from flask import Blueprint, render_template, url_for, request, redirect
from .models import Area, Brand, Item, Inventory, RoomFunction, User, WorkLog, Room
import html
from sqlalchemy import or_
from sqlalchemy.orm import aliased
from typing import Callable, Any, List
from . import db
from .utils import eager_load_user_relationships, eager_load_inventory_relationships, eager_load_room_relationships, eager_load_worklog_relationships, chunk_list

main = Blueprint('main', __name__)

checked_box = '''
    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-check2" viewBox="0 0 16 16">
        <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0"/>
    </svg>
'''
unchecked_box = ''

ACTIVE_STATUSES = [
    "Working",
    "Deployed",
    "Partially Inoperable",
    "Unverified"
]

INACTIVE_STATUSES = [
    "Inoperable",
    "Removed",
    "Disposed"
]

inventory_headers = {
    "Date Entered": lambda i: {"text": i.timestamp.strftime("%Y-%m-%d") if i.timestamp else None},
    "Identifier": lambda i: {"text": i.identifier},
    "Inventory #": lambda i: {"text": i.inventory_name},
    "Serial #": lambda i: {"text": i.serial},
    "Bar Code #": lambda i: {"text": i.barcode},
    "Brand": lambda i: {"text": i.brand.name} if i.brand else {"text": None},
    "Model": lambda i: {"text": i.model},
    "Item Type": lambda i: {"text": i.item.description} if i.item else {"text": None},
    "Shared?": lambda i: {"text": i.shared, "type": "bool", "html": checked_box if i.shared else unchecked_box},
    "Owner": lambda i: {"text": i.owner.full_name, "url": url_for("main.user", id=i.owner.id)} if i.owner else {"text": None},
    "Location": lambda i: {"text": i.location.full_name} if i.location else {"Text": None},
    "Condition": lambda i: {"text": i.condition},
    # "Notes": lambda i: {"text": i.notes}
}

user_headers = {
    "Last Name": lambda i: {"text": i.last_name},
    "First Name": lambda i: {"text": i.first_name},
    "Supervisor": lambda i: {"text": i.supervisor.full_name, "url": url_for("main.user", id=i.supervisor.id)} if i.supervisor else {"text": None},
    "Location": lambda i: {"text": i.location.full_name} if i.location else {"text": None},
    "Staff?": lambda i: {"text": i.staff, "type": "bool", "html": checked_box if i.staff else unchecked_box},
    "Active?": lambda i: {"text": i.active, "type": "bool", "html": checked_box if i.active else unchecked_box}
}

worklog_headers = {
    "Contact": lambda i: {"text": i.contact.full_name, "url": url_for("main.user", id=i.contact.id)} if i.contact else {"Text": None},
    "Work Item": lambda i: {"text": i.work_item.identifier, "url": url_for('main.inventory_item',id=i.work_item.id)} if i.work_item else {"text": None},
    "Start Time": lambda i: {"text": i.start_time.strftime("%Y-%m-%d")},
    "End Time": lambda i: {"text": i.end_time.strftime("%Y-%m-%d")} if i.end_time else {"text": None},
    "Complete?": lambda i: {"text": i.complete, "type": "bool", "html": checked_box if i.complete else unchecked_box},
    "Follow Up?": lambda i: {"text": i.followup, "type": "bool", "html": checked_box if i.followup else unchecked_box},
    "Quick Analysis?": lambda i: {"text": i.analysis, "type": "bool", "html": checked_box if i.analysis else unchecked_box},
}

worklog_form_fields = {
    "start": lambda log: {"label": "Start Timestamp", "type": "date", "value": log.start_time.date().isoformat() if log.start_time else ""},
    "end": lambda log: {"label": "End Timestamp", "type": "date", "value": log.end_time.date().isoformat() if log.end_time else ""},
    "contact": lambda log: {"label": "Contact", "type": "datalist", "value": log.contact.full_name if log.contact else "", "list": "contactList"},
    "item": lambda log: {"label": "Work Item", "type": "datalist", "value": log.work_item.identifier if log.work_item else "", "list": "itemList"},
    "complete": lambda log: {"label": "Complete?", "type": "checkbox", "value": log.complete},
    "followup": lambda log: {"label": "Follow Up?", "type": "checkbox", "value": log.followup},
    "analysis": lambda log: {"label": "Quick Analysis?", "type": "checkbox", "value": log.analysis},
    "notes": lambda log: {"label": "Notes", "type": "textarea", "value": log.notes or "", "rows": 15}
}

