#!/usr/bin/env -S uv run --script
# /// script
# requires-python = ">=3.12"
# dependencies = ["pyyaml>=6.0.2", "rich>=14.0.0", "typer>=0.24.0"]
# ///
#MISE description="Review the most stale service for version freshness"
#USAGE flag "--limit <limit>" default="15" help="Number of services to show in the table"
#USAGE flag "--type <type>" help="Filter by service type (argocd, ansible, nixos)"
"""Review the most stale service for version freshness.

Reads ``docs/reference/services/service-versions.yaml`` and sorts services
by the ``last-reviewed`` field. Services without the field (or null) are
treated as never-reviewed and float to the top. Displays a staleness table
and then shows the most stale service with a review checklist.

After reviewing, update the service entry in the YAML file:

    last-reviewed: YYYY-MM-DD
    current-version: "x.y.z"

Usage: mise run service-review [-- --limit 15] [-- --type argocd]
"""

import sys
from datetime import date
from pathlib import Path
from typing import Annotated

import typer
import yaml
from rich.console import Console
from rich.panel import Panel
from rich.table import Table

VERSIONS_FILE = Path(__file__).parent.parent / "service-versions.yaml"


def load_services(path: Path) -> list[dict]:
    """Load services from the YAML tracking file."""
    data = yaml.safe_load(path.read_text())
    return data.get("services", [])


def parse_date(raw) -> date | None:
    """Parse a date value from YAML."""
    if raw is None:
        return None
    if isinstance(raw, date):
        return raw
    try:
        return date.fromisoformat(str(raw))
    except ValueError:
        return None


def main(
    limit: Annotated[int, typer.Option(help="Number of services to show in the table")] = 15,
    type: Annotated[str | None, typer.Option(help="Filter by service type (argocd, ansible, nixos)")] = None,
) -> None:
    console = Console()
    today = date.today()

    if not VERSIONS_FILE.exists():
        console.print(f"[bold red]Tracking file not found:[/bold red] {VERSIONS_FILE}")
        raise typer.Exit(code=1)

    services = load_services(VERSIONS_FILE)

    if type:
        services = [s for s in services if s.get("type") == type]
        if not services:
            console.print(f"[bold red]No services found with type '{type}'[/bold red]")
            raise typer.Exit(code=1)

    # Parse dates and build sortable entries
    entries: list[tuple[dict, date | None]] = []
    for svc in services:
        reviewed = parse_date(svc.get("last-reviewed"))
        entries.append((svc, reviewed))

    # Sort: never-reviewed first (None), then oldest reviewed
    entries.sort(key=lambda e: (e[1] is not None, e[1] or date.min))

    never_reviewed = sum(1 for _, r in entries if r is None)
    type_label = f" ({type})" if type else ""

    # --- Summary panel ---
    console.print()
    console.print(Panel(
        f"[bold]{len(entries)}[/bold] total services{type_label}, "
        f"[bold red]{never_reviewed}[/bold red] never reviewed",
        title="[bold]Service Review Queue[/bold]",
        border_style="cyan",
    ))
    console.print()

    # --- Staleness table ---
    table = Table(show_header=True, header_style="bold")
    table.add_column("#", justify="right")
    table.add_column("Service")
    table.add_column("Type", justify="center")
    table.add_column("Version")
    table.add_column("Last Reviewed", justify="right")
    table.add_column("Age (days)", justify="right")

    for i, (svc, reviewed) in enumerate(entries[:limit], 1):
        name = svc["name"]
        svc_type = svc.get("type", "?")
        version = svc.get("current-version") or "—"

        if reviewed is None:
            table.add_row(
                str(i),
                f"[red]{name}[/red]",
                svc_type,
                f"[dim]{version}[/dim]",
                "[red]never[/red]",
                "[red]—[/red]",
            )
        else:
            age = (today - reviewed).days
            style = "yellow" if age > 90 else ""
            name_str = f"[{style}]{name}[/{style}]" if style else name
            date_str = f"[{style}]{reviewed}[/{style}]" if style else str(reviewed)
            age_str = f"[{style}]{age}[/{style}]" if style else str(age)
            table.add_row(str(i), name_str, svc_type, version, date_str, age_str)

    remaining = len(entries) - limit
    if remaining > 0:
        table.add_row("", f"[dim]… {remaining} more[/dim]", "", "", "", "")

    console.print(table)
    console.print()

    # --- Show the most stale service ---
    if not entries:
        console.print("[bold red]No services found![/bold red]")
        raise typer.Exit(code=1)

    top_svc, top_reviewed = entries[0]
    upstream = top_svc.get("upstream-source") or "N/A"
    notes = top_svc.get("notes") or ""

    detail_lines = [
        f"[bold cyan]{top_svc['name']}[/bold cyan]  [dim]({top_svc.get('type', '?')})[/dim]",
        f"[dim]Last reviewed: {top_reviewed or 'never'}[/dim]",
        f"[dim]Current version: {top_svc.get('current-version') or 'unknown'}[/dim]",
        f"[dim]Upstream: {upstream}[/dim]",
    ]
    if notes:
        detail_lines.append(f"[dim]Notes: {notes}[/dim]")

    console.print(Panel(
        "\n".join(detail_lines),
        title="[bold]Up For Review[/bold]",
        border_style="green",
    ))
    console.print()

    # --- Review checklist ---
    checklist_parts = [
        "[bold]Version Check:[/bold]\n",
        f"• Check upstream releases: {upstream}\n",
        "• Compare upstream latest to current deployed version\n",
        "• Review changelog for breaking changes or security fixes\n",
    ]

    svc_type = top_svc.get("type", "")
    if svc_type == "argocd":
        checklist_parts += [
            "\n[bold]ArgoCD Deployment:[/bold]\n",
            "• Update image tag or Helm chart version in argocd/manifests/\n",
            f"• Verify sync status: argocd app get {top_svc['name']}\n",
        ]
    elif svc_type == "ansible":
        checklist_parts += [
            "\n[bold]Ansible Deployment:[/bold]\n",
            f"• Check role vars for version pins: ansible/roles/{top_svc['name']}/\n",
            f"• Dry run: mise run provision-indri -- --tags {top_svc['name']} --check --diff\n",
        ]
    elif svc_type == "nixos":
        checklist_parts += [
            "\n[bold]NixOS Deployment:[/bold]\n",
            "• Version tracks nixpkgs via flake.lock\n",
            "• Update: dagger call flake-update --src=. export --path=nixos/ringtail/flake.lock\n",
            "• Deploy: mise run provision-ringtail\n",
        ]

    checklist_parts += [
        "\n[bold]Health Check:[/bold]\n",
        "• Verify the service is running and healthy\n",
        "• Check logs for errors or warnings\n",
        "\n[bold]After Review:[/bold]\n",
        "• Update the tracking file: [cyan]docs/reference/services/service-versions.yaml[/cyan]\n",
        f"• Set [cyan]last-reviewed: {today}[/cyan] and [cyan]current-version[/cyan]\n",
        "• Commit the change (along with any upgrades)",
    ]

    console.print(Panel(
        "".join(checklist_parts),
        title="[bold yellow]Review Guidance[/bold yellow]",
        border_style="yellow",
    ))


if __name__ == "__main__":
    typer.run(main)