import json
import sys
from argparse import ArgumentParser
from pathlib import Path


def read(f: str) -> dict[str, dict]:
  with open(f) as infile:
    next(infile)
    return {
      (d := json.loads(s))["name"]: d
      for line in infile
      if (s := line.strip().strip(",")) != "]"
    }


parser = ArgumentParser(
  prog="DB Merger",
  description="Merge database files",
)
parser.add_argument(
  "-c", "--compare", action="store_true", help="Just do a DB comparison"
)
parser.add_argument(
  "-d", "--pokedex", help="Pokedex file"
)
parser.add_argument(
  "-o", "--output", default="data/latest.db", help="Output database file"
)
parser.add_argument("sources", metavar="file", type=Path, nargs="+")

args = parser.parse_args()

if args.compare:
  left, right = [set(read(s).keys()) for s in args.sources]
  print("Right Missing")
  for d in sorted(left - right):
    print(" ", d)
  print("Left Missing")
  for d in sorted(right - left):
    print(" ", d)
  sys.exit(0)

db = {}
for s in args.sources:
  db.update(read(s))

if args.pokedex is not None:
  with open(args.pokedex) as dex_file:
    dex = json.load(dex_file)
  for name, info in db.items():
    traits = next(
      f["traits"]
      for f in dex[str(info["num"])]["forms"]
      if f["name"] == name
    )
    db[name] = {
      **info,
      "traits": sorted(set([*info["traits"], *traits])),
    }

output = [
  f"  {json.dumps(s)},\n"
  for s in sorted(
    db.values(),
    key=lambda x: (x["num"], x["name"])
  )
]

if args.output == "-":
  for o in output:
    print(o)
else:
  with open(args.output, "w") as outfile:
    outfile.write("const database = [\n")
    outfile.writelines(output)
    outfile.write("]\n")