#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
run_enrichment.py — enrichment orchestrator (plan Part B3).

Mirror of run_extraction.py, on the *other* side of the rebuild. It reads the
already-rebuilt data/activities.db, and for every activity emits one subagent
prompt asking for a single bilingual + inferred-filter enrichment pass. Like
extraction, this script does NOT call the LLM — the interactive Claude Code
orchestrator launches waves of subagents on the emitted prompts.

Keying is the crux (plan §"Cheia de keying"): each row's overlay is keyed on
import_common.content_key(normalized_name, language, _normalize_text(description))
— the SAME function build_database uses to apply the overlay. The key is stable
only while the extraction text is frozen, so enrichment runs AFTER the freezing
rebuild.

Modes:
  (default)    emit one prompt per activity that has no enrichment part yet
               (resumable: data/enrichment_parts/<key>.json present => skip)
  --collect    merge data/enrichment_parts/*.json -> data/enrichment.json

Pilot scoping (plan B5): --source <source_id substring> and/or --limit N narrow
the emitted prompts to a single source / category for the sign-off pilot.

Usage:
    python scripts/run_enrichment.py --source teambuilding_corbu        # pilot
    python scripts/run_enrichment.py                                    # all rows
    python scripts/run_enrichment.py --collect                          # merge parts
"""

from __future__ import annotations

import argparse
import json
import sqlite3
import sys
from pathlib import Path
from typing import Optional

SCRIPT_DIR = Path(__file__).resolve().parent
REPO_ROOT = SCRIPT_DIR.parent
for _p in (str(SCRIPT_DIR), str(REPO_ROOT)):
    if _p not in sys.path:
        sys.path.insert(0, _p)

from import_common import (  # noqa: E402
    content_key,
    find_chunk_text,
    normalize_name,
)

ENRICHMENT_PROMPT = SCRIPT_DIR / "ENRICHMENT_PROMPT.md"

# Columns pulled from the DB into the prompt as the "current value" context.
_DB_COLUMNS = (
    "id", "name", "description", "rules", "variations",
    "category", "content_type", "language", "normalized_name",
    "page_reference", "source_id", "chunk_key",
    "participants_min", "participants_max",
    "duration_min", "duration_max",
    "age_group_min", "age_group_max",
)

# How much source-chunk text to inline. Chunks are page-sized; cap so a dense
# chunk does not blow the prompt up, but keep enough to ground the expansion.
_CHUNK_TEXT_CAP = 12000


def _fetch_rows(db_path: Path, source_substr: Optional[str]) -> list[dict]:
    conn = sqlite3.connect(db_path)
    conn.row_factory = sqlite3.Row
    try:
        cols = ", ".join(_DB_COLUMNS)
        sql = f"SELECT {cols} FROM activities"
        params: list = []
        if source_substr:
            sql += " WHERE (source_id LIKE ? OR chunk_key LIKE ?)"
            params = [f"%{source_substr}%", f"%{source_substr}%"]
        sql += " ORDER BY source_id, id"
        return [dict(r) for r in conn.execute(sql, params).fetchall()]
    finally:
        conn.close()


def _row_content_key(row: dict) -> str:
    return content_key(
        row.get("normalized_name") or normalize_name(row.get("name") or ""),
        row.get("language"),
        row.get("description") or "",
    )


def _chunk_text_for_row(row: dict, chunks_dir: Path) -> Optional[str]:
    """Locate the source-chunk text via the row's chunk_key / source_id."""
    header = {"chunk_key": row.get("chunk_key"), "source_id": row.get("source_id")}
    if not header["chunk_key"]:
        return None
    # find_chunk_text resolves from the header when chunk_key is present;
    # the json_path arg is only a fallback, so a synthetic path is fine.
    text = find_chunk_text(Path(f"{row['chunk_key']}.json"), header, chunks_dir)
    if text and len(text) > _CHUNK_TEXT_CAP:
        text = text[:_CHUNK_TEXT_CAP] + "\n…[chunk truncated]…"
    return text


def _current_fields_block(row: dict) -> str:
    """The activity's current DB values, as a compact JSON block for context."""
    fields = {
        "name": row.get("name"),
        "description": row.get("description"),
        "rules": row.get("rules"),
        "variations": row.get("variations"),
        "category": row.get("category"),
        "content_type": row.get("content_type"),
        "language": row.get("language"),
        "participants_min": row.get("participants_min"),
        "participants_max": row.get("participants_max"),
        "duration_min": row.get("duration_min"),
        "duration_max": row.get("duration_max"),
        "age_group_min": row.get("age_group_min"),
        "age_group_max": row.get("age_group_max"),
    }
    return json.dumps(fields, ensure_ascii=False, indent=2)


