"""
JarvisChat - RAG pipeline: Qdrant vector search + system prompt assembly.
"""
import asyncio
import logging

import httpx

from eviction import _update_retrieval_count
from db import get_db, get_setting, list_skills_with_state, format_active_skills_prompt
from memory import search_memories
from config import MAX_SKILL_PROMPT_CHARS, QDRANT_URL, RAG_COLLECTION

log = logging.getLogger("jarvischat")

EMBED_URL = "http://192.168.50.210:11434"
EMBED_MODEL = "mxbai-embed-large"
RAG_SCORE_THRESHOLD = 0.25

# Re-export eviction symbols for backward compatibility
from eviction import (  # noqa: E402
    maybe_evict, get_rag_operational_stats, EVICTION_LOG,
    get_collection_count, get_collection_stats, evict_batch,
)


def chunk_text(text: str, chunk_size: int = 512, overlap: int = 128) -> list:
    words = text.split()
    target_words = int(chunk_size / 1.3)
    overlap_words = int(overlap / 1.3)
    if not words:
        return []
    chunks = []
    start = 0
    while start < len(words):
        end = min(start + target_words, len(words))
        chunks.append(" ".join(words[start:end]))
        if end == len(words):
            break
        start += target_words - overlap_words
    return chunks


async def query_rag(query: str, limit: int = 3) -> list:
    try:
        async with httpx.AsyncClient() as client:
            embed_resp = await client.post(
                f"{EMBED_URL}/api/embeddings",
                json={"model": EMBED_MODEL, "prompt": query},
                timeout=10.0,
            )
            if embed_resp.status_code != 200:
                return []
            vector = embed_resp.json()["embedding"]
            search_resp = await client.post(
                f"{QDRANT_URL}/collections/{RAG_COLLECTION}/points/search",
                json={"vector": vector, "limit": limit, "with_payload": True},
                timeout=10.0,
            )
            if search_resp.status_code != 200:
                return []
            results = search_resp.json().get("result", [])
            for r in results:
                pid = r.get("id")
                if pid:
                    current = r.get("payload", {}).get("retrieval_count", 0) or 0
                    asyncio.ensure_future(_update_retrieval_count(pid, current))
            return results
    except Exception as e:
        log.warning(f"RAG query error: {e}")
        return []


async def build_system_prompt(db, extra_prompt: str = "", user_message: str = "") -> str:
    parts = []
    settings = {row["key"]: row["value"] for row in db.execute("SELECT key, value FROM settings").fetchall()}

    if settings.get("profile_enabled", "true") == "true":
        profile = db.execute("SELECT content FROM profile WHERE id = 1").fetchone()
        if profile and profile["content"].strip():
            parts.append(profile["content"].strip())

    if settings.get("memory_enabled", "true") == "true" and user_message:
        memories = search_memories(user_message, limit=5)
        if memories:
            memory_lines = [f"- {m['fact']}" for m in memories]
            parts.append("## Relevant Context from Memory\n" + "\n".join(memory_lines))
            log.debug(f"Injected {len(memories)} memories into context")

    if user_message:
        try:
            rag_results = await query_rag(user_message)
            if rag_results:
                rag_lines = [r["payload"]["text"] for r in rag_results if r["score"] > RAG_SCORE_THRESHOLD]
                if rag_lines:
                    parts.append("## Retrieved Context\n" + "\n\n---\n\n".join(rag_lines))
                    log.info(f"RAG injected {len(rag_lines)} chunks into context")
        except Exception as e:
            log.warning(f"RAG injection error: {e}")

    if settings.get("skills_enabled", "true") == "true":
        active_skills = [s for s in list_skills_with_state(db) if s["enabled"]]
        if active_skills:
            parts.append(format_active_skills_prompt(active_skills))

    if extra_prompt and extra_prompt.strip():
        parts.append(extra_prompt.strip())

    return "\n\n---\n\n".join(parts) if parts else ""