#!/usr/bin/env python3
"""Entity schema migration — separate decisions from entities.

Step 1: Move decision_market entities to decisions/{domain}/
Step 2: Update frontmatter (type: entity → type: decision)
Step 3: Update pipeline config (TYPE_SCHEMAS, entity paths)

Run from the repo root:
    cd /opt/teleo-eval/workspaces/main  # or extract/
    python3 /opt/teleo-eval/pipeline/migrate-entity-schema.py [--dry-run]

Epimetheus. Reviewed by Leo (architecture), Rio (taxonomy), Ganymede (migration path).
"""

import argparse
import glob
import os
import re
import shutil
from pathlib import Path


def find_decision_markets(repo_root: str) -> list[dict]:
    """Find all decision_market entity files."""
    decisions = []
    for filepath in glob.glob(os.path.join(repo_root, "entities", "*", "*.md")):
        try:
            content = open(filepath).read()
        except Exception:
            continue

        if "entity_type: decision_market" in content:
            domain = Path(filepath).parent.name
            filename = Path(filepath).name
            decisions.append({
                "source": filepath,
                "domain": domain,
                "filename": filename,
                "dest": os.path.join(repo_root, "decisions", domain, filename),
            })
    return decisions


def update_frontmatter_type(content: str) -> str:
    """Change type: entity to type: decision for decision files."""
    content = re.sub(r"^type:\s*entity\s*$", "type: decision", content, count=1, flags=re.MULTILINE)
    return content


def migrate(repo_root: str, dry_run: bool = False):
    """Run the migration."""
    decisions = find_decision_markets(repo_root)
    print(f"Found {len(decisions)} decision_market files to migrate")

    # Group by domain
    by_domain: dict[str, list] = {}
    for d in decisions:
        by_domain.setdefault(d["domain"], []).append(d)

    for domain, files in by_domain.items():
        print(f"\n  {domain}: {len(files)} decisions")

        dest_dir = os.path.join(repo_root, "decisions", domain)
        if not dry_run:
            os.makedirs(dest_dir, exist_ok=True)

        for f in files:
            print(f"    {f['filename']}")
            if not dry_run:
                # Read, update frontmatter, write to new location
                content = open(f["source"]).read()
                content = update_frontmatter_type(content)
                with open(f["dest"], "w") as out:
                    out.write(content)
                # Remove original
                os.remove(f["source"])

    # Summary
    remaining_entities = glob.glob(os.path.join(repo_root, "entities", "*", "*.md"))
    remaining_by_domain: dict[str, int] = {}
    for f in remaining_entities:
        d = Path(f).parent.name
        remaining_by_domain[d] = remaining_by_domain.get(d, 0) + 1

    print(f"\n{'='*60}")
    print(f"  MIGRATION {'(DRY RUN) ' if dry_run else ''}COMPLETE")
    print(f"  Decisions moved: {len(decisions)}")
    print(f"  Entities remaining: {len(remaining_entities)}")
    for domain, count in sorted(remaining_by_domain.items()):
        print(f"    {domain}: {count}")
    print(f"  Decision directories created: {list(by_domain.keys())}")
    print(f"{'='*60}")


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Migrate decision_market entities to decisions/")
    parser.add_argument("--repo-root", default=".", help="Repository root")
    parser.add_argument("--dry-run", action="store_true", help="Show what would change without changing")
    args = parser.parse_args()
    migrate(args.repo_root, args.dry_run)