"""Write task instances to disk for independent solver checks.

Usage: python tools/dump_instances.py OUT_DIR [SEEDS]
Writes OUT_DIR/tasks/<task>/<seed>/{task.txt,app/...} and OUT_DIR/expected.json (keep it away from solvers).
"""

import json
import os
import random
import sys

from terminal_desk.families import FAMILIES, all_task_ids, parse_task_id

out, seeds = sys.argv[1], int(sys.argv[2]) if len(sys.argv) > 2 else 3
expected = {}
for tid in all_task_ids():
    fid, lv, _ = parse_task_id(tid)
    for seed in range(seeds):
        built = FAMILIES[fid].build(lv, random.Random(1000 + seed))
        base = os.path.join(out, "tasks", tid, str(seed))
        for name, content in built.files.items():
            path = os.path.join(base, "app", name)
            os.makedirs(os.path.dirname(path), exist_ok=True)
            if isinstance(content, bytes):
                open(path, "wb").write(content)
            else:
                open(path, "w", encoding="utf-8", newline="").write(content)
        open(os.path.join(base, "task.txt"), "w").write(built.instruction)
        expected[f"{tid}/{seed}"] = {"path": built.artifact.path, "kind": built.artifact.kind, "expected": built.artifact.expected}
json.dump(expected, open(os.path.join(out, "expected.json"), "w"), indent=1, default=str)
print(len(expected), "instances")