from __future__ import annotations

import os
import sys
import asyncio
import time
from contextlib import asynccontextmanager
from typing import Any

import uvicorn
from dotenv import load_dotenv
from fastapi import FastAPI, HTTPException, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
from pydantic import BaseModel

from models.basketball_v25 import get_basketball_v25_predictor
from services.single_match_orchestrator import get_single_match_orchestrator
from services.v26_shadow_engine import get_v26_shadow_engine
from data.database import dispose_engine

load_dotenv()

if sys.stdout and hasattr(sys.stdout, "reconfigure"):
    sys.stdout.reconfigure(encoding="utf-8")
if sys.stderr and hasattr(sys.stderr, "reconfigure"):
    sys.stderr.reconfigure(encoding="utf-8")


class CouponRequest(BaseModel):
    match_ids: list[str]
    strategy: str | None = "BALANCED"
    max_matches: int | None = None
    min_confidence: float | None = None


@asynccontextmanager
async def lifespan(_: FastAPI):
    try:
        print("🚀 Initializing V28 orchestrator...", flush=True)
        get_single_match_orchestrator()
        get_v26_shadow_engine()
        print("✅ V28 orchestrator ready", flush=True)
    except Exception as error:
        print(f"❌ Failed to initialize orchestrator: {error}", flush=True)
        import traceback

        traceback.print_exc()

    yield

    # Cleanup async DB connections on shutdown
    await dispose_engine()


app = FastAPI(
    title="Suggest-Bet AI Engine",
    version="28.0.0",
    description="V28 Single Match Prediction Package API",
    lifespan=lifespan,
)


def _parse_cors_origins() -> list[str]:
    raw = os.getenv("CORS_ALLOW_ORIGINS", "").strip()
    if raw:
        return [item.strip() for item in raw.split(",") if item.strip()]
    # Dev-safe defaults + production domains.
    return [
        "http://localhost:3000",
        "http://127.0.0.1:3000",
        "http://localhost:3001",
        "http://127.0.0.1:3001",
        "http://localhost:3005",
        "http://127.0.0.1:3005",
        "https://ui-suggestbet.bilgich.com",
        "https://suggestbet.bilgich.com",
        "https://iddaai.com",
        "https://www.iddaai.com",
    ]


app.add_middleware(
    CORSMiddleware,
    allow_origins=_parse_cors_origins(),
    allow_origin_regex=r"^https?://(localhost|127\.0\.0\.1)(:\d+)?$",
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

@app.exception_handler(Exception)
async def global_exception_handler(_: Request, exc: Exception):
    import traceback

    print(f"💥 ERROR: {exc}", flush=True)
    traceback.print_exc()
    return JSONResponse(
        status_code=500,
        content={"message": f"Internal Server Error: {str(exc)}"},
    )


@app.get("/")
def read_root() -> dict[str, Any]:
    return {
        "status": "Suggest-Bet AI Engine v28",
        "engine": "V28 Single Match Orchestrator",
        "mode": os.getenv("AI_ENGINE_MODE", "v28"),
        "routes": [
            "POST /v20plus/analyze/{match_id}",
            "GET /v20plus/analyze-htms/{match_id}",
            "GET /v20plus/analyze-htft/{match_id}",
            "GET /v20plus/reversal-watchlist",
            "POST /v20plus/coupon",
            "GET /v20plus/daily-banker",
        ],
    }


@app.get("/health")
def health_check() -> dict[str, Any]:
    try:
        orchestrator = get_single_match_orchestrator()
        shadow_engine = get_v26_shadow_engine()
        basketball_predictor = get_basketball_v25_predictor()
        basketball_readiness = basketball_predictor.readiness_summary()
        ready = bool(basketball_readiness["fully_loaded"])
        return {
            "status": "healthy" if ready else "degraded",
            "engine": "v28.main",
            "mode": os.getenv("AI_ENGINE_MODE", "v28"),
            "ready": ready,
            "basketball_v25": basketball_readiness,
            "v26_shadow": shadow_engine.readiness_summary(),
            "prediction_service_ready": True,
            "model_loaded": ready,
            "orchestrator_mode": getattr(orchestrator, "engine_mode", "v28"),
        }
    except Exception as error:
        return {"status": "unhealthy", "ready": False, "error": str(error)}


@app.post("/v20plus/analyze/{match_id}")
async def analyze_match_v20plus(match_id: str) -> dict[str, Any]:
    orchestrator = get_single_match_orchestrator()
    result = orchestrator.analyze_match(match_id)
    if not result:
        raise HTTPException(status_code=404, detail=f"Match not found: {match_id}")
    return result


