import sqlite3
from pathlib import Path
from datetime import datetime
from lollms.helpers import ASCIIColors

__author__ = "parisneo"
__github__ = "https://github.com/ParisNeo/lollms-webui"
__copyright__ = "Copyright 2023, "
__license__ = "Apache 2.0"


# =================================== Database ==================================================================
class DiscussionsDB:
    MSG_TYPE_NORMAL         = 0
    MSG_TYPE_CONDITIONNING  = 1

    def __init__(self, db_path="database.db"):
        self.db_path = Path(db_path)
        self.db_path .parent.mkdir(exist_ok=True, parents= True)


    def create_tables(self):
        db_version = 6
        with sqlite3.connect(self.db_path) as conn:
            cursor = conn.cursor()

            cursor.execute("""
                CREATE TABLE IF NOT EXISTS schema_version (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    version INTEGER NOT NULL
                )
            """)

            cursor.execute("""
                CREATE TABLE IF NOT EXISTS discussion (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    title TEXT,
                    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
                )
            """)

            cursor.execute("""
                CREATE TABLE IF NOT EXISTS message (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    binding TEXT,
                    model TEXT,
                    personality TEXT,
                    sender TEXT NOT NULL,
                    content TEXT NOT NULL,
                    type INT NOT NULL,
                    rank INT NOT NULL,
                    parent INT,
                    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                    finished_generating_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                    discussion_id INTEGER NOT NULL,
                    FOREIGN KEY (discussion_id) REFERENCES discussion(id),
                    FOREIGN KEY (parent) REFERENCES message(id)
                )
            """)

            cursor.execute("SELECT * FROM schema_version")
            row = cursor.fetchone()

            if row is None:
                cursor.execute("INSERT INTO schema_version (version) VALUES (?)", (db_version,))
            else:
                cursor.execute("UPDATE schema_version SET version = ?", (db_version,))            

            conn.commit()

    def add_missing_columns(self):
        with sqlite3.connect(self.db_path) as conn:
            cursor = conn.cursor()

            table_columns = {
                'discussion': [
                    'id',
                    'title',
                    'created_at'
                ],
                'message': [
                    'id',
                    'binding',
                    'model',
                    'personality',
                    'sender',
                    'content',
                    'type',
                    'rank',
                    'parent',
                    'created_at',
                    'finished_generating_at',
                    'discussion_id'
                ]
            }

            for table, columns in table_columns.items():
                cursor.execute(f"PRAGMA table_info({table})")
                existing_columns = [column[1] for column in cursor.fetchall()]

                for column in columns:
                    if column not in existing_columns:
                        if column == 'id':
                            cursor.execute(f"ALTER TABLE {table} ADD COLUMN {column} INTEGER PRIMARY KEY AUTOINCREMENT")
                        elif column.endswith('_at'):
                            cursor.execute(f"ALTER TABLE {table} ADD COLUMN {column} TIMESTAMP")
                        else:
                            cursor.execute(f"ALTER TABLE {table} ADD COLUMN {column} TEXT")

            conn.commit()


    def select(self, query, params=None, fetch_all=True):
        """
        Execute the specified SQL select query on the database,
        with optional parameters.
        Returns the cursor object for further processing.
        """
        with sqlite3.connect(self.db_path) as conn:
            if params is None:
                cursor = conn.execute(query)
            else:
                cursor = conn.execute(query, params)
            if fetch_all:
                return cursor.fetchall()
            else:
                return cursor.fetchone()
            

    def delete(self, query, params=None):
        """
        Execute the specified SQL delete query on the database,
        with optional parameters.
        Returns the cursor object for further processing.
        """
        with sqlite3.connect(self.db_path) as conn:
            cursor = conn.cursor()
            if params is None:
                cursor.execute(query)
            else:
                cursor.execute(query, params)
            conn.commit()
   
    def insert(self, query, params=None):
        """
        Execute the specified INSERT SQL query on the database,
        with optional parameters.
        Returns the ID of the newly inserted row.
        """
        
        with sqlite3.connect(self.db_path) as conn:
            cursor = conn.execute(query, params)
            rowid = cursor.lastrowid
            conn.commit()
        self.conn = None
        return rowid

    def update(self, query, params=None):
        """
        Execute the specified Update SQL query on the database,
        with optional parameters.
        Returns the ID of the newly inserted row.
        """
        
        with sqlite3.connect(self.db_path) as conn:
            conn.execute(query, params)
            conn.commit()
    
    def load_last_discussion(self):
        last_discussion_id = self.select("SELECT id FROM discussion ORDER BY id DESC LIMIT 1", fetch_all=False)
        if last_discussion_id is None:
            last_discussion = self.create_discussion()
            last_discussion_id = last_discussion.discussion_id
        else:
            last_discussion_id = last_discussion_id[0]
        self.current_message_id = self.select("SELECT id FROM message WHERE discussion_id=? ORDER BY id DESC LIMIT 1", (last_discussion_id,), fetch_all=False)
        return Discussion(last_discussion_id, self)
    
    def create_discussion(self, title="untitled"):
        """Creates a new discussion

        Args:
            title (str, optional): The title of the discussion. Defaults to "untitled".

