"""
RAG GitHub Feeder v2 - Declarative, Config-Driven
==================================================
Add any GitHub repo as a RAG data source with minimal config.
Auto-clones, extracts markdown/solidity/text, chunks, and ingests.

Config format (add to SOURCES list):
{
    "repo": "owner/repo",
    "collection": "defi_hacks|vuln_patterns|contract_audits|...",
    "category": "defi_hack|audit|scam_report|...",
    "tags": ["tag1", "tag2"],
    "file_patterns": ["*.md", "*.sol", "*.py"],  # files to extract
    "max_files": 50,  # limit per run
    "enabled": True,
}
"""

import asyncio
import glob
import json
import os
import re
import subprocess

import httpx

BACKEND = "http://localhost:8000"
INGEST_URL = f"{BACKEND}/api/v1/rag/ingest"

# ═══════════════════════════════════════════════════
# DECLARATIVE SOURCE CONFIG - add repos here
# ═══════════════════════════════════════════════════
SOURCES = [
    {
        "repo": "SunWeb3Sec/DeFiHackLabs",
        "collection": "defi_hacks",
        "category": "defi_hack",
        "tags": ["DeFi", "hack_reproduction", "Foundry", "education"],
        "file_patterns": ["*.md"],
        "max_files": 50,
        "enabled": True,
    },
    {
        "repo": "TradMod/awesome-audits-checklists",
        "collection": "contract_audits",
        "category": "audit_checklist",
        "tags": ["audit", "checklist", "smart_contract", "security"],
        "file_patterns": ["*.md"],
        "max_files": 20,
        "enabled": True,
    },
    {
        "repo": "alt-research/SolidityGuard",
        "collection": "vuln_patterns",
        "category": "vuln_pattern",
        "tags": ["OWASP", "Solidity", "security", "vulnerability"],
        "file_patterns": ["*.md", "*.sol"],
        "max_files": 40,
        "enabled": True,
    },
    {
        "repo": "forta-network/labelled-datasets",
        "collection": "known_scams",
        "category": "scam_report",
        "tags": ["Forta", "labelled_data", "threat_intel", "web3_security"],
        "file_patterns": ["*.md", "*.json", "*.csv"],
        "max_files": 30,
        "enabled": True,
    },
    {
        "repo": "Messi-Q/Smart-Contract-Dataset",
        "collection": "vuln_patterns",
        "category": "vuln_pattern",
        "tags": ["dataset", "smart_contract", "vulnerability", "academic"],
        "file_patterns": ["*.md", "*.sol", "*.csv"],
        "max_files": 30,
        "enabled": True,
    },
    {
        "repo": "nurkiewicz/crypto-hall-of-shame",
        "collection": "rug_timeline",
        "category": "scam_report",
        "tags": ["scam_timeline", "historical", "hall_of_shame"],
        "file_patterns": ["*.md", "*.adoc"],
        "max_files": 5,
        "enabled": True,
    },
]

CLONE_DIR = "/tmp/rag_sources"


def ensure_cloned(repo: str) -> str | None:
    """Clone repo if not already present. Returns path or None."""
    name = repo.split("/")[-1]
    path = os.path.join(CLONE_DIR, name)
    if os.path.exists(path):
        return path
    os.makedirs(CLONE_DIR, exist_ok=True)
    try:
        subprocess.run(
            ["git", "clone", "--depth", "1", f"https://github.com/{repo}.git", path],
            capture_output=True,
            timeout=60,
        )
        return path if os.path.exists(path) else None
    except Exception:
        return None


def extract_from_repo(source: dict) -> list[dict]:
    """Extract documents from a cloned GitHub repo."""
    path = ensure_cloned(source["repo"])
    if not path:
        print(f"  {source['repo']}: clone failed")
        return []

    docs = []
    patterns = source.get("file_patterns", ["*.md"])
    max_files = source.get("max_files", 50)

    files = []
    for pat in patterns:
        files.extend(glob.glob(f"{path}/**/{pat}", recursive=True))

    for fpath in files[:max_files]:
        try:
            # Skip binary/large files
            size = os.path.getsize(fpath)
            if size > 500_000 or size < 50:
                continue

            with open(fpath, errors="ignore") as f:
                content = f.read()

            if not content.strip():
                continue

            # Extract filename for title
            relpath = os.path.relpath(fpath, path)
            name = os.path.splitext(os.path.basename(fpath))[0]

            # Try to extract a title from markdown heading
            title_match = re.search(r"^#\s+(.+)", content, re.MULTILINE)
            title = title_match.group(1) if title_match else name

            # For .sol files, extract contract/function structure
            if fpath.endswith(".sol"):
                contracts = re.findall(r"(?:contract|interface|library)\s+(\w+)", content)
                funcs = re.findall(r"function\s+(\w+)", content)[:10]
                summary = f"Solidity: {', '.join(contracts[:5])}. Functions: {', '.join(funcs)}"
                text = f"Smart Contract: {title} ({relpath})\n\n{summary}\n\n{content[:3000]}"
            elif fpath.endswith(".json"):
                try:
                    data = json.loads(content)
                    text = f"Dataset: {title}\n\n{json.dumps(data, indent=2)[:3000]}"
                except Exception:
                    text = f"Data File: {title}\n\n{content[:2000]}"
            elif fpath.endswith(".csv"):
                lines = content.split("\n")[:50]
                text = f"CSV Data: {title}\n\n" + "\n".join(lines)
            else:
                text = f"{title}\n\n{content[:3000]}"

            docs.append(
                {
                    "text": text[:4000],
                    "source": source["repo"],
                    "url": f"https://github.com/{source['repo']}/blob/main/{relpath}",
                    "category": source["category"],
                    "tags": source.get("tags", []),
                }
            )
        except Exception:
            pass

    print(f"  {source['repo']}: {len(docs)} docs from {len(files[:max_files])} files")
    return docs


async def ingest_repo(source: dict):
    """Clone, extract, and ingest a single repo."""
    docs = extract_from_repo(source)
    if not docs:
        return 0

    total = 0
    async with httpx.AsyncClient(timeout=120) as c:
        for i in range(0, len(docs), 30):
            batch = docs[i : i + 30]
            try:
                r = await c.post(
                    INGEST_URL,
                    json={
                        "collection": source["collection"],
                        "documents": batch,
                        "source": source["repo"],
                        "chunking": "scam_report",
                    },
                )
                if r.status_code == 200:
                    n = r.json().get("ingested", 0)
                    total += n
            except Exception:
                pass
    return total


async def ingest_all():
    """Run all enabled sources."""
    print("=== RAG GitHub Feeder v2 ===\n")
    results = {}
    total = 0

    for src in SOURCES:
        if not src.get("enabled", True):
            continue
        print(f"Ingesting: {src['repo']} → {src['collection']}")
        n = await ingest_repo(src)
        results[src["repo"]] = n
        total += n
        print(f"  ingested: {n}\n")

    print(f"Total: {total} docs across {len(results)} sources")
    return results


if __name__ == "__main__":
    asyncio.run(ingest_all())