"""
D1 Database integration for OpenManus
Provides interface to Cloudflare D1 database operations
"""

from typing import Any, Dict, List, Optional, Union

from app.logger import logger

from .client import CloudflareClient, CloudflareError


class D1Database:
    """Cloudflare D1 Database client"""

    def __init__(self, client: CloudflareClient, database_id: str):
        self.client = client
        self.database_id = database_id
        self.base_endpoint = f"accounts/{client.account_id}/d1/database/{database_id}"

    async def execute_query(
        self, sql: str, params: Optional[List[Any]] = None, use_worker: bool = True
    ) -> Dict[str, Any]:
        """Execute a SQL query"""

        query_data = {"sql": sql}

        if params:
            query_data["params"] = params

        try:
            if use_worker:
                # Use worker endpoint for better performance
                response = await self.client.post(
                    "api/database/query", data=query_data, use_worker=True
                )
            else:
                # Use Cloudflare API directly
                response = await self.client.post(
                    f"{self.base_endpoint}/query", data=query_data
                )

            return response

        except CloudflareError as e:
            logger.error(f"D1 query execution failed: {e}")
            raise

    async def batch_execute(
        self, queries: List[Dict[str, Any]], use_worker: bool = True
    ) -> Dict[str, Any]:
        """Execute multiple queries in a batch"""

        batch_data = {"queries": queries}

        try:
            if use_worker:
                response = await self.client.post(
                    "api/database/batch", data=batch_data, use_worker=True
                )
            else:
                response = await self.client.post(
                    f"{self.base_endpoint}/query", data=batch_data
                )

            return response

        except CloudflareError as e:
            logger.error(f"D1 batch execution failed: {e}")
            raise

    # User management methods
    async def create_user(
        self,
        user_id: str,
        username: str,
        email: Optional[str] = None,
        metadata: Optional[Dict[str, Any]] = None,
    ) -> Dict[str, Any]:
        """Create a new user"""

        sql = """
        INSERT INTO users (id, username, email, metadata)
        VALUES (?, ?, ?, ?)
        ON CONFLICT(id) DO UPDATE SET
        username = excluded.username,
        email = excluded.email,
        metadata = excluded.metadata,
        updated_at = strftime('%s', 'now')
        """

        import json

        params = [user_id, username, email, json.dumps(metadata or {})]

        return await self.execute_query(sql, params)

    async def get_user(self, user_id: str) -> Optional[Dict[str, Any]]:
        """Get user by ID"""

        sql = "SELECT * FROM users WHERE id = ?"
        params = [user_id]

        result = await self.execute_query(sql, params)

        # Parse response based on Cloudflare D1 format
        if result.get("success") and result.get("result"):
            rows = result["result"][0].get("results", [])
            if rows:
                user = rows[0]
                if user.get("metadata"):
                    import json

                    user["metadata"] = json.loads(user["metadata"])
                return user

        return None

    async def get_user_by_username(self, username: str) -> Optional[Dict[str, Any]]:
        """Get user by username"""

        sql = "SELECT * FROM users WHERE username = ?"
        params = [username]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            rows = result["result"][0].get("results", [])
            if rows:
                user = rows[0]
                if user.get("metadata"):
                    import json

                    user["metadata"] = json.loads(user["metadata"])
                return user

        return None

    # Session management methods
    async def create_session(
        self,
        session_id: str,
        user_id: str,
        session_data: Dict[str, Any],
        expires_at: Optional[int] = None,
    ) -> Dict[str, Any]:
        """Create a new session"""

        sql = """
        INSERT INTO sessions (id, user_id, session_data, expires_at)
        VALUES (?, ?, ?, ?)
        """

        import json

        params = [session_id, user_id, json.dumps(session_data), expires_at]

        return await self.execute_query(sql, params)

    async def get_session(self, session_id: str) -> Optional[Dict[str, Any]]:
        """Get session by ID"""

        sql = """
        SELECT * FROM sessions
        WHERE id = ? AND (expires_at IS NULL OR expires_at > strftime('%s', 'now'))
        """
        params = [session_id]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            rows = result["result"][0].get("results", [])
            if rows:
                session = rows[0]
                if session.get("session_data"):
                    import json

                    session["session_data"] = json.loads(session["session_data"])
                return session

        return None

    async def delete_session(self, session_id: str) -> Dict[str, Any]:
        """Delete a session"""

        sql = "DELETE FROM sessions WHERE id = ?"
        params = [session_id]

        return await self.execute_query(sql, params)