        Returns:
            Discussion: A Discussion instance 
        """
        discussion_id = self.insert(f"INSERT INTO discussion (title) VALUES (?)",(title,))
        return Discussion(discussion_id, self)

    def build_discussion(self, discussion_id=0):
        return Discussion(discussion_id, self)

    def get_discussions(self):
        rows = self.select("SELECT * FROM discussion")         
        return [{"id": row[0], "title": row[1]} for row in rows]

    def does_last_discussion_have_messages(self):
        last_discussion_id = self.select("SELECT id FROM discussion ORDER BY id DESC LIMIT 1", fetch_all=False)
        if last_discussion_id is None:
            last_discussion = self.create_discussion()
            last_discussion_id = last_discussion.discussion_id
        else:
            last_discussion_id = last_discussion_id[0]
        last_message = self.select("SELECT * FROM message WHERE discussion_id=?", (last_discussion_id,), fetch_all=False)
        return last_message is not None
    
    def remove_discussions(self):
        self.delete("DELETE FROM message")
        self.delete("DELETE FROM discussion")


    def export_to_json(self):
        db_discussions = self.select("SELECT * FROM discussion")
        discussions = []
        for row in db_discussions:
            discussion_id = row[0]
            discussion_title = row[1]
            discussion = {"id": discussion_id, "title":discussion_title, "messages": []}
            rows = self.select(f"SELECT sender, content, message_type, rank, parent, binding, model, personality, created_at, finished_generating_at FROM message WHERE discussion_id=?",(discussion_id,))
            for message_row in rows:
                sender = message_row[1]
                content = message_row[2]
                content_type = message_row[3]
                rank = message_row[4]
                parent = message_row[5]
                binding = message_row[6]
                model = message_row[7]
                personality = message_row[8]
                created_at = message_row[9]
                finished_generating_at = message_row[10]
                
                discussion["messages"].append(
                    {"sender": sender, "content": content, "type": content_type, "rank": rank, "parent": parent, "binding": binding, "model":model, "personality":personality, "created_at":created_at, "finished_generating_at":finished_generating_at}
                )
            discussions.append(discussion)
        return discussions

    def export_discussions_to_json(self, discussions_ids:list):
        # Convert the list of discussion IDs to a tuple
        discussions_ids_tuple = tuple(discussions_ids)
        txt = ','.join(['?'] * len(discussions_ids_tuple))
        db_discussions = self.select(
            f"SELECT * FROM discussion WHERE id IN ({txt})",
            discussions_ids_tuple
        )
        discussions = []
        for row in db_discussions:
            discussion_id = row[0]
            discussion_title = row[1]
            discussion = {"id": discussion_id, "title":discussion_title, "messages": []}
            rows = self.select(f"SELECT sender, content, message_type, rank, parent, binding, model, personality, created_at, finished_generating_at FROM message WHERE discussion_id=?",(discussion_id,))
            for message_row in rows:
                sender = message_row[1]
                content = message_row[2]
                content_type = message_row[3]
                rank = message_row[4]
                parent = message_row[5]
                binding = message_row[6]
                model = message_row[7]
                personality = message_row[8]
                created_at = message_row[9]
                finished_generating_at = message_row[10]
                
                discussion["messages"].append(
                    {"sender": sender, "content": content, "type": content_type, "rank": rank, "parent": parent, "binding": binding, "model":model, "personality":personality, "created_at":created_at, "finished_generating_at": finished_generating_at}
                )
            discussions.append(discussion)
        return discussions
    
    def import_from_json(self, json_data):
        discussions = []
        data = json_data
        for discussion_data in data:
            discussion_id = discussion_data.get("id")
            discussion_title = discussion_data.get("title")
            messages_data = discussion_data.get("messages", [])
            discussion = {"id": discussion_id, "title": discussion_title, "messages": []}

