import sqlite3
import os
import time
from astrbot.core.db.po import (
    Platform, 
    Command, 
    Provider,
    Stats,
    LLMHistory
)
from . import BaseDatabase
from typing import Tuple


class SQLiteDatabase(BaseDatabase):
    def __init__(self, db_path: str) -> None:
        super().__init__()
        self.db_path = db_path
        
        with open(os.path.dirname(__file__) + "/sqlite_init.sql", "r") as f:
            sql = f.read()
        
        # 初始化数据库
        self.conn = self._get_conn(self.db_path)
        c = self.conn.cursor()
        c.executescript(sql)
        self.conn.commit()
    
    def _get_conn(self, db_path: str) -> sqlite3.Connection:
        conn = sqlite3.connect(self.db_path)
        conn.text_factory = str
        return conn
    
    def _exec_sql(self, sql: str, params: Tuple = None):
        conn = self.conn
        try:
            c = self.conn.cursor()
        except sqlite3.ProgrammingError:
            conn = self._get_conn(self.db_path)
            c = conn.cursor()
            
        if params:
            c.execute(sql, params)
            c.close()
        else:
            c.execute(sql)
            c.close()
        
        conn.commit()
        
    def insert_platform_metrics(self, metrics: dict):
        for k, v in metrics.items():
            self._exec_sql(
                '''
                INSERT INTO platform(name, count, timestamp) VALUES (?, ?, ?)
                ''', (k, v, int(time.time()))
            )

    def insert_plugin_metrics(self, metrics: dict):
        pass

    def insert_command_metrics(self, metrics: dict):
        for k, v in metrics.items():
            self._exec_sql(
                '''
                INSERT INTO command(name, count, timestamp) VALUES (?, ?, ?)
                ''', (k, v, int(time.time()))
            )

    def insert_llm_metrics(self, metrics: dict):
        for k, v in metrics.items():
            self._exec_sql(
                '''
                INSERT INTO llm(name, count, timestamp) VALUES (?, ?, ?)
                ''', (k, v, int(time.time()))
            )

    def update_llm_history(self, session_id: str, content: str):
        res = self.get_llm_history(session_id)
        if res:
            self._exec_sql(
                '''
                UPDATE llm_history SET content = ? WHERE session_id = ?
                ''', (content, session_id)
            )
        else:
            self._exec_sql(
                '''
                INSERT INTO llm_history(session_id, content) VALUES (?, ?)
                ''', (session_id, content)
            )

    def get_llm_history(self, session_id: str = None) -> Tuple:
        try:
            c = self.conn.cursor()
        except sqlite3.ProgrammingError:
            c = self._get_conn(self.db_path).cursor()
            
        where_clause = "" if session_id is None else f"WHERE session_id = '{session_id}'"
        c.execute(
            '''
            SELECT * FROM llm_history
            ''' + where_clause
        )
        res = c.fetchall()
        histories = []
        for row in res:
            histories.append(LLMHistory(*row))
        c.close()
        return histories

    def get_base_stats(self, offset_sec: int = 86400) -> Stats:
        '''获取 offset_sec 秒前到现在的基础统计数据'''
        where_clause = f" WHERE timestamp >= {int(time.time()) - offset_sec}"
        
        try:
            c = self.conn.cursor()
        except sqlite3.ProgrammingError:
            c = self._get_conn(self.db_path).cursor()
            
        c.execute(
            '''
            SELECT * FROM platform
            ''' + where_clause
        )
        
        platform = []
        for row in c.fetchall():
            platform.append(Platform(*row))
            
        # c.execute(
        #     '''
        #     SELECT * FROM command
        #     ''' + where_clause
        # )
        
        # command = []
        # for row in c.fetchall():
        #     command.append(Command(*row))
            
        # c.execute(
        #     '''
        #     SELECT * FROM llm
        #     ''' + where_clause
        # )
        
        # llm = []
        # for row in c.fetchall():
        #     llm.append(Provider(*row))
            
        c.close()
            
        return Stats(platform, [], [])
    
    def get_total_message_count(self) -> int:
        try:
            c = self.conn.cursor()
        except sqlite3.ProgrammingError:
            c = self._get_conn(self.db_path).cursor()
            
        c.execute(
            '''
            SELECT SUM(count) FROM platform
            '''
        )
        res = c.fetchone()
        c.close()
        return res[0]
    
    def get_grouped_base_stats(self, offset_sec: int = 86400) -> Stats:
        '''获取 offset_sec 秒前到现在的基础统计数据(合并)'''
        where_clause = f" WHERE timestamp >= {int(time.time()) - offset_sec}"
        
        try:
            c = self.conn.cursor()
        except sqlite3.ProgrammingError:
            c = self._get_conn(self.db_path).cursor()
            
        c.execute(
            '''
            SELECT name, SUM(count), timestamp FROM platform
            ''' + where_clause + " GROUP BY name"
        )
        
        platform = []
        for row in c.fetchall():
            platform.append(Platform(*row))
            
        # c.execute(
        #     '''
        #     SELECT name, SUM(count), timestamp FROM command
        #     ''' + where_clause + " GROUP BY name"
        # )
        
        # command = []
        # for row in c.fetchall():
        #     command.append(Command(*row))
            
        # c.execute(
        #     '''
        #     SELECT name, SUM(count), timestamp FROM llm
        #     ''' + where_clause + " GROUP BY name"
        # )
        
        # llm = []
        # for row in c.fetchall():
        #     llm.append(Provider(*row))
            
        c.close()
            
        return Stats(platform, [], [])