"""Global search API endpoint."""

from flask import Blueprint, request
from flask_jwt_extended import jwt_required

from shopdb.extensions import db
from shopdb.core.models import (
    Machine, Application, KnowledgeBase
)
from shopdb.utils.responses import success_response

search_bp = Blueprint('search', __name__)


@search_bp.route('', methods=['GET'])
@jwt_required(optional=True)
def global_search():
    """
    Global search across multiple entity types.

    Returns combined results from:
    - Machines (equipment and PCs)
    - Applications
    - Knowledge Base articles
    - Printers (if available)

    Results are sorted by relevance score.
    """
    query = request.args.get('q', '').strip()

    if not query or len(query) < 2:
        return success_response({
            'results': [],
            'query': query,
            'message': 'Search query must be at least 2 characters'
        })

    if len(query) > 200:
        return success_response({
            'results': [],
            'query': query[:200],
            'message': 'Search query too long'
        })

    results = []
    search_term = f'%{query}%'

    # Search Machines (Equipment and PCs)
    machines = Machine.query.filter(
        Machine.isactive == True,
        db.or_(
            Machine.machinenumber.ilike(search_term),
            Machine.alias.ilike(search_term),
            Machine.hostname.ilike(search_term),
            Machine.serialnumber.ilike(search_term),
            Machine.notes.ilike(search_term)
        )
    ).limit(10).all()

    for m in machines:
        # Determine type: PC, Printer, or Equipment
        is_pc = m.pctypeid is not None
        is_printer = m.is_printer

        # Calculate relevance - exact matches score higher
        relevance = 15
        if m.machinenumber and query.lower() == m.machinenumber.lower():
            relevance = 100
        elif m.hostname and query.lower() == m.hostname.lower():
            relevance = 100
        elif m.alias and query.lower() in m.alias.lower():
            relevance = 50

        display_name = m.hostname if is_pc and m.hostname else m.machinenumber
        if m.alias and not is_pc:
            display_name = f"{m.machinenumber} ({m.alias})"

        # Determine result type and URL
        if is_printer:
            result_type = 'printer'
            url = f"/printers/{m.machineid}"
        elif is_pc:
            result_type = 'pc'
            url = f"/pcs/{m.machineid}"
        else:
            result_type = 'machine'
            url = f"/machines/{m.machineid}"

        # Get location - prefer machine's own location, fall back to parent machine's location
        location_name = None
        if m.location:
            location_name = m.location.locationname
        elif m.parent_relationships:
            # Check parent machines for location
            for rel in m.parent_relationships:
                if rel.parent_machine and rel.parent_machine.location:
                    location_name = rel.parent_machine.location.locationname
                    break

        # Get machinetype from model (single source of truth)
        mt = m.derived_machinetype
        results.append({
            'type': result_type,
            'id': m.machineid,
            'title': display_name,
            'subtitle': mt.machinetype if mt else None,
            'location': location_name,
            'url': url,
            'relevance': relevance
        })

    # Search Applications
    apps = Application.query.filter(
        Application.isactive == True,
        db.or_(
            Application.appname.ilike(search_term),
            Application.appdescription.ilike(search_term)
        )
    ).limit(10).all()

    for app in apps:
        relevance = 20
        if query.lower() == app.appname.lower():
            relevance = 100
        elif query.lower() in app.appname.lower():
            relevance = 50

        results.append({
            'type': 'application',
            'id': app.appid,
            'title': app.appname,
            'subtitle': app.appdescription[:100] if app.appdescription else None,
            'url': f"/applications/{app.appid}",
            'relevance': relevance
        })

    # Search Knowledge Base
    kb_articles = KnowledgeBase.query.filter(
        KnowledgeBase.isactive == True,
        db.or_(
            KnowledgeBase.shortdescription.ilike(search_term),
            KnowledgeBase.keywords.ilike(search_term)
        )
    ).limit(20).all()

    for kb in kb_articles:
        # Weight by clicks and keyword match
        relevance = 10 + (kb.clicks or 0) * 0.1
        if kb.keywords and query.lower() in kb.keywords.lower():
            relevance += 15

        results.append({
            'type': 'knowledgebase',
            'id': kb.linkid,
            'title': kb.shortdescription,
            'subtitle': kb.application.appname if kb.application else None,
            'url': f"/knowledgebase/{kb.linkid}",
            'linkurl': kb.linkurl,
            'relevance': relevance
        })

    # Search Printers (check if printers model exists)
    try:
        from shopdb.plugins.printers.models import Printer
        printers = Printer.query.filter(
            Printer.isactive == True,
            db.or_(
                Printer.printercsfname.ilike(search_term),
                Printer.printerwindowsname.ilike(search_term),
                Printer.serialnumber.ilike(search_term),
                Printer.fqdn.ilike(search_term)
            )
        ).limit(10).all()

        for p in printers:
            relevance = 15
            if p.printercsfname and query.lower() == p.printercsfname.lower():
                relevance = 100

            display_name = p.printercsfname or p.printerwindowsname or f"Printer #{p.printerid}"

            results.append({
                'type': 'printer',
                'id': p.printerid,
                'title': display_name,
                'subtitle': p.printerwindowsname if p.printercsfname else None,
                'url': f"/printers/{p.printerid}",
                'relevance': relevance
            })
    except ImportError:
        pass  # Printers plugin not installed

    # Sort by relevance (highest first)
    results.sort(key=lambda x: x['relevance'], reverse=True)

    # Limit total results
    results = results[:30]

    return success_response({
        'results': results,
        'query': query,
        'total': len(results)
    })