            # Insert discussion into the database
            discussion_id = self.insert("INSERT INTO discussion (title) VALUES (?)", (discussion_title,))

            for message_data in messages_data:
                sender = message_data.get("sender")
                content = message_data.get("content")
                content_type = message_data.get("type")
                rank = message_data.get("rank")
                parent = message_data.get("parent")
                binding = message_data.get("binding","")
                model = message_data.get("model","")
                personality = message_data.get("personality","")
                created_at = message_data.get("created_at",datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
                finished_generating_at = message_data.get("finished_generating_at",datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
                discussion["messages"].append(
                    {"sender": sender, "content": content, "type": content_type, "rank": rank, "binding": binding, "model": model, "personality": personality, "created_at": created_at, "finished_generating_at": finished_generating_at}
                )

                # Insert message into the database
                self.insert("INSERT INTO message (sender, content, type, rank, parent, binding, model, personality, created_at, finished_generating_at, discussion_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
                            (sender, content, content_type, rank, parent, model, personality, created_at, finished_generating_at, discussion_id))

            discussions.append(discussion)

        return discussions

class Discussion:
    def __init__(self, discussion_id, discussions_db:DiscussionsDB):
        self.discussion_id = discussion_id
        self.discussions_db = discussions_db

    def add_message(self, sender, content, message_type=0, rank=0, parent=0, binding="", model ="", personality="", created_at=datetime.now().strftime('%Y-%m-%d %H:%M:%S'), finished_generating_at=datetime.now().strftime('%Y-%m-%d %H:%M:%S')):
        """Adds a new message to the discussion

        Args:
            sender (str): The sender name
            content (str): The text sent by the sender

        Returns:
            int: The added message id
        """
        message_id = self.discussions_db.insert(
            "INSERT INTO message (sender, content, type, rank, parent, binding, model, personality, created_at, finished_generating_at, discussion_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)", 
            (sender, content, message_type, rank, parent, binding, model, personality, created_at, finished_generating_at, self.discussion_id)
        )
        return message_id

    def rename(self, new_title):
        """Renames the discussion

        Args:
            new_title (str): The nex discussion name
        """
        self.discussions_db.update(
            f"UPDATE discussion SET title=? WHERE id=?",(new_title,self.discussion_id)
        )

    def delete_discussion(self):
        """Deletes the discussion
        """
        self.discussions_db.delete(
            f"DELETE FROM message WHERE discussion_id={self.discussion_id}"
        )
        self.discussions_db.delete(
            f"DELETE FROM discussion WHERE id={self.discussion_id}"
        )

    def get_messages(self):
        """Gets a list of messages information

        Returns:
            list: List of entries in the format {"id":message id, "sender":sender name, "content":message content, "type":message type, "rank": message rank}
        """
        rows = self.discussions_db.select(
            "SELECT id, sender, content, type, rank, parent, binding, model, personality, created_at, finished_generating_at FROM message WHERE discussion_id=?", (self.discussion_id,)
        )

        return [{"id": row[0], "sender": row[1], "content": row[2], "type": row[3], "rank": row[4], "parent": row[5], "binding":row[6], "model": row[7], "personality": row[8], "created_at": row[9], "finished_generating_at": row[10]} for row in rows]

    def update_message(self, message_id, new_content):
        """Updates the content of a message

        Args:
            message_id (int): The id of the message to be changed
            new_content (str): The nex message content
        """
        self.discussions_db.update(
            f"UPDATE message SET content = ?, finished_generating_at = ? WHERE id = ?",(new_content, datetime.now().strftime('%Y-%m-%d %H:%M:%S'),message_id)
        )
    
    def message_rank_up(self, message_id):
        """Increments the rank of the message

        Args:
            message_id (int): The id of the message to be changed
        """
        # Retrieve current rank value for message_id
        current_rank = self.discussions_db.select("SELECT rank FROM message WHERE id=?", (message_id,),False)[0]

        # Increment current rank value by 1
        new_rank = current_rank + 1        
        self.discussions_db.update(
            f"UPDATE message SET rank = ? WHERE id = ?",(new_rank,message_id)
        )
        return new_rank

    def message_rank_down(self, message_id):
        """Increments the rank of the message

        Args:
            message_id (int): The id of the message to be changed
        """
        # Retrieve current rank value for message_id
        current_rank = self.discussions_db.select("SELECT rank FROM message WHERE id=?", (message_id,),False)[0]

        # Increment current rank value by 1
        new_rank = current_rank - 1        
        self.discussions_db.update(
            f"UPDATE message SET rank = ? WHERE id = ?",(new_rank,message_id)
        )
        return new_rank
    
    def delete_message(self, message_id):
        """Delete the message

        Args:
            message_id (int): The id of the message to be deleted
        """
        # Retrieve current rank value for message_id
        self.discussions_db.delete("DELETE FROM message WHERE id=?", (message_id,))

# ========================================================================================================================