"""
quiXzoom Academy API endpoints for LandveX Admin
"""

from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel
from typing import List, Optional
from datetime import datetime
from app.core.security import get_current_user
from app.models.user import User

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

# Models
class LessonCompleteRequest(BaseModel):
    lesson_id: str
    module_id: str
    score: Optional[int] = None

class ProgressResponse(BaseModel):
    user_id: str
    completed_lessons: List[str]
    current_module: int
    total_progress: float
    certificate_earned: bool
    certificate_date: Optional[str] = None

class CertificateResponse(BaseModel):
    pdf_url: str
    verification_code: str
    issue_date: str

# In-memory storage (replace with DB in production)
academy_progress = {}

LESSONS_PER_MODULE = {
    "module1": 4,
    "module2": 4,
    "module3": 3,
    "module4": 3,
    "module5": 3,
    "module6": 4
}

TOTAL_LESSONS = sum(LESSONS_PER_MODULE.values())

@router.get("/progress", response_model=ProgressResponse)
async def get_progress(current_user: User = Depends(get_current_user)):
    """Get user's academy progress"""
    user_id = str(current_user.id)
    progress = academy_progress.get(user_id, {
        "completed_lessons": [],
        "current_module": 1
    })
    
    completed = len(progress["completed_lessons"])
    total_progress = (completed / TOTAL_LESSONS) * 100
    
    certificate_earned = completed >= TOTAL_LESSONS
    
    return ProgressResponse(
        user_id=user_id,
        completed_lessons=progress["completed_lessons"],
        current_module=progress["current_module"],
        total_progress=round(total_progress, 1),
        certificate_earned=certificate_earned,
        certificate_date=datetime.utcnow().isoformat() if certificate_earned else None
    )

@router.post("/complete", status_code=status.HTTP_200_OK)
async def complete_lesson(
    request: LessonCompleteRequest,
    current_user: User = Depends(get_current_user)
):
    """Mark a lesson as completed"""
    user_id = str(current_user.id)
    
    if user_id not in academy_progress:
        academy_progress[user_id] = {
            "completed_lessons": [],
            "current_module": 1
        }
    
    progress = academy_progress[user_id]
    
    if request.lesson_id not in progress["completed_lessons"]:
        progress["completed_lessons"].append(request.lesson_id)
    
    # Update current module
    module_num = int(request.module_id.replace("module", ""))
    module_lessons = [f"m{module_num}l{i}" for i in range(1, LESSONS_PER_MODULE[request.module_id] + 1)]
    
    if all(l in progress["completed_lessons"] for l in module_lessons):
        progress["current_module"] = min(module_num + 1, 6)
    
    return {
        "success": True,
        "lesson_id": request.lesson_id,
        "progress": len(progress["completed_lessons"]) / TOTAL_LESSONS * 100
    }

@router.get("/certificate", response_model=CertificateResponse)
async def get_certificate(current_user: User = Depends(get_current_user)):
    """Generate certificate PDF"""
    user_id = str(current_user.id)
    progress = academy_progress.get(user_id, {"completed_lessons": []})
    
    if len(progress["completed_lessons"]) < TOTAL_LESSONS:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Certificate not yet earned. Complete all lessons first."
        )
    
    # Generate verification code
    verification = f"QX-{user_id[:8].upper()}-{datetime.utcnow().strftime('%Y%m%d')}"
    
    return CertificateResponse(
        pdf_url=f"/api/academy/certificate/{user_id}/download",
        verification_code=verification,
        issue_date=datetime.utcnow().isoformat()
    )

@router.get("/stats")
async def get_academy_stats(current_user: User = Depends(get_current_user)):
    """Get academy statistics (admin only)"""
    if not current_user.is_admin:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Admin access required"
        )
    
    total_users = len(academy_progress)
    completed_users = sum(
        1 for p in academy_progress.values()
        if len(p["completed_lessons"]) >= TOTAL_LESSONS
    )
    
    return {
        "total_enrolled": total_users,
        "completed_all": completed_users,
        "completion_rate": round(completed_users / total_users * 100, 1) if total_users > 0 else 0,
        "average_progress": round(
            sum(len(p["completed_lessons"]) for p in academy_progress.values()) / total_users / TOTAL_LESSONS * 100, 1
        ) if total_users > 0 else 0
    }