"""Content Performance Router"""
from fastapi import APIRouter, UploadFile, File
from pydantic import BaseModel
from typing import Optional

router = APIRouter()


class EngagementData(BaseModel):
    content_id: str
    total_views: int
    completion_rate: float
    avg_time_spent: float
    drop_off_points: list[dict]


class RetentionCurve(BaseModel):
    content_id: str
    time_points: list[float]  # percentages through content
    retention_rates: list[float]  # % still engaged at each point


class ABTestResult(BaseModel):
    variant_a: dict
    variant_b: dict
    winner: Optional[str] = None
    confidence: float
    lift: float


@router.post("/analyze")
async def analyze_engagement(file: UploadFile = File(...)):
    """Analyze content engagement data"""
    # TODO: Implement engagement analysis
    return {
        "summary": {},
        "top_performing": [],
        "needs_improvement": []
    }


@router.post("/retention-curve", response_model=RetentionCurve)
async def calculate_retention(
    file: UploadFile = File(...),
    content_id: str = None
):
    """Calculate retention curve for content"""
    # TODO: Implement retention calculation
    return RetentionCurve(
        content_id=content_id or "unknown",
        time_points=[],
        retention_rates=[]
    )


@router.post("/drop-off-analysis")
async def analyze_drop_offs(file: UploadFile = File(...)):
    """Identify content drop-off points"""
    # TODO: Implement drop-off analysis
    return {
        "drop_off_points": [],
        "recommendations": []
    }


@router.post("/ab-test", response_model=ABTestResult)
async def analyze_ab_test(
    variant_a_file: UploadFile = File(...),
    variant_b_file: UploadFile = File(...)
):
    """Analyze A/B test results"""
    # TODO: Implement A/B test analysis
    return ABTestResult(
        variant_a={},
        variant_b={},
        confidence=0.0,
        lift=0.0
    )