from .db import Model, db
from .constants import PermissionLevel

class Users(Model):
    table = "users"

    def is_guest(self):
        return self.permission == PermissionLevel.GUEST.value

    def is_mod(self):
        return self.permission >= PermissionLevel.MODERATOR.value

    def is_admin(self):
        return self.permission == PermissionLevel.ADMIN.value

    def is_system(self):
        return self.permission == PermissionLevel.SYSTEM.value

    def is_default_avatar(self):
        return self.avatar_id == 1

    def get_latest_posts(self):
        q = """SELECT
                posts.id, posts.created_at, post_history.content, post_history.edited_at, threads.title AS thread_title, topics.name as topic_name, threads.slug as thread_slug
            FROM
                posts
            JOIN
                post_history ON posts.current_revision_id = post_history.id
            JOIN
                threads ON posts.thread_id = threads.id
            JOIN
                topics ON threads.topic_id = topics.id
            WHERE
                posts.user_id = ?
            ORDER BY posts.created_at DESC
            LIMIT 10"""
        return db.query(q, self.id)

    def get_post_stats(self):
        q = """SELECT
                COUNT(posts.id) AS post_count,
                COUNT(DISTINCT threads.id) AS thread_count,
                MAX(threads.title) FILTER (WHERE threads.created_at = latest.created_at) AS latest_thread_title,
                MAX(threads.slug) FILTER (WHERE threads.created_at = latest.created_at) AS latest_thread_slug
            FROM users
            LEFT JOIN posts ON posts.user_id = users.id
            LEFT JOIN threads ON threads.user_id = users.id
            LEFT JOIN (
                SELECT user_id, MAX(created_at) AS created_at
                FROM threads
                GROUP BY user_id
                ) latest ON latest.user_id = users.id
            WHERE users.id = ?"""
        return db.fetch_one(q, self.id)

class Topics(Model):
    table = "topics"

class Threads(Model):
    table = "threads"

class Posts(Model):
    table = "posts"

class PostHistory(Model):
    table = "post_history"

class Sessions(Model):
    table = "sessions"

class Avatars(Model):
    table = "avatars"

class Subscriptions(Model):
    table = "subscriptions"