"""FastAPI router — /api/gemeo/*

Mount in main.py:
    from gemeo.api import router as gemeo_router
    app.include_router(gemeo_router)

Endpoints:
    POST /api/gemeo/build        — create twin from case text
    GET  /api/gemeo/{id}          — full twin
    POST /api/gemeo/{id}/evolve  — evolve with new data
    POST /api/gemeo/{id}/whatif  — counterfactual
    POST /api/gemeo/{id}/feedback — record user correction
    GET  /api/gemeo/{id}/cohort
    GET  /api/gemeo/{id}/subgraph
    GET  /api/gemeo/{id}/trajectory
    GET  /api/gemeo/{id}/risk
    GET  /api/gemeo/{id}/drugs
    GET  /api/gemeo/{id}/trials
    GET  /api/gemeo/{id}/next-questions
    GET  /api/gemeo/{id}/sus
    GET  /api/gemeo/{id}/viz
    GET  /api/gemeo/health
"""
from __future__ import annotations
import logging
from dataclasses import asdict
from typing import Optional

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel, Field

from . import core as gcore
from . import bridge, feedback

logger = logging.getLogger("gemeo.api")

router = APIRouter(prefix="/api/gemeo", tags=["gemeo"])


# ─── request models ────────────────────────────────────────────────────────

class BuildRequest(BaseModel):
    case_text: str = Field(..., min_length=10)
    patient_info: dict = Field(default_factory=dict)
    context: dict = Field(default_factory=dict)
    run_diagnosis: bool = True
    cohort_k: int = 10
    horizons_months: list[int] = Field(default_factory=lambda: [6, 12, 24])
    fast: bool = False


class EvolveRequest(BaseModel):
    new_phenotypes: list = Field(default_factory=list)
    new_genes: list = Field(default_factory=list)
    new_labs: list = Field(default_factory=list)
    new_treatments: list = Field(default_factory=list)


class WhatIfRequest(BaseModel):
    intervention: dict = Field(...)


class FeedbackRequest(BaseModel):
    kind: str
    target: dict
    user_correction: dict
    user_id: Optional[str] = None
    comment: Optional[str] = None


# ─── helpers ───────────────────────────────────────────────────────────────

def _twin_to_dict(twin) -> dict:
    if twin is None:
        return None
    return asdict(twin)


# ─── endpoints ─────────────────────────────────────────────────────────────

@router.get("/health")
async def health():
    return {
        "ok": True,
        "module": "gemeo",
        "version": "0.1.0",
        "bridge": bridge.stats(),
        "feedback": feedback.stats(),
    }


@router.post("/build")
async def build(req: BuildRequest):
    twin = await gcore.build_gemeo(
        case_text=req.case_text,
        patient_info=req.patient_info,
        context=req.context,
        run_diagnosis=req.run_diagnosis,
        cohort_k=req.cohort_k,
        horizons_months=req.horizons_months,
        fast=req.fast,
    )
    return _twin_to_dict(twin)


@router.get("/{case_id}")
async def get_twin(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None:
        raise HTTPException(404, f"twin not found for case {case_id}")
    return _twin_to_dict(twin)


@router.post("/{case_id}/evolve")
async def evolve(case_id: str, req: EvolveRequest):
    twin = await gcore.evolve_gemeo(
        case_id,
        new_phenotypes=req.new_phenotypes,
        new_genes=req.new_genes,
        new_labs=req.new_labs,
        new_treatments=req.new_treatments,
    )
    if twin is None:
        raise HTTPException(404, f"twin not found")
    return _twin_to_dict(twin)


@router.post("/{case_id}/whatif")
async def whatif(case_id: str, req: WhatIfRequest):
    out = await gcore.what_if(case_id, req.intervention)
    if out is None:
        raise HTTPException(404, f"twin not found")
    return out


@router.post("/{case_id}/feedback")
async def record_feedback(case_id: str, req: FeedbackRequest):
    twin = gcore.get_gemeo(case_id)
    twin_id = twin.id if twin else case_id
    rec = feedback.record(
        twin_id=twin_id,
        case_id=case_id,
        kind=req.kind,
        target=req.target,
        user_correction=req.user_correction,
        user_id=req.user_id,
        comment=req.comment,
    )
    return {"ok": True, "recorded": rec}


@router.get("/{case_id}/cohort")
async def get_cohort(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.cohort is None:
        raise HTTPException(404, "cohort not available")
    return asdict(twin.cohort)


@router.get("/{case_id}/subgraph")
async def get_subgraph(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.subgraph is None:
        raise HTTPException(404, "subgraph not available")
    return asdict(twin.subgraph)


@router.get("/{case_id}/trajectory")
async def get_trajectory(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.trajectory is None:
        raise HTTPException(404, "trajectory not available")
    return asdict(twin.trajectory)


@router.get("/{case_id}/risk")
async def get_risk(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.risk is None:
        raise HTTPException(404, "risk not available")
    return asdict(twin.risk)


