"""
Setup wizard views for initial system configuration.
"""

import os
import logging
import secrets
from fastapi import Request, Depends, Form
from fastapi.responses import RedirectResponse
from sqlalchemy.orm import Session

from app.views.base import APIRouter, templates, get_db
from app.utils.setup_wizard import (
    is_setup_required,
    get_required_settings,
    get_wizard_steps,
    get_missing_required_settings
)
from app.utils.settings_service import save_setting_to_db

logger = logging.getLogger(__name__)
router = APIRouter()


@router.get("/setup")
async def setup_wizard(request: Request, step: int = 1):
    """
    Setup wizard for first-time configuration.
    
    This wizard guides users through configuring essential settings
    needed for the system to operate properly.
    """
    # Get wizard steps
    wizard_steps = get_wizard_steps()
    max_step = max(wizard_steps.keys())
    
    # Validate step number
    if step < 1:
        step = 1
    elif step > max_step:
        step = max_step
    
    # Get settings for current step
    current_settings = wizard_steps.get(step, [])
    
    # Get step category (all settings in a step should have same category)
    step_category = current_settings[0].get("wizard_category", "Configuration") if current_settings else "Configuration"
    
    return templates.TemplateResponse(
        "setup_wizard.html",
        {
            "request": request,
            "current_step": step,
            "max_step": max_step,
            "settings": current_settings,
            "step_category": step_category,
            "progress_percent": int((step / max_step) * 100)
        }
    )


@router.post("/setup")
async def setup_wizard_save(
    request: Request,
    step: int = Form(...),
    db: Session = Depends(get_db)
):
    """
    Save settings from the current wizard step.
    """
    try:
        # Get form data
        form_data = await request.form()
        
        # Get settings for current step
        wizard_steps = get_wizard_steps()
        current_settings = wizard_steps.get(step, [])
        
        # Save each setting from the form
        saved_count = 0
        for setting in current_settings:
            key = setting["key"]
            value = form_data.get(key)
            
            # Skip empty values unless it's explicitly allowed
            if value and value.strip():
                # Auto-generate session_secret if needed
                if key == "session_secret" and value == "auto-generate":
                    value = secrets.token_hex(32)
                    logger.info("Auto-generated session secret")
                
                # Save to database
                if save_setting_to_db(db, key, value):
                    saved_count += 1
                    logger.info(f"Setup wizard: Saved {key}")
        
        logger.info(f"Setup wizard step {step}: Saved {saved_count} settings")
        
        # Determine next step
        max_step = max(wizard_steps.keys())
        next_step = step + 1
        
        if next_step > max_step:
            # Setup complete, redirect to home
            return RedirectResponse(url="/?setup=complete", status_code=303)
        else:
            # Go to next step
            return RedirectResponse(url=f"/setup?step={next_step}", status_code=303)
            
    except Exception as e:
        logger.error(f"Error saving wizard settings: {e}")
        return RedirectResponse(url=f"/setup?step={step}&error=save_failed", status_code=303)


@router.get("/setup/skip")
async def setup_wizard_skip(request: Request):
    """
    Skip the setup wizard (for advanced users).
    
    Creates a marker to indicate setup was skipped.
    """
    try:
        db = next(get_db())
        try:
            # Save a marker to indicate setup was skipped
            save_setting_to_db(db, "_setup_wizard_skipped", "true")
            logger.info("Setup wizard skipped by user")
            return RedirectResponse(url="/", status_code=303)
        finally:
            db.close()
    except Exception as e:
        logger.error(f"Error skipping setup wizard: {e}")
        return RedirectResponse(url="/", status_code=303)