"""CLI: dump EPRO2 docs to Std-shaped JSON files for downstream consumers.

The output is "Option 2" per the downstream colleague's spec: Std envelope
with a raw EPRO2 ``objects: {id: payload}`` dict in place of the usual
``shape[]`` tilde-string array. Their ~100-LoC adapter walks ``objects``
and dispatches by ``_type`` to build real Std shapes — see
``docs/sources/epro2_to_std_mapping.md`` for the OPTYPE → Std verb table.

Usage:
    uv run python -m tools.epro2.std <project_dir> --all-pcb --out <dir>
    uv run python -m tools.epro2.std <project_dir> --all-sch --out <dir>
    uv run python -m tools.epro2.std <project_dir> --all     --out <dir>

Output: flat ``<doc_uuid>.json`` per doc — mirrors Std's own data layout
so a downstream pipeline that already iterates ``source/*.json`` works
unchanged.
"""

from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path

from ..replay import Project, replay_project
from .pcb_writer import write_pcb_std
from .sch_writer import write_sch_std


def _dump(payload: dict, out_path: Path, project_uuid: str) -> None:
    payload["result"]["puuid"] = project_uuid or ""
    out_path.write_text(
        json.dumps(payload, ensure_ascii=False, separators=(",", ":")),
        encoding="utf-8",
    )


def _convert_pcbs(proj: Project, out_dir: Path) -> int:
    uuids = [u for u, d in proj.documents.items() if d.doc_type == "PCB"]
    if not uuids:
        return 0
    print(f"PCB: dumping {len(uuids)} doc(s) → {out_dir}")
    for u in uuids:
        try:
            payload = write_pcb_std(proj.documents[u])
        except Exception as e:  # noqa: BLE001
            print(f"  FAIL {u[:12]}: {e}", file=sys.stderr)
            continue
        _dump(payload, out_dir / f"{u}.json", proj.project_uuid or "")
        s = getattr(write_pcb_std, "last_stats", None)
        if s:
            print(
                f"  {u[:12]}.json: objects={s.objects} layers={s.layers_emitted} "
                f"BBox=({s.bbox_x:g},{s.bbox_y:g},{s.bbox_w:g},{s.bbox_h:g})"
            )
    return len(uuids)


def _convert_schs(proj: Project, out_dir: Path) -> int:
    uuids = [u for u, d in proj.documents.items() if d.doc_type == "SCH_PAGE"]
    if not uuids:
        return 0
    print(f"SCH: dumping {len(uuids)} doc(s) → {out_dir}")
    for u in uuids:
        try:
            payload = write_sch_std(proj.documents[u])
        except Exception as e:  # noqa: BLE001
            print(f"  FAIL {u[:12]}: {e}", file=sys.stderr)
            continue
        _dump(payload, out_dir / f"{u}.json", proj.project_uuid or "")
        s = getattr(write_sch_std, "last_stats", None)
        if s:
            print(
                f"  {u[:12]}.json: objects={s.objects} "
                f"BBox=({s.bbox_x:g},{s.bbox_y:g},{s.bbox_w:g},{s.bbox_h:g})"
            )
    return len(uuids)


def main(argv: list[str] | None = None) -> int:
    ap = argparse.ArgumentParser(description="EPRO2 → EasyEDA Std-shaped JSON dump")
    ap.add_argument("project_dir", type=Path)
    g = ap.add_mutually_exclusive_group(required=True)
    g.add_argument("--all-pcb", action="store_true", help="dump every PCB doc")
    g.add_argument("--all-sch", action="store_true", help="dump every SCH_PAGE doc")
    g.add_argument("--all", action="store_true", help="dump both PCB and SCH_PAGE docs")
    ap.add_argument("--out", type=Path, default=Path("data/processed/std_json"))
    args = ap.parse_args(argv)

    proj = replay_project(args.project_dir)
    args.out.mkdir(parents=True, exist_ok=True)

    n = 0
    if args.all_pcb or args.all:
        n += _convert_pcbs(proj, args.out)
    if args.all_sch or args.all:
        n += _convert_schs(proj, args.out)
    if n == 0:
        print("nothing to dump (no PCB / SCH_PAGE docs found)", file=sys.stderr)
        return 1
    return 0


if __name__ == "__main__":
    raise SystemExit(main())