#!/usr/bin/env python3
"""Jump-distance route between two planets/systems, from FIO's system graph (not PRUNplanner,
which doesn't model travel). Straight-line ly is the Dijkstra weight (scales with FTL fuel/time);
jump count shown alongside.

  tools/route.py ZV-759c ZV-194a      # Deimos -> Nike
  tools/route.py Deimos "Ironforge"   # names also work
"""
import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
from puga import route


def main():
    if len(sys.argv) != 3:
        sys.exit("usage: tools/route.py <from planet/system> <to planet/system>")
    a, b = sys.argv[1], sys.argv[2]
    src = route.resolve_system(a)
    dst = route.resolve_system(b)
    if src == dst:
        print(f"{a} and {b} are in the same system - 0 jumps")
        return
    r = route.shortest_path(src, dst)
    if r is None:
        print(f"no connected route found between {a} and {b}")
        return
    print(f"{a} -> {b}: {r['jumps']} jumps, {r['distance_ly']:.1f} ly (straight-line sum along the jump path)")
    print("path: " + " -> ".join(r["path"]))


if __name__ == "__main__":
    main()