import random
import time

from core.command_param_types import Const, Int, Any
from core.db import DB
from core.decorators import instance, command
from core.text import Text


@instance()
class QuoteController:
    def inject(self, registry):
        self.db: DB = registry.get_instance("db")
        self.text: Text = registry.get_instance("text")

    def start(self):
        self.db.exec("CREATE TABLE IF NOT EXISTS quote ("
                     "id INT PRIMARY KEY AUTO_INCREMENT, "
                     "char_id INT NOT NULL, "
                     "created_at INT NOT NULL, "
                     "content VARCHAR(4096) NOT NULL)")

    @command(command="quote", params=[], access_level="all",
             description="Show a random quote")
    def quote_command(self, request):
        quote = self.get_quote_info()

        if quote:
            return quote
        else:
            return "There are no quotes to display."

    @command(command="quote", params=[Int("quote_id")], access_level="all",
             description="Show a specific quote")
    def quote_view_command(self, _, quote_id):
        quote = self.get_quote_info(quote_id)

        if quote:
            return quote
        else:
            return f"Could not find quote with ID <highlight>{quote_id:d}</highlight>."

    @command(command="quote", params=[Const("add"), Any("quote")], access_level="all",
             description="Show a specific quote")
    def quote_add_command(self, request, _, quote):
        if len(quote) > 4096:
            return "Your quote must be less than 4096 characters."

        self.db.exec("INSERT INTO quote (char_id, created_at, content) "
                     "VALUES (?, ?, ?)",
                     [request.sender.char_id, int(time.time()), quote])

        return "Your quote has been added successfully."

    def get_quote_info(self, quote_id=None):
        stats = self.db.query_single("SELECT COUNT(1) AS count, MAX(id) AS max FROM quote")

        if stats.count == 0:
            return None

        if not quote_id:
            row = self.db.query_single("SELECT q.*, p.name FROM quote q "
                                       "LEFT JOIN player p ON q.char_id = p.char_id "
                                       "LIMIT 1 OFFSET ?",
                                       [random.randint(0, stats.count - 1)])
        else:
            row = self.db.query_single("SELECT q.*, p.name FROM quote q "
                                       "LEFT JOIN player p ON q.char_id = p.char_id "
                                       "WHERE id = ?",
                                       [quote_id])

        return f"{row.id:d}. {row.content}"