@app.get("/v20plus/analyze-htms/{match_id}")
async def analyze_match_htms_v20plus(match_id: str) -> dict[str, Any]:
    orchestrator = get_single_match_orchestrator()
    result = orchestrator.analyze_match_htms(match_id)
    if not result:
        raise HTTPException(status_code=404, detail=f"Match not found: {match_id}")
    return result


@app.get("/v20plus/analyze-htft/{match_id}")
async def analyze_match_htft_v20plus(match_id: str, timeout_sec: int = 30) -> dict[str, Any]:
    # Small, explicit endpoint for HT/FT inspection and debugging in FE/Postman.
    if timeout_sec < 3 or timeout_sec > 120:
        raise HTTPException(status_code=400, detail="timeout_sec must be between 3 and 120")

    orchestrator = get_single_match_orchestrator()
    started_at = time.time()

    try:
        result = await asyncio.wait_for(
            asyncio.to_thread(orchestrator.analyze_match, match_id),
            timeout=float(timeout_sec),
        )
    except asyncio.TimeoutError as error:
        raise HTTPException(
            status_code=504,
            detail=f"Analyze timeout after {timeout_sec}s for match_id={match_id}",
        ) from error

    if not result:
        raise HTTPException(status_code=404, detail=f"Match not found: {match_id}")

    risk = result.get("risk", {})
    market_board = result.get("market_board", {})
    htft_probs = market_board.get("HTFT", {}).get("probs", {}) or risk.get("ht_ft_probs", {})
    top_reversal_pick = None
    top_reversal_prob = 0.0
    if htft_probs:
        prob_12 = float(htft_probs.get("1/2", 0.0))
        prob_21 = float(htft_probs.get("2/1", 0.0))
        if prob_21 >= prob_12:
            top_reversal_pick = "2/1"
            top_reversal_prob = prob_21
        else:
            top_reversal_pick = "1/2"
            top_reversal_prob = prob_12

    overall_htft_pick = None
    overall_htft_prob = 0.0
    if htft_probs:
        overall_htft_pick, overall_htft_prob = max(
            htft_probs.items(),
            key=lambda item: float(item[1]),
        )
    return {
        "engine": "v28.main",
        "match_info": result.get("match_info", {}),
        "timing_ms": int((time.time() - started_at) * 1000),
        "ht_ft_probs": htft_probs,
        "top_reversal_pick": top_reversal_pick,
        "top_reversal_prob": round(float(top_reversal_prob), 4),
        "overall_htft_pick": overall_htft_pick,
        "overall_htft_pick_prob": round(float(overall_htft_prob), 4),
        "surprise_hunter": result.get("surprise_hunter", {}),
        "ht_ft_reversal_radar": result.get("ht_ft_reversal_radar", {}),
        "first_half_result": result.get("market_board", {}).get("first_half_result", {}),
        "main_pick": result.get("main_pick", {}),
        "bet_summary": result.get("bet_summary", {}),
    }


@app.post("/v20plus/coupon")
async def generate_coupon_v20plus(request: CouponRequest) -> dict[str, Any]:
    orchestrator = get_single_match_orchestrator()
    return orchestrator.build_coupon(
        match_ids=request.match_ids,
        strategy=request.strategy or "BALANCED",
        max_matches=request.max_matches,
        min_confidence=request.min_confidence,
    )


@app.get("/v20plus/daily-banker")
async def get_daily_banker_v20plus(count: int = 3) -> dict[str, Any]:
    if count < 1:
        raise HTTPException(status_code=400, detail="count must be >= 1")

    orchestrator = get_single_match_orchestrator()
    bankers = orchestrator.get_daily_bankers(count=count)
    return {"count": len(bankers), "bankers": bankers}

@app.get("/v20plus/reversal-watchlist")
async def get_reversal_watchlist_v20plus(
    count: int = 20,
    horizon_hours: int = 72,
    min_score: float = 45.0,
    top_leagues_only: bool = False,
) -> dict[str, Any]:
    if count < 1 or count > 100:
        raise HTTPException(status_code=400, detail="count must be between 1 and 100")
    if horizon_hours < 6 or horizon_hours > 168:
        raise HTTPException(status_code=400, detail="horizon_hours must be between 6 and 168")
    if min_score < 0 or min_score > 100:
        raise HTTPException(status_code=400, detail="min_score must be between 0 and 100")

    orchestrator = get_single_match_orchestrator()
    return orchestrator.get_reversal_watchlist(
        count=count,
        horizon_hours=horizon_hours,
        min_score=min_score,
        top_leagues_only=top_leagues_only,
    )


if __name__ == "__main__":
    port = int(os.getenv("PORT", "8000"))
    uvicorn.run("main:app", host="0.0.0.0", port=port, reload=True)