    # Conversation methods
    async def create_conversation(
        self,
        conversation_id: str,
        user_id: str,
        title: Optional[str] = None,
        messages: Optional[List[Dict[str, Any]]] = None,
    ) -> Dict[str, Any]:
        """Create a new conversation"""

        sql = """
        INSERT INTO conversations (id, user_id, title, messages)
        VALUES (?, ?, ?, ?)
        """

        import json

        params = [conversation_id, user_id, title, json.dumps(messages or [])]

        return await self.execute_query(sql, params)

    async def get_conversation(self, conversation_id: str) -> Optional[Dict[str, Any]]:
        """Get conversation by ID"""

        sql = "SELECT * FROM conversations WHERE id = ?"
        params = [conversation_id]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            rows = result["result"][0].get("results", [])
            if rows:
                conversation = rows[0]
                if conversation.get("messages"):
                    import json

                    conversation["messages"] = json.loads(conversation["messages"])
                return conversation

        return None

    async def update_conversation_messages(
        self, conversation_id: str, messages: List[Dict[str, Any]]
    ) -> Dict[str, Any]:
        """Update conversation messages"""

        sql = """
        UPDATE conversations
        SET messages = ?, updated_at = strftime('%s', 'now')
        WHERE id = ?
        """

        import json

        params = [json.dumps(messages), conversation_id]

        return await self.execute_query(sql, params)

    async def get_user_conversations(
        self, user_id: str, limit: int = 50
    ) -> List[Dict[str, Any]]:
        """Get user's conversations"""

        sql = """
        SELECT id, user_id, title, created_at, updated_at
        FROM conversations
        WHERE user_id = ?
        ORDER BY updated_at DESC
        LIMIT ?
        """
        params = [user_id, limit]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            return result["result"][0].get("results", [])

        return []

    # Agent execution methods
    async def create_agent_execution(
        self,
        execution_id: str,
        user_id: str,
        session_id: Optional[str] = None,
        task_description: Optional[str] = None,
        status: str = "pending",
    ) -> Dict[str, Any]:
        """Create a new agent execution record"""

        sql = """
        INSERT INTO agent_executions (id, user_id, session_id, task_description, status)
        VALUES (?, ?, ?, ?, ?)
        """

        params = [execution_id, user_id, session_id, task_description, status]

        return await self.execute_query(sql, params)

    async def update_agent_execution(
        self,
        execution_id: str,
        status: Optional[str] = None,
        result: Optional[str] = None,
        execution_time: Optional[int] = None,
    ) -> Dict[str, Any]:
        """Update agent execution record"""

        updates = []
        params = []

        if status:
            updates.append("status = ?")
            params.append(status)

        if result:
            updates.append("result = ?")
            params.append(result)

        if execution_time is not None:
            updates.append("execution_time = ?")
            params.append(execution_time)

        if status in ["completed", "failed"]:
            updates.append("completed_at = strftime('%s', 'now')")

        if not updates:
            return {"success": True, "message": "No updates provided"}

        sql = f"""
        UPDATE agent_executions
        SET {', '.join(updates)}
        WHERE id = ?
        """
        params.append(execution_id)

        return await self.execute_query(sql, params)

    async def get_agent_execution(self, execution_id: str) -> Optional[Dict[str, Any]]:
        """Get agent execution by ID"""

        sql = "SELECT * FROM agent_executions WHERE id = ?"
        params = [execution_id]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            rows = result["result"][0].get("results", [])
            if rows:
                return rows[0]

        return None

    async def get_user_executions(
        self, user_id: str, limit: int = 50
    ) -> List[Dict[str, Any]]:
        """Get user's agent executions"""

        sql = """
        SELECT * FROM agent_executions
        WHERE user_id = ?
        ORDER BY created_at DESC
        LIMIT ?
        """
        params = [user_id, limit]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            return result["result"][0].get("results", [])

        return []