def emit_enrichment_prompt(
    row: dict, key: str, chunks_dir: Path, prompts_dir: Path
) -> Path:
    """Write the subagent enrichment prompt for one activity."""
    chunk_text = _chunk_text_for_row(row, chunks_dir)
    source_block = (
        chunk_text if chunk_text is not None
        else "[source chunk text unavailable — translate only what is given "
             "above; do NOT invent steps, and mark any inferred filter field "
             "as estimated]"
    )
    part_path = f"data/enrichment_parts/{key}.json"
    text = "\n".join([
        f"# ENRICHMENT — activity `{row.get('name')}` (id {row.get('id')})",
        "",
        f"Follow the rules in `{ENRICHMENT_PROMPT.relative_to(REPO_ROOT)}` EXACTLY.",
        "Single pass. Translate faithfully to Romanian; expand description_ro "
        "ONLY from the source chunk text below; mark inferred filter fields in "
        "`estimated_fields`.",
        "",
        f"Write the result JSON to: `{part_path}`",
        f'It MUST include `"content_key": "{key}"`.',
        f'Page reference: {row.get("page_reference") or "?"}',
        "",
        "## Current activity values (the text to translate / enrich)",
        "```json",
        _current_fields_block(row),
        "```",
        "",
        "## Source chunk text (ground description_ro expansion in THIS only)",
        "```",
        source_block,
        "```",
        "",
    ])
    prompts_dir.mkdir(parents=True, exist_ok=True)
    out = prompts_dir / f"{key}.prompt.md"
    out.write_text(text, encoding="utf-8")
    return out


def collect_enrichment(parts_dir: Path, out_path: Path) -> dict:
    """Merge data/enrichment_parts/*.json into one flat content_key map."""
    merged: dict = {}
    bad: list[str] = []
    if parts_dir.is_dir():
        for part in sorted(parts_dir.glob("*.json")):
            try:
                data = json.loads(part.read_text(encoding="utf-8"))
            except (json.JSONDecodeError, OSError):
                bad.append(part.name)
                continue
            key = data.get("content_key") or part.stem
            entry = {k: v for k, v in data.items() if k != "content_key"}
            merged[key] = entry
    out_path.write_text(
        json.dumps(merged, ensure_ascii=False, indent=2), encoding="utf-8"
    )
    return {"entries": len(merged), "bad_parts": bad, "out": str(out_path)}


def run_emit(
    *,
    db_path: Path,
    chunks_dir: Path,
    parts_dir: Path,
    prompts_dir: Path,
    source_substr: Optional[str],
    limit: Optional[int],
) -> dict:
    rows = _fetch_rows(db_path, source_substr)
    emitted, skipped = 0, 0
    for row in rows:
        key = _row_content_key(row)
        if (parts_dir / f"{key}.json").is_file():
            skipped += 1
            continue
        emit_enrichment_prompt(row, key, chunks_dir, prompts_dir)
        emitted += 1
        if limit and emitted >= limit:
            break
    return {
        "rows": len(rows),
        "emitted": emitted,
        "skipped_done": skipped,
        "prompts_dir": str(prompts_dir),
    }


def main(argv: Optional[list[str]] = None) -> int:
    parser = argparse.ArgumentParser(description="Enrichment orchestrator.")
    parser.add_argument("--db", default="data/activities.db")
    parser.add_argument("--chunks", default="data/chunks")
    parser.add_argument("--parts", default="data/enrichment_parts")
    parser.add_argument("--prompts", default="data/enrichment_prompts")
    parser.add_argument("--out", default="data/enrichment.json")
    parser.add_argument("--source", default=None,
                        help="only rows whose source_id/chunk_key contains this (pilot)")
    parser.add_argument("--limit", type=int, default=None,
                        help="cap emitted prompts (pilot)")
    parser.add_argument("--collect", action="store_true",
                        help="merge enrichment parts into the overlay JSON")
    args = parser.parse_args(argv)

    print("=" * 60)
    print("ENRICHMENT ORCHESTRATOR")
    print("=" * 60)

    if args.collect:
        result = collect_enrichment(Path(args.parts), Path(args.out))
        print(f"collected  : {result['entries']} entries -> {result['out']}")
        if result["bad_parts"]:
            print(f"bad parts  : {len(result['bad_parts'])} (skipped)")
            for name in result["bad_parts"]:
                print(f"  - {name}")
        print("Run build_database.py --rebuild to apply the overlay.")
        print("=" * 60)
        return 0

    summary = run_emit(
        db_path=Path(args.db),
        chunks_dir=Path(args.chunks),
        parts_dir=Path(args.parts),
        prompts_dir=Path(args.prompts),
        source_substr=args.source,
        limit=args.limit,
    )
    print(f"rows in DB        : {summary['rows']}"
          + (f"  (filtered by '{args.source}')" if args.source else ""))
    print(f"already enriched  : {summary['skipped_done']}")
    print(f"prompts emitted   : {summary['emitted']}")
    if summary["emitted"]:
        print(f"prompts dir       : {summary['prompts_dir']}/")
        print("Launch waves of ~8-16 Sonnet subagents on those prompts, each "
              "writing data/enrichment_parts/<key>.json, then run "
              "run_enrichment.py --collect and build_database.py --rebuild.")
    else:
        print("Nothing to emit — run --collect then build_database.py --rebuild.")
    print("=" * 60)
    return 0


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