"""Simulate complete billing flow."""

import time

import click


@click.command("flow")
@click.option(
    "--type",
    "flow_type",
    type=click.Choice(["customer-lifecycle", "upgrade-flow", "usage-billing"]),
    default="customer-lifecycle",
    help="Type of flow to simulate",
)
@click.option(
    "--interactive",
    is_flag=True,
    help="Interactive mode with step-by-step explanation",
)
@click.option(
    "--verbose",
    is_flag=True,
    help="Show detailed information",
)
@click.option(
    "--output-format",
    type=click.Choice(["text", "markdown"]),
    default="text",
    help="Output format",
)
def flow(
    flow_type: str,
    interactive: bool,
    verbose: bool,
    output_format: str,
) -> None:
    """
    Simulate the complete billing flow without real resources.

    This educational command shows what happens at each step of the
    billing process without making any actual changes.

    Example:
        ai-billing test simulate flow --interactive --explain-each-step
    """
    click.echo(
        click.style(
            "🎭 SIMULATION MODE - No actual changes will be made",
            fg="cyan",
            bold=True,
        )
    )
    click.echo("")

    if flow_type == "customer-lifecycle":
        steps = [
            {
                "title": "Customer signs up in your app",
                "mock_data": {
                    "cognito_user": "user_123",
                    "api_key": "key_mock_abc",
                },
                "description": "Your application creates a Cognito user and API Gateway generates an API key",
            },
            {
                "title": "Customer upgrades via Stripe",
                "mock_data": {
                    "checkout_session": "cs_mock_123",
                    "payment_method": "pm_mock_visa",
                },
                "description": "Customer uses Stripe's hosted checkout to add payment method",
            },
            {
                "title": "System reacts to Stripe event",
                "mock_data": {
                    "event": "checkout.session.completed",
                    "action": "promote_to_metered",
                },
                "description": "EventBridge receives webhook, Lambda promotes API key to metered plan",
            },
            {
                "title": "Usage tracking",
                "mock_data": {
                    "api_calls": 1000,
                    "cost": 10.00,
                },
                "description": "CloudWatch tracks API usage, hourly sync reports to Stripe",
            },
            {
                "title": "Billing and invoicing",
                "mock_data": {
                    "invoice": "inv_mock_123",
                    "amount": 10.00,
                    "status": "paid",
                },
                "description": "Stripe generates invoice and collects payment automatically",
            },
        ]
    elif flow_type == "upgrade-flow":
        steps = [
            {
                "title": "Customer on free plan",
                "mock_data": {"api_key": "key_free", "usage_limit": "10,000/month"},
                "description": "Customer starts with free tier limits",
            },
            {
                "title": "Customer hits limits",
                "mock_data": {"usage": "10,000", "blocked_requests": 42},
                "description": "API Gateway blocks requests after limit",
            },
            {
                "title": "Customer upgrades",
                "mock_data": {"checkout_url": "https://checkout.stripe.com/xxx"},
                "description": "Customer clicks upgrade, redirected to Stripe",
            },
            {
                "title": "Payment confirmed",
                "mock_data": {"event": "payment_method.attached"},
                "description": "Stripe confirms payment method added",
            },
            {
                "title": "Plan updated",
                "mock_data": {"new_plan": "metered", "limits": "unlimited"},
                "description": "API key moved to metered plan, limits removed",
            },
        ]
    else:  # usage-billing
        steps = [
            {
                "title": "API calls made",
                "mock_data": {"endpoint": "/api/test", "count": 100},
                "description": "Customer makes API calls throughout the hour",
            },
            {
                "title": "CloudWatch aggregates",
                "mock_data": {"metric": "ApiUsageCount", "value": 100},
                "description": "API Gateway logs usage to CloudWatch",
            },
            {
                "title": "Hourly sync triggered",
                "mock_data": {"schedule": "rate(1 hour)"},
                "description": "EventBridge triggers usage sync Lambda",
            },
            {
                "title": "Usage reported to Stripe",
                "mock_data": {"quantity": 100, "timestamp": "2025-01-01T12:00:00Z"},
                "description": "Lambda reports usage with idempotency key",
            },
            {
                "title": "Invoice generated",
                "mock_data": {"line_item": "100 API calls @ $0.001", "total": 0.10},
                "description": "Stripe adds usage to upcoming invoice",
            },
        ]

    # Display simulation
    for i, step in enumerate(steps, 1):
        if output_format == "markdown":
            click.echo(f"### Step {i}: {step['title']}")
            click.echo(f"\n{step['description']}\n")
            click.echo("```json")
            mock_data = step["mock_data"]
            if isinstance(mock_data, dict):
                for key, value in mock_data.items():
                    click.echo(f'  "{key}": "{value}"')
            click.echo("```\n")
        else:
            click.echo(f"Step {i}: {step['title']}")
            mock_data = step["mock_data"]
            if isinstance(mock_data, dict):
                for key, value in mock_data.items():
                    click.echo(f"  \u2192 Mock {key}: {value}")
            if verbose:
                click.echo(f"  INFO: {step['description']}")
            click.echo("")

        if interactive:
            if i < len(steps) and not click.confirm("Continue to next step?"):
                break
            time.sleep(0.5)  # Brief pause for readability

    click.echo(
        click.style(
            "✅ Simulation complete - no actual resources were created or modified",
            fg="green",
        )
    )


__all__ = ["flow"]
