from langchain_postgres import PostgresChatMessageHistory
from config.pgDb import pg_pool
from config.ssDb import mssql_pool
from typing import List, Dict
import json

# ————————————————————————————————————————————————————AI角色———————————————————————————————

database_name = "ai_chat_history"


def get_ai_personality(ai_id: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT ai_personality FROM ai_chat_profiles WHERE id = %s",
                (ai_id,)
            )
            row = cur.fetchone()
            if row:
                return row[0]
            else:
                return "你是一个乐于助人的AI助手，请保持中文简洁回答用户。"


def get_description(ai_id: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT description FROM ai_chat_profiles WHERE id = %s",
                (ai_id,)
            )
            row = cur.fetchone()
            if row:
                return row[0]
            else:
                return "你是一个乐于助人的AI助手，请保持中文简洁回答用户。"


def get_ai_available_kn_bases(ai_id: str) -> List[str]:
    with pg_pool.getConn() as conn:
        result = conn.execute(
            "SELECT available_kn_bases FROM ai_chat_profiles WHERE id = %s",
            (ai_id,)
        )
        return result.fetchone()[0]


def get_all_ai_bot(user_id: str, module: str) -> List[Dict]:
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            # 查询用户角色
            cur.execute(
                "SELECT roles FROM users WHERE id = %s",
                (user_id,)
            )
            role_row = cur.fetchone()
            if not role_row:
                return []  # 用户不存在
            user_roles = role_row[0]

            # 查询 AI 角色 JSON 字段包含用户角色

            cur.execute(
                """
                SELECT id, title, description, welcome_words, ai_personality, available_report_tables, available_kn_bases
                FROM ai_chat_profiles
                WHERE available_module = %s
                AND is_active = TRUE
                AND available_roles::jsonb ?| %s
                """,
                (module, user_roles)
            )
            rows = cur.fetchall()
            result = []
            for row in rows:
                # row 索引对应 SELECT 字段顺序
                id_, title, description, welcome_words, ai_personality, available_report_tables, available_kn_bases = row

                # 解析 JSON
                roles_json = ai_personality if ai_personality else {}
                result.append({
                    "id": id_,
                    "title": title,
                    "description": description,
                    "welcome_words": welcome_words,
                    "name": roles_json.get("名字", ""),
                    "role": roles_json.get("性格", ""),
                    "service": roles_json.get("业务", ""),
                    "available_report_tables": available_report_tables,
                    "available_kn_bases": available_kn_bases
                })

            return result


# ————————————————————————————————————————————————————消息———————————————————————————————
def insert_message(session_id: str, isAI: bool, content: str):
    with pg_pool.getConn() as conn:
        history = PostgresChatMessageHistory(
            database_name,
            session_id,
            sync_connection=conn
        )
        if isAI:
            history.add_ai_message(content)
        else:
            history.add_user_message(content)


def get_history(session_id: str):
    simplified = []
    with pg_pool.getConn() as conn:
        history = PostgresChatMessageHistory(
            database_name,
            session_id,
            sync_connection=conn
        )
        for msg in history.messages:
            simplified.append({
                "type": msg.type,
                "content": msg.content
            })
        return simplified


def get_history_with_time(session_id: str, number: int):
    simplified = []
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                f"SELECT message, created_at FROM ai_chat_history WHERE session_id = '{session_id}' ORDER BY created_at DESC LIMIT {number}")
            rows = cur.fetchall()
            simplified = []

            for row in rows:
                msg_dict = row[0]
                simplified.append({
                    "type": msg_dict.get("type"),
                    "created_at": row[1].isoformat(),
                    "content": msg_dict.get("data", {}).get("content")
                })

        return simplified


# ————————————————————————————————————————————————————会话———————————————————————————————
def insert_session(user_id: str, ai_id: str, session_id: str, session_title: str, available_module):
    with pg_pool.getConn() as coon:
        with coon.cursor() as cur:
            cur.execute(
                "INSERT INTO ai_chat_sessions (id ,user_id, ai_id, title, available_module, created_at, updated_at) VALUES (%s, %s, %s, %s,%s, NOW(), NOW())",
                (session_id, user_id, ai_id, session_title, available_module)
            )
            coon.commit()


def update_session_updated_at(session_id: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "UPDATE ai_chat_sessions SET updated_at = NOW() WHERE id = %s",
                (session_id,)
            )
            conn.commit()


def get_sessions(user_id: str, available_module: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT id, title, updated_at "
                "FROM ai_chat_sessions "
                "WHERE user_id = %s AND available_module = %s "
                "ORDER BY updated_at DESC",
                (user_id, available_module)
            )

            sessions = cur.fetchall()
            return [
                {
                    "id": row[0],
                    "title": row[1],
                    "updated_at": row[2]
                }
                for row in sessions
            ]