@router.get("/{case_id}/drugs")
async def get_drugs(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.drugs is None:
        raise HTTPException(404, "drugs not available")
    return asdict(twin.drugs)


@router.get("/{case_id}/trials")
async def get_trials(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.trials is None:
        raise HTTPException(404, "trials not available")
    return asdict(twin.trials)


@router.get("/{case_id}/next-questions")
async def get_next_questions(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None:
        raise HTTPException(404, "twin not found")
    return [asdict(q) for q in (twin.next_questions or [])]


@router.get("/{case_id}/sus")
async def get_sus(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.sus_check is None:
        raise HTTPException(404, "sus check not available")
    return asdict(twin.sus_check)


@router.get("/{case_id}/viz")
async def get_viz(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.viz_data is None:
        raise HTTPException(404, "viz not available")
    return asdict(twin.viz_data)


# ─── Phase-2 case-driven endpoints ────────────────────────────────────────


@router.get("/{case_id}/ddi")
async def get_ddi(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.ddi is None:
        raise HTTPException(404, "DDI analysis not available")
    return asdict(twin.ddi)


@router.get("/{case_id}/pharmacogen")
async def get_pharmacogen(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.pharmacogen is None:
        raise HTTPException(404, "pharmacogen analysis not available")
    return asdict(twin.pharmacogen)


@router.get("/{case_id}/family")
async def get_family(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.family is None:
        raise HTTPException(404, "family analysis not available")
    return asdict(twin.family)


@router.get("/{case_id}/reverse-pheno")
async def get_reverse_pheno(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.reverse_pheno is None:
        raise HTTPException(404, "reverse phenotyping not available")
    return asdict(twin.reverse_pheno)


@router.get("/{case_id}/protocol-compliance")
async def get_protocol_compliance(case_id: str):
    twin = await gcore.query_gemeo(case_id)
    if twin is None or twin.protocol_compliance is None:
        raise HTTPException(404, "protocol compliance not available")
    return asdict(twin.protocol_compliance)


class ConsultRequest(BaseModel):
    panel: list[str] = Field(default_factory=list)
    question: Optional[str] = None


@router.post("/{case_id}/consult")
async def post_consult(case_id: str, req: ConsultRequest):
    out = await gcore.consult(case_id, panel=req.panel or None, question=req.question)
    if out is None:
        raise HTTPException(404, "twin not found")
    return out


class SimulateRequest(BaseModel):
    n_runs: int = 30
    intervention: Optional[dict] = None
    horizons_months: list[int] = Field(default_factory=lambda: [6, 12, 24])


@router.post("/{case_id}/simulate")
async def post_simulate(case_id: str, req: SimulateRequest):
    out = await gcore.simulate(
        case_id,
        n_runs=req.n_runs,
        intervention=req.intervention,
        horizons_months=req.horizons_months,
    )
    if out is None:
        raise HTTPException(404, "twin not found")
    return out


class DDIRequest(BaseModel):
    medications: list = Field(default_factory=list)
    add_drug: Optional[dict] = None


@router.post("/ddi/check")
async def check_ddi_standalone(req: DDIRequest):
    """Standalone DDI check — does not require a twin."""
    from . import ddi as gddi_mod
    spec = await gddi_mod.predict(medications=req.medications, add_drug=req.add_drug)
    return asdict(spec)


# ─── LLM context / GraphRAG / absorb ──────────────────────────────────────


class LookupRequest(BaseModel):
    query: str = Field(..., min_length=2)
    mode: str = Field(default="local")


class AbsorbRequest(BaseModel):
    message: str = Field(..., min_length=1)
    source: str = Field(default="user")


@router.get("/{case_id}/context")
async def get_llm_context(case_id: str, max_chars: int = 4000):
    """Returns the Markdown context block injected into LLM system prompts."""
    from . import core as gcore, llm_context
    twin = gcore.get_gemeo(case_id) or await gcore.query_gemeo(case_id)
    if twin is None:
        raise HTTPException(404, "twin not found")
    block = llm_context.serialize_twin_for_llm(twin, max_chars=max_chars)
    return {
        "case_id": case_id,
        "twin_id": twin.id,
        "header": llm_context.GEMEO_HEADER,
        "instructions": llm_context.GEMEO_INSTRUCTIONS,
        "context": block,
        "context_chars": len(block),
        "max_chars": max_chars,
    }


@router.post("/{case_id}/lookup")
async def llm_lookup(case_id: str, req: LookupRequest):
    """GraphRAG retrieval — used by the LLM via the gemeo_lookup tool, or by
    the front-end to preview what evidence the model would receive."""
    from . import graphrag
    result = await graphrag.retrieve(case_id, req.query, mode=req.mode)
    return {**result, "rendered": graphrag.format_for_llm(result)}


@router.post("/{case_id}/absorb")
async def absorb_msg(case_id: str, req: AbsorbRequest):
    """Extract HPO/ORPHA/gene/lab/treatment mentions from a free-text
    message via the LLM-based extractor (negation/family-history aware)
    and feed back into the twin via evolve_gemeo.

