from loguru import logger

from api.db import db_client
from api.enums import WorkflowRunMode
from api.services.pricing.cost_calculator import cost_calculator
from api.services.telephony.factory import get_telephony_provider
from pipecat.utils.context import set_current_run_id


async def calculate_workflow_run_cost(ctx, workflow_run_id: int):
    # Set the run_id in context variable for consistent logging format
    set_current_run_id(workflow_run_id)
    logger.debug("Calculating cost for workflow run")

    workflow_run = await db_client.get_workflow_run_by_id(workflow_run_id)
    if not workflow_run:
        logger.warning("Workflow run not found")
        return

    workflow_usage_info = workflow_run.usage_info
    if not workflow_usage_info:
        logger.warning("No usage info available for workflow run")
        return

    try:
        # Calculate cost breakdown
        cost_breakdown = cost_calculator.calculate_total_cost(workflow_usage_info)

        # Fetch telephony call cost for both Twilio and Vonage
        telephony_cost_usd = 0.0
        if workflow_run.mode in [WorkflowRunMode.TWILIO.value, WorkflowRunMode.VONAGE.value] and workflow_run.cost_info:
            # Get the call ID (provider-agnostic approach with backward compatibility)
            call_id = workflow_run.cost_info.get("call_id")
            
            # Fallback to legacy provider-specific fields if needed
            if not call_id:
                if workflow_run.mode == WorkflowRunMode.TWILIO.value:
                    call_id = workflow_run.cost_info.get("twilio_call_sid")
                elif workflow_run.mode == WorkflowRunMode.VONAGE.value:
                    call_id = workflow_run.cost_info.get("vonage_call_uuid")
            
            # Provider name is derived from workflow run mode
            provider_name = workflow_run.mode.lower() if workflow_run.mode else ""
            
            if call_id:
                try:
                    # Get workflow to access organization_id
                    workflow = await db_client.get_workflow_by_id(
                        workflow_run.workflow_id
                    )
                    if not workflow:
                        logger.warning("Workflow not found for workflow run")
                        raise Exception("Workflow not found")

                    # Use telephony provider abstraction
                    provider = await get_telephony_provider(workflow.organization_id)
                    call_cost_info = await provider.get_call_cost(call_id)
                    
                    if call_cost_info.get("status") != "error":
                        telephony_cost_usd = call_cost_info.get("cost_usd", 0.0)
                        cost_breakdown["telephony_call"] = telephony_cost_usd
                        cost_breakdown[f"{provider_name}_call"] = telephony_cost_usd  # Keep backward compatibility
                        
                        # Add telephony cost to the total
                        cost_breakdown["total"] = (
                            float(cost_breakdown["total"]) + telephony_cost_usd
                        )
                        logger.info(
                            f"{provider_name.title()} call cost: ${telephony_cost_usd:.6f} USD for call {call_id}"
                        )
                    else:
                        logger.error(f"Failed to fetch {provider_name} call cost: {call_cost_info.get('error')}")
                        
                except Exception as e:
                    logger.error(f"Failed to fetch telephony call cost: {e}")
                    # Don't fail the whole cost calculation if telephony API fails

        # Store cost information back to the workflow run
        # We'll add the cost breakdown to the workflow run
        # Convert USD to Dograh Tokens (1 cent = 1 token)
        dograh_tokens = round(float(cost_breakdown["total"]) * 100, 2)

        # Get organization to check if it has USD pricing
        org = None
        charge_usd = None
        if (
            workflow_run.workflow
            and workflow_run.workflow.user
            and workflow_run.workflow.user.selected_organization_id
        ):
            org = await db_client.get_organization_by_id(
                workflow_run.workflow.user.selected_organization_id
            )

        # Calculate USD cost if organization has pricing configured
        if org and org.price_per_second_usd:
            duration_seconds = workflow_usage_info.get("call_duration_seconds", 0)
            charge_usd = duration_seconds * org.price_per_second_usd

        cost_info = {
            "cost_breakdown": cost_breakdown,
            "total_cost_usd": float(cost_breakdown["total"]),
            "dograh_token_usage": dograh_tokens,
            "calculated_at": workflow_run.created_at.isoformat(),
            "call_duration_seconds": workflow_usage_info["call_duration_seconds"],
        }

        # Add USD cost if available
        if charge_usd is not None:
            cost_info["charge_usd"] = charge_usd
            cost_info["price_per_second_usd"] = org.price_per_second_usd

        # Preserve call ID (provider-agnostic with backward compatibility)
        if workflow_run.cost_info:
            # Preserve generic call_id if it exists
            if "call_id" in workflow_run.cost_info:
                cost_info["call_id"] = workflow_run.cost_info["call_id"]
            # Also preserve legacy fields for backward compatibility
            elif "twilio_call_sid" in workflow_run.cost_info:
                cost_info["twilio_call_sid"] = workflow_run.cost_info["twilio_call_sid"]
            elif "vonage_call_uuid" in workflow_run.cost_info:
                cost_info["vonage_call_uuid"] = workflow_run.cost_info["vonage_call_uuid"]

        # Update workflow run with cost information
        await db_client.update_workflow_run(run_id=workflow_run_id, cost_info=cost_info)

        # Update organization usage if applicable
        if org:
            org_id = org.id
            try:
                duration_seconds = workflow_usage_info.get("call_duration_seconds", 0)
                # Pass USD amount if organization has pricing
                await db_client.update_usage_after_run(
                    org_id, dograh_tokens, duration_seconds, charge_usd
                )
                if charge_usd is not None:
                    logger.info(
                        f"Updated organization usage with ${charge_usd:.2f} USD ({dograh_tokens} Dograh Tokens) and {duration_seconds}s duration for org {org_id}"
                    )
                else:
                    logger.info(
                        f"Updated organization usage with {dograh_tokens} Dograh Tokens and {duration_seconds}s duration for org {org_id}"
                    )
            except Exception as e:
                logger.error(
                    f"Failed to update organization usage for org {org_id}: {e}"
                )
                # Don't fail the whole task if usage update fails

        logger.info(
            f"Calculated cost for workflow run: ${cost_breakdown['total']:.6f} USD ({dograh_tokens} Dograh Tokens)"
        )

    except Exception as e:
        logger.error(f"Error calculating cost for workflow run: {e}")
        raise