# ————————————————————————————————————————————————————报表———————————————————————————————
def get_reports(user_id: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT id, title FROM ai_reports WHERE created_by = %s AND is_masked = TRUE ORDER BY created_at DESC",
                (user_id,)
            )
            reports = cur.fetchall()
            return [
                {
                    "id": row[0],
                    "title": row[1]
                }
                for row in reports
            ]


def save_report(id: str, user_id: str, title: str, sql: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "INSERT INTO ai_reports (id, title, sql, created_at, created_by , is_masked) VALUES (%s, %s, %s, NOW(), %s, FALSE) RETURNING id",
                (id, title, sql, user_id)
            )
            report_id = cur.fetchone()[0]
            conn.commit()
            return report_id


def maked_report(report_id: str, title: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "UPDATE ai_reports SET title = %s, is_masked = TRUE WHERE id = %s",
                (title, report_id)
            )
            conn.commit()


def getSQL(reportId: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            cur.execute(
                "SELECT sql FROM ai_reports WHERE id = %s",
                (reportId,)
            )
            row = cur.fetchone()
            if row:
                return row[0]
            else:
                return ""


def get_available_tables_str(aiId: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cur:
            # 1. 先取 AI 可用的数据库表
            cur.execute(
                "SELECT available_report_tables FROM ai_chat_profiles WHERE id = %s",
                (aiId,)
            )
            role_row = cur.fetchone()
            if not role_row:
                return "无数据库表可用"
            available_tables = role_row[0]  # 假设是列表

            if not available_tables:
                return "无数据库表可用"

            # 2. 构造 IN 查询占位符
            placeholders = ','.join(['%s'] * len(available_tables))
            sql_query = f"""
                SELECT id, name, description
                FROM ai_reports_tables
                WHERE id IN ({placeholders}) AND is_active = TRUE
            """
            cur.execute(sql_query, available_tables)
            tableIds = cur.fetchall()

            # 3. 查询这些表的字段
            result = ""
            for table in tableIds:
                cur.execute(
                    "SELECT name, type, description FROM ai_reports_fields WHERE table_id = %s AND is_active = TRUE",
                    (table[0],)
                )
                columns = cur.fetchall()
                result += f"{table[1]}：{table[2]}\n"
                result += "字段名,数据类型,描述\n"
                for column in columns:
                    result += f"{column[0]},{column[1]}, {column[2]}\n"
                result += "\n"
            return result


# -------------------报表数据源------------------
# 获取表
def get_available_tables():
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            cursor.execute(
                "SELECT id, name, description,is_active FROM ai_reports_tables",
            )
            return [{"id": row[0], "name": row[1], "description": row[2], "is_active": row[3]} for row in
                    cursor.fetchall()]


# 新增表
def add_table(name, description, user_id):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            cursor.execute(
                """
                INSERT INTO ai_reports_tables (name, description, create_by)
                VALUES (%s, %s, %s)
                RETURNING id
                """,
                (name, description, user_id)
            )
            new_id = cursor.fetchone()[0]  # 取返回的 id
            return new_id


# 获取字段
def get_fields_by_table_id(table_id):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            cursor.execute(
                "SELECT id, name, type, description, is_active FROM ai_reports_fields WHERE table_id = %s",
                (table_id,),
            )
            return [{"id": row[0], "name": row[1], "type": row[2], "description": row[3], "is_active": row[4]} for row
                    in cursor.fetchall()]


# 新增字段
def add_field(name, type, description, is_active, table_id, user_id):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            cursor.execute(
                "INSERT INTO ai_reports_fields (name,type,description, is_active, create_by, table_id) VALUES (%s, %s, %s, %s, %s, %s) RETURNING id",
                (name, type, description, is_active, user_id, table_id)
            )
            new_id = cursor.fetchone()[0]  # 取返回的 id
            return new_id


# 新增报表智能体
def insert_bot(title: str, description: str, welcome_words: str, ai_personality: str, available_module: str,
               available_report_tables: str, available_kn_bases: str, user_id: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            available_roles = json.dumps(['user'])
            cursor.execute(
                """
                INSERT INTO ai_chat_profiles
                    (available_module,available_roles, title, description, welcome_words, ai_personality, available_report_tables, available_kn_bases, created_by,  created_at)
                VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, now())
                RETURNING id
                """,
                (available_module, available_roles, title, description, welcome_words, ai_personality,
                 available_report_tables, available_kn_bases, user_id)
            )
            report_id = cursor.fetchone()[0]
            return report_id


# 更新报表智能体
def update_bot(id: str, title: str, description: str, welcome_words: str, ai_personality: str, available_module: str,
               available_report_tables: str, available_kn_bases: str, user_id: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            cursor.execute("""
            UPDATE ai_chat_profiles
            SET title = %s,
                description = %s,
                ai_personality = %s,
                welcome_words = %s,
                available_report_tables = %s,
                available_kn_bases = %s,
                available_module = %s,
                updated_at = NOW(),
                updated_by = %s
            WHERE id = %s
            """,
                           (title, description, ai_personality, welcome_words, available_report_tables,
                            available_kn_bases, available_module, user_id, id)
                           )


# ————————————————————————————————————————————————————知识库———————————————————————————————
def get_available_knowledge_bases(available_module: str):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            cursor.execute(
                """
                SELECT id, name, description, is_active
                FROM ai_knowledge
                WHERE available_module::jsonb @> %s::jsonb
                """,
                (f'["{available_module}"]',)
            )

            return [{"id": row[0], "name": row[1], "description": row[2], "is_active": row[3]} for row in
                    cursor.fetchall()]


def add_knowledge_base(name, description, user_id):
    with pg_pool.getConn() as conn:
        with conn.cursor() as cursor:
            cursor.execute(
                """
                INSERT INTO ai_knowledge (name, description, created_by, created_at)
                VALUES (%s, %s, %s, now())
                RETURNING id
                """,
                (name, description, user_id)
            )
            new_id = cursor.fetchone()[0]  # 取返回的 id