    Falls back to regex when the LLM router is unavailable.
    """
    from . import extractor
    return await extractor.absorb(case_id, req.message, source=req.source)


# ─── SOTA additions: event-stream, verifier, suggested-skills, cache ─────


@router.get("/{case_id}/event-stream")
async def get_event_stream(case_id: str):
    """TwinWeaver-style chronological event tape (LLM-friendly)."""
    twin = await gcore.query_gemeo(case_id)
    if twin is None:
        raise HTTPException(404, "twin not found")
    from . import event_stream
    tape = event_stream.serialize_twin_as_event_stream(twin)
    return {"case_id": case_id, "event_stream": tape, "chars": len(tape)}


class VerifyRequest(BaseModel):
    text: str
    mode: str = "light"


@router.post("/{case_id}/verify")
async def verify_recommendation(case_id: str, req: VerifyRequest):
    """Med-TIV-style verifier — extract claims, ground via KG, flag unverified."""
    from . import verifier
    rep = await verifier.verify(case_id, req.text, mode=req.mode)
    return asdict(rep)


@router.get("/{case_id}/suggested-skills")
async def get_suggested_skills(case_id: str, top_n: int = 8):
    """Skill router — return top-N relevant skills for this twin."""
    twin = await gcore.query_gemeo(case_id)
    if twin is None:
        raise HTTPException(404, "twin not found")
    from . import skill_router
    suggestions = skill_router.suggest(twin, top_n=top_n)
    mcp_servers = skill_router.suggest_mcp_servers(twin)
    return {
        "case_id": case_id,
        "skills": [asdict(s) for s in suggestions],
        "mcp_servers": mcp_servers,
    }


@router.get("/cache/stats")
async def get_cache_stats():
    """Aura LookupCache stats (AMG-RAG style)."""
    from . import cache
    return await cache.stats()


# ─── Multimodal extraction ─────────────────────────────────────────────────
# Receives a clinical image (screenshot / PDF page / lab printout) and
# returns structured entities {hpo, medications, diagnoses, labs, patient}.
# Lives in the backend (not the Vercel function) so we can reuse the
# raras-app KG to normalize HPO IDs and so the Groq/Gemini billing is
# centralized.
# NOTE: don't import UploadFile/File/Form at module top-level — that
# pulls python-multipart into FastAPI's dependency analyzer at import
# time, which crashes the orch boot if the package isn't installed.
# Instead, do the import + the actual route registration lazily below
# guarded by a try/except so the orch still serves the rest of /api/gemeo
# even if multipart isn't installed.


class _ExtractImageJSON(BaseModel):
    """JSON-only shape so we don't need python-multipart for the
    primary path. Frontend can either POST application/json with
    base64 OR multipart/form-data if the package is available."""
    image_base64: str = Field(..., min_length=16)
    mime: str = "image/png"
    source_url: Optional[str] = None


@router.post("/extract-image-json")
async def extract_image_json_endpoint(req: _ExtractImageJSON):
    """JSON intake — same response shape as /extract-image. Used by
    the Next.js proxy which always converts inbound multipart to base64
    before forwarding here. Avoids the python-multipart dep entirely."""
    from . import multimodal_extract
    from base64 import b64decode
    # Strip optional data-URL prefix in case the caller sent one.
    clean = req.image_base64
    if clean.startswith("data:"):
        clean = clean.split(",", 1)[-1]
    try:
        raw = b64decode(clean)
    except Exception as e:
        raise HTTPException(400, f"bad base64: {e!s}")
    if len(raw) > 15 * 1024 * 1024:
        raise HTTPException(413, f"image too large ({len(raw)/1024/1024:.1f}MB, max 15MB)")
    try:
        return await multimodal_extract.extract_image(
            image_bytes=raw, mime=req.mime, source_url=req.source_url,
        )
    except Exception as e:
        raise HTTPException(502, f"extraction failed: {e!s}")


# Multipart route is registered lazily so a missing python-multipart
# install doesn't take the whole router down at import time. When the
# package IS available, the route adds parity with the Vercel intake.
try:
    from fastapi import UploadFile, File, Form

    @router.post("/extract-image")
    async def extract_image_endpoint(
        file: UploadFile = File(...),
        source_url: Optional[str] = Form(None),
    ):
        """Multipart intake — same response shape as /extract-image-json."""
        from . import multimodal_extract
        raw = await file.read()
        if len(raw) > 15 * 1024 * 1024:
            raise HTTPException(413, f"image too large ({len(raw)/1024/1024:.1f}MB, max 15MB)")
        mime = file.content_type or "image/png"
        try:
            return await multimodal_extract.extract_image(
                image_bytes=raw, mime=mime, source_url=source_url,
            )
        except Exception as e:
            raise HTTPException(502, f"extraction failed: {e!s}")
except Exception as _multipart_err:  # noqa: F841
    # python-multipart not installed — the JSON route still works.
    logger.warning(
        "[gemeo.api] multipart extract route disabled (python-multipart missing). "
        "JSON route /extract-image-json remains available."
    )