# Copyright (c) 2025 Patrick Motsch
# All rights reserved.

"""
Create Excel Content action for JIRA operations.
Creates Excel content with custom headers.
"""

import logging
import json
import base64
import pandas as pd
import csv as csv_module
from io import BytesIO
from datetime import datetime, UTC
from typing import Dict, Any
from modules.workflows.methods.methodBase import action
from modules.datamodels.datamodelChat import ActionResult, ActionDocument

logger = logging.getLogger(__name__)

@action
async def createExcelContent(self, parameters: Dict[str, Any]) -> ActionResult:
    """
    Create Excel content with custom headers.
    
    Parameters:
    - data (str, required): Document reference containing data as JSON (with "data" field from mergeTicketData)
    - headers (str, optional): Document reference containing headers JSON (from parseExcelContent)
    - columns (str or list, optional): List of column names (if not provided, extracted from taskSyncDefinition or data)
    - taskSyncDefinition (str or dict, optional): Field mapping definition (used to extract column names if columns not provided)
    
    Returns:
    - ActionResult with ActionDocument containing Excel content as bytes
    """
    try:
        dataParam = parameters.get("data")
        if not dataParam:
            return ActionResult.isFailure(error="data parameter is required")
        
        headersParam = parameters.get("headers")
        columnsParam = parameters.get("columns")
        taskSyncDefinitionParam = parameters.get("taskSyncDefinition")
        
        # Get data from document
        dataJson = self.documentParsing.parseJsonFromDocument(dataParam)
        if dataJson is None:
            return ActionResult.isFailure(error="Could not parse data from document reference")
        
        # Extract data array if wrapped in object
        if isinstance(dataJson, dict) and "data" in dataJson:
            dataList = dataJson["data"]
        elif isinstance(dataJson, list):
            dataList = dataJson
        else:
            return ActionResult.isFailure(error="Data must be a JSON array or object with 'data' field")
        
        # Get headers
        headers = {"header1": "Header 1", "header2": "Header 2"}
        if headersParam:
            headersJson = self.documentParsing.parseJsonFromDocument(headersParam)
            if headersJson and isinstance(headersJson, dict) and "headers" in headersJson:
                headers = headersJson["headers"]
            elif headersJson and isinstance(headersJson, dict):
                headers = headersJson
        
        # Get columns
        if columnsParam:
            if isinstance(columnsParam, str):
                try:
                    columns = json.loads(columnsParam) if columnsParam.startswith('[') or columnsParam.startswith('{') else columnsParam.split(',')
                except:
                    columns = columnsParam.split(',')
            elif isinstance(columnsParam, list):
                columns = columnsParam
            else:
                columns = None
        elif taskSyncDefinitionParam:
            # Extract columns from taskSyncDefinition
            if isinstance(taskSyncDefinitionParam, str):
                taskSyncDefinition = json.loads(taskSyncDefinitionParam)
            else:
                taskSyncDefinition = taskSyncDefinitionParam
            columns = list(taskSyncDefinition.keys())
        elif dataList and len(dataList) > 0:
            columns = list(dataList[0].keys())
        else:
            columns = []
        
        # Create DataFrame
        if not dataList:
            df = pd.DataFrame(columns=columns)
        else:
            df = pd.DataFrame(dataList)
            # Ensure all columns exist
            for col in columns:
                if col not in df.columns:
                    df[col] = ""
            # Reorder columns
            df = df[columns]
        
        # Clean data
        for column in df.columns:
            df[column] = df[column].astype("object").fillna("")
            df[column] = df[column].astype(str).str.replace('\n', '\\n', regex=False).str.replace('"', '""', regex=False)
        
        # Create headers with timestamp
        timestamp = datetime.fromtimestamp(self.services.utils.timestampGetUtc(), UTC).strftime("%Y-%m-%d %H:%M:%S UTC")
        header1Row = next(csv_module.reader([headers.get("header1", "Header 1")]), [])
        header2Row = next(csv_module.reader([headers.get("header2", "Header 2")]), [])
        if len(header2Row) > 1:
            header2Row[1] = timestamp
        
        headerRow1 = pd.DataFrame([header1Row + [""] * (len(df.columns) - len(header1Row))], columns=df.columns)
        headerRow2 = pd.DataFrame([header2Row + [""] * (len(df.columns) - len(header2Row))], columns=df.columns)
        tableHeaders = pd.DataFrame([df.columns.tolist()], columns=df.columns)
        finalDf = pd.concat([headerRow1, headerRow2, tableHeaders, df], ignore_index=True)
        
        # Convert to Excel bytes
        buf = BytesIO()
        finalDf.to_excel(buf, index=False, header=False, engine='openpyxl')
        excelBytes = buf.getvalue()
        
        logger.info(f"Created Excel content: {len(dataList)} rows, {len(columns)} columns")
        
        # Generate filename
        workflowContext = self.services.chat.getWorkflowContext() if hasattr(self.services, 'chat') else None
        filename = self._generateMeaningfulFileName(
            "ticket_sync",
            "xlsx",
            workflowContext,
            "createExcelContent"
        )
        
        validationMetadata = self._createValidationMetadata(
            "createExcelContent",
            rowCount=len(dataList),
            columnCount=len(columns)
        )
        
        # Store as base64 for document
        excelBase64 = base64.b64encode(excelBytes).decode('utf-8')
        
        document = ActionDocument(
            documentName=filename,
            documentData=excelBase64,
            mimeType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
            validationMetadata=validationMetadata
        )
        
        return ActionResult.isSuccess(documents=[document])
        
    except Exception as e:
        errorMsg = f"Error creating Excel content: {str(e)}"
        logger.error(errorMsg)
        return ActionResult.isFailure(error=errorMsg)