    # File record methods
    async def create_file_record(
        self,
        file_id: str,
        user_id: str,
        filename: str,
        file_key: str,
        file_size: int,
        content_type: str,
        bucket: str = "storage",
    ) -> Dict[str, Any]:
        """Create a file record"""

        sql = """
        INSERT INTO files (id, user_id, filename, file_key, file_size, content_type, bucket)
        VALUES (?, ?, ?, ?, ?, ?, ?)
        """

        params = [file_id, user_id, filename, file_key, file_size, content_type, bucket]

        return await self.execute_query(sql, params)

    async def get_file_record(self, file_id: str) -> Optional[Dict[str, Any]]:
        """Get file record by ID"""

        sql = "SELECT * FROM files WHERE id = ?"
        params = [file_id]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            rows = result["result"][0].get("results", [])
            if rows:
                return rows[0]

        return None

    async def get_user_files(
        self, user_id: str, limit: int = 100
    ) -> List[Dict[str, Any]]:
        """Get user's files"""

        sql = """
        SELECT * FROM files
        WHERE user_id = ?
        ORDER BY created_at DESC
        LIMIT ?
        """
        params = [user_id, limit]

        result = await self.execute_query(sql, params)

        if result.get("success") and result.get("result"):
            return result["result"][0].get("results", [])

        return []

    async def delete_file_record(self, file_id: str) -> Dict[str, Any]:
        """Delete a file record"""

        sql = "DELETE FROM files WHERE id = ?"
        params = [file_id]

        return await self.execute_query(sql, params)

    # Schema initialization
    async def initialize_schema(self) -> Dict[str, Any]:
        """Initialize database schema"""

        schema_queries = [
            {
                "sql": """CREATE TABLE IF NOT EXISTS users (
                    id TEXT PRIMARY KEY,
                    username TEXT UNIQUE NOT NULL,
                    email TEXT UNIQUE,
                    created_at INTEGER DEFAULT (strftime('%s', 'now')),
                    updated_at INTEGER DEFAULT (strftime('%s', 'now')),
                    metadata TEXT
                )"""
            },
            {
                "sql": """CREATE TABLE IF NOT EXISTS sessions (
                    id TEXT PRIMARY KEY,
                    user_id TEXT NOT NULL,
                    session_data TEXT,
                    created_at INTEGER DEFAULT (strftime('%s', 'now')),
                    expires_at INTEGER,
                    FOREIGN KEY (user_id) REFERENCES users(id)
                )"""
            },
            {
                "sql": """CREATE TABLE IF NOT EXISTS conversations (
                    id TEXT PRIMARY KEY,
                    user_id TEXT NOT NULL,
                    title TEXT,
                    messages TEXT,
                    created_at INTEGER DEFAULT (strftime('%s', 'now')),
                    updated_at INTEGER DEFAULT (strftime('%s', 'now')),
                    FOREIGN KEY (user_id) REFERENCES users(id)
                )"""
            },
            {
                "sql": """CREATE TABLE IF NOT EXISTS files (
                    id TEXT PRIMARY KEY,
                    user_id TEXT NOT NULL,
                    filename TEXT NOT NULL,
                    file_key TEXT NOT NULL,
                    file_size INTEGER,
                    content_type TEXT,
                    bucket TEXT DEFAULT 'storage',
                    created_at INTEGER DEFAULT (strftime('%s', 'now')),
                    FOREIGN KEY (user_id) REFERENCES users(id)
                )"""
            },
            {
                "sql": """CREATE TABLE IF NOT EXISTS agent_executions (
                    id TEXT PRIMARY KEY,
                    user_id TEXT NOT NULL,
                    session_id TEXT,
                    task_description TEXT,
                    status TEXT DEFAULT 'pending',
                    result TEXT,
                    execution_time INTEGER,
                    created_at INTEGER DEFAULT (strftime('%s', 'now')),
                    completed_at INTEGER,
                    FOREIGN KEY (user_id) REFERENCES users(id)
                )"""
            },
        ]

        # Add indexes
        index_queries = [
            {
                "sql": "CREATE INDEX IF NOT EXISTS idx_sessions_user_id ON sessions(user_id)"
            },
            {
                "sql": "CREATE INDEX IF NOT EXISTS idx_conversations_user_id ON conversations(user_id)"
            },
            {"sql": "CREATE INDEX IF NOT EXISTS idx_files_user_id ON files(user_id)"},
            {
                "sql": "CREATE INDEX IF NOT EXISTS idx_agent_executions_user_id ON agent_executions(user_id)"
            },
        ]

        all_queries = schema_queries + index_queries

        return await self.batch_execute(all_queries)