#!/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, fly, mise)"
"""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]
"""

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", "")
    container_dir = Path(__file__).parent.parent / "containers" / top_svc["name"]
    has_dockerfile_only = (
        (container_dir / "Dockerfile").exists()
        and not (container_dir / "container.py").exists()
    )

    if svc_type == "argocd":
        checklist_parts += [
            "\n[bold]ArgoCD Deployment:[/bold]\n",
            "• Update image tag in argocd/manifests/<service>/kustomization.yaml\n",
            f"• Verify sync status: argocd app get {top_svc['name']}\n",
        ]
        if has_dockerfile_only:
            checklist_parts += [
                "\n[bold yellow]Dagger Migration:[/bold yellow]\n",
                "• This container still uses a Dockerfile (no container.py)\n",
                "• Consider migrating to a native Dagger build for better error visibility\n",
                f"• See containers/{top_svc['name']}/Dockerfile\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",
        ]
    elif svc_type == "mise":
        checklist_parts += [
            "\n[bold]Mise Tool Update:[/bold]\n",
            "• Update pinned version in mise.toml\n",
            "• Run: mise install to verify\n",
            "• Check for breaking changes in release notes\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)