "WHERE x_post_details.id NOT NULL AND x_posts.error_id = 0"
        if last_id != -1:
            where_query += f" AND x_posts.id < {last_id}"
        if actions_taken != [0, 1, 2, 3]:
            where_query += " AND (" + " OR ".join([f"x_posts.action_taken = {action}" for action in actions_taken]) + ")"
        if include_ratings != ["SFW", "NSFW", "NSFL"]:
            where_query += " AND (" + " OR ".join([f'accounts.rating = "{rating}"' for rating in include_ratings]) + ")"
        if artist is not None and artist != "":
            where_query += f' AND accounts.x_handle = "{artist}"'
        return where_query

    def get_posts_count(self, artist, actions_taken = [0, 1, 2, 3], last_id = -1, include_ratings = ["SFW", "NSFW"]):
        where_query = self.build_where_query(artist, actions_taken, last_id, include_ratings)

        query = f'''
        SELECT count(*) as count FROM x_posts 
        LEFT JOIN x_post_details
            ON x_posts.id = x_post_details.id
        LEFT JOIN accounts
            ON x_posts.account_id = accounts.id
        {where_query}'''

        result = self.db.run_query(query)
        return result[0]["count"]

    def get_posts(self, num_posts, artist, actions_taken = [0, 1, 2, 3], last_id = -1, offset = 0, include_ratings = ["SFW", "NSFW"], order = "DESC"):
        num_posts = max(1, min(num_posts, 100))

        order_by = "RANDOM()" if order == "RAND" else "x_posts.id ASC" if order == "ASC" else "x_posts.id DESC"

        where_query = self.build_where_query(artist, actions_taken, last_id, include_ratings)

        query = f'''
        SELECT x_posts.id, cast(x_posts.id as TEXT) as id_str, x_posts.action_taken, x_posts.is_saved, x_post_details.text, x_post_details.files, x_post_details.date, accounts.x_handle, accounts.rating FROM x_posts 
        LEFT JOIN x_post_details
            ON x_posts.id = x_post_details.id
        LEFT JOIN accounts
            ON x_posts.account_id = accounts.id
        {where_query}
        ORDER BY {order_by}
        LIMIT {num_posts} OFFSET {offset}'''

        return self.db.run_query(query)

    def wrap_query_response(self, result, mode = "json"):
        if result is None:
            response = self.app.response_class(status=400)
        else:
            if mode == "json":
                response = self.app.response_class(
                    response=json.dumps(result, ensure_ascii=False, indent=1),
                    status=200,
                    mimetype='application/json'
            )
            elif mode == "text":
                response = self.app.response_class(
                    response=str(result),
                    status=200,
                    mimetype='text/plain'
            )
                
        response.headers.add("Access-Control-Allow-Origin", "*")
        return response

    def reload_data(self, database_path):
        self.db = DatabaseController(database_path)