"""Demo script for LangGraph-based trading workflow.

This script demonstrates how to use the LangGraph trading workflow
to orchestrate multi-agent trading analysis.

Usage:
    python demo_langgraph_workflow.py [SYMBOL]

Example:
    python demo_langgraph_workflow.py AAPL
    python demo_langgraph_workflow.py TSLA
"""

import asyncio
import sys
from typing import Any, Dict

from rich.console import Console
from rich.panel import Panel
from rich.table import Table
from rich.tree import Tree

from openclaw.workflow.trading_workflow import TradingWorkflow
from openclaw.workflow.state import get_state_summary

console = Console()


def display_workflow_graph():
    """Display the workflow graph structure."""
    console.print("\n[bold cyan]LangGraph Workflow Structure:[/bold cyan]\n")

    tree = Tree("[bold green]START[/bold green]")

    # Parallel analysis branch
    parallel = tree.add("[yellow]Parallel Analysis Phase[/yellow]")
    parallel.add("MarketAnalysis (Technical)")
    parallel.add("SentimentAnalysis (News/Social)")
    parallel.add("FundamentalAnalysis (Financial)")

    # Sequential phases
    tree.add("BullBearDebate (Generate bull/bear cases)")
    tree.add("DecisionFusion (Combine all signals)")
    tree.add("RiskAssessment (Position sizing & approval)")
    tree.add("[bold red]END[/bold red]")

    console.print(tree)


def display_final_decision(decision: Dict[str, Any]):
    """Display the final trading decision."""
    if not decision:
        console.print("[red]No decision generated[/red]")
        return

    action = decision.get("action", "UNKNOWN")
    confidence = decision.get("confidence", 0.0)
    position_size = decision.get("position_size", 0.0)
    approved = decision.get("approved", False)
    risk_level = decision.get("risk_level", "unknown")
    var_95 = decision.get("var_95", 0.0)

    # Color based on action
    action_color = {
        "BUY": "green",
        "SELL": "red",
        "HOLD": "yellow",
    }.get(action, "white")

    table = Table(title="Final Trading Decision", show_header=False)
    table.add_column("Field", style="cyan")
    table.add_column("Value", style="white")

    table.add_row("Symbol", decision.get("symbol", "N/A"))
    table.add_row("Action", f"[{action_color}]{action}[/{action_color}]")
    table.add_row("Confidence", f"{confidence:.1%}")
    table.add_row("Position Size", f"${position_size:,.2f}")
    table.add_row("Approved", "✓ Yes" if approved else "✗ No")
    table.add_row("Risk Level", risk_level.upper())
    table.add_row("VaR (95%)", f"${var_95:,.2f}")

    console.print(table)

    # Show warnings if any
    warnings = decision.get("warnings", [])
    if warnings:
        console.print("\n[bold yellow]Risk Warnings:[/bold yellow]")
        for warning in warnings:
            console.print(f"  ⚠️  {warning}")


def display_state_summary(state):
    """Display workflow execution summary."""
    summary = get_state_summary(state)

    table = Table(title="Workflow Execution Summary", show_header=False)
    table.add_column("Phase", style="cyan")
    table.add_column("Status", style="green")

    table.add_row("Symbol", summary["symbol"])
    table.add_row("Current Step", summary["current_step"])
    table.add_row("Completed Steps", str(len(summary["completed_steps"])))

    # Reports generated
    table.add_row("Technical Report", "✓" if summary["has_technical"] else "✗")
    table.add_row("Sentiment Report", "✓" if summary["has_sentiment"] else "✗")
    table.add_row("Fundamental Report", "✓" if summary["has_fundamental"] else "✗")
    table.add_row("Bull Report", "✓" if summary["has_bull"] else "✗")
    table.add_row("Bear Report", "✓" if summary["has_bear"] else "✗")
    table.add_row("Fused Decision", "✓" if summary["has_fusion"] else "✗")
    table.add_row("Risk Report", "✓" if summary["has_risk"] else "✗")
    table.add_row("Final Decision", "✓" if summary["has_final"] else "✗")

    if summary["error_count"] > 0:
        table.add_row("Errors", f"[red]{summary['error_count']}[/red]")

    console.print(table)


async def run_demo(symbol: str):
    """Run the LangGraph workflow demo."""
    console.print(Panel.fit(
        f"[bold blue]OpenClaw LangGraph Trading Workflow Demo[/bold blue]\n"
        f"Symbol: [bold green]{symbol}[/bold green]",
        border_style="blue"
    ))

    # Display workflow structure
    display_workflow_graph()

    # Create and run workflow
    console.print(f"\n[bold]Initializing workflow for {symbol}...[/bold]")
    workflow = TradingWorkflow(symbol=symbol, initial_capital=1000.0)

    # Show workflow visualization
    console.print("\n[dim]Workflow Graph (Mermaid):[/dim]")
    console.print(workflow.visualize())

    # Run workflow with progress tracking
    console.print(f"\n[bold cyan]Executing workflow...[/bold cyan]\n")

    async for update in workflow.astream(debug=True):
        # Log state updates
        for node_name, node_state in update.items():
            if isinstance(node_state, dict):
                step = node_state.get("current_step", "unknown")
                console.print(f"  [dim]→ {node_name}: {step}[/dim]")

    # Get final state
    final_state = await workflow.run()

    # Display results
    console.print("\n" + "=" * 60)
    console.print("[bold green]WORKFLOW COMPLETED[/bold green]")
    console.print("=" * 60)

    display_state_summary(final_state)

    # Display final decision
    decision = workflow.get_final_decision(final_state)
    if decision:
        console.print()
        display_final_decision(decision)

    # Show completed steps
    console.print(f"\n[bold]Completed Steps:[/bold]")
    for step in final_state.get("completed_steps", []):
        console.print(f"  ✓ {step}")

    # Show any errors
    errors = final_state.get("errors", [])
    if errors:
        console.print(f"\n[bold red]Errors:[/bold red]")
        for error in errors:
            console.print(f"  ✗ {error}")

    return decision


def main():
    """Main entry point."""
    # Get symbol from command line or use default
    symbol = sys.argv[1] if len(sys.argv) > 1 else "AAPL"

    try:
        decision = asyncio.run(run_demo(symbol))

        # Exit with success
        if decision and decision.get("approved"):
            console.print(f"\n[bold green]✓ Trade approved for {symbol}![/bold green]")
            sys.exit(0)
        else:
            console.print(f"\n[bold yellow]⚠ Trade not approved for {symbol}[/bold yellow]")
            sys.exit(1)

    except Exception as e:
        console.print(f"\n[bold red]Error: {e}[/bold red]")
        import traceback
        console.print(traceback.format_exc())
        sys.exit(2)


if __name__ == "__main__":
    main()