def make_paginated_data(
    query,
    page: int,
    per_page=15
):
    model = query.column_descriptions[0]['entity']
    items = (
        query.order_by(model.id)
        .limit(per_page)
        .offset((page - 1) * per_page)
        .all()
    )
    has_next = len(items) == per_page
    has_prev = page > 1
    total_items = query.count()
    total_pages = (total_items + per_page - 1) // per_page 
    return {
        "items": items,
        "has_next": has_next,
        "has_prev": has_prev,
        "total_pages": total_pages,
        "page": page
    }

def render_paginated_table(
    query,
    page: int,
    title: str,
    headers: dict,
    entry_route: str,
    row_fn: Callable[[Any], List[dict]],
    endpoint: str,
    per_page=15,
    breadcrumb=[],
    extra_args={}
):
    data = make_paginated_data(query, page, per_page)
    return render_template(
        "table.html",
        header=headers.keys(),
        rows=[{"id": item.id, "cells": row_fn(item)} for item in data['items']],
        title=title,
        has_next=data['has_next'],
        has_prev=data['has_prev'],
        page=page,
        endpoint=endpoint,
        total_pages=data['total_pages'],
        headers=headers,
        entry_route=entry_route,
        breadcrumb=breadcrumb,
        extra_args=extra_args
    )

@main.route("/")
def index():
    return render_template("index.html", title="Inventory Manager")

def link(text, endpoint, **values):
    return {"text": text, "url": url_for(endpoint, **values)}

FILTER_MAP = {
    'user': Inventory.owner_id,
    'location': Inventory.location_id,
    'type': Inventory.type_id,
}

@main.route("/inventory")
def list_inventory():
    page = request.args.get('page', default=1, type=int)
    filter_by = request.args.get('filter_by', type=str)
    id = request.args.get('id', type=int)

    filter_name = None

    query = db.session.query(Inventory)
    query = eager_load_inventory_relationships(query)
    query = query.order_by(Inventory.inventory_name, Inventory.barcode, Inventory.serial)

    if filter_by and id:
        column = FILTER_MAP.get(filter_by)
        if column is not None:
            if filter_by == 'user':
                filter_name = db.session.query(User).filter(User.id == id).first().full_name
            elif filter_by == 'location':
                filter_name = db.session.query(Room).filter(Room.id == id).first().full_name
            else:
                filter_name = db.session.query(Item).filter(Item.id == id).first().description
            query = query.filter(column == id)
        else:
            return "Invalid filter_by parameter", 400

    return render_paginated_table(
        query=query,
        page=page,
        title=f"Inventory Listing ({filter_name})" if filter_by else "Inventory Listing",
        headers=inventory_headers,
        row_fn=lambda i: [fn(i) for fn in inventory_headers.values()],
        endpoint="main.list_inventory",
        entry_route="inventory_item",
        breadcrumb=[{'label': 'Inventory', 'url': url_for('main.inventory_index')}],
        extra_args={'filter_by': filter_by, 'id': id}
    )

@main.route("/inventory/index")
def inventory_index():
    category = request.args.get('category')
    listing = None

    if category == 'user':
        users = db.session.query(User.id, User.first_name, User.last_name).order_by(User.first_name, User.last_name).all()
        listing = chunk_list([(user.id, f"{user.first_name or ''} {user.last_name or ''}".strip()) for user in users], 12)
    elif category == 'location':
        rooms = (
            db.session.query(Room.id, Room.name, RoomFunction.description)
            .join(RoomFunction, Room.function_id == RoomFunction.id)
            .order_by(Room.name, RoomFunction.description)
            .all()
        )
        listing = chunk_list([(room.id, f"{room.name or ''} - {room.description or ''}".strip()) for room in rooms], 12)
    elif category == 'type':
        types = db.session.query(Item.id, Item.description).order_by(Item.description).all()
        listing = chunk_list(types, 12)
    elif category:
        return f"Dude, why {category}?"
    
    return render_template('inventory_index.html', title=f"Inventory ({category.capitalize()} Index)" if category else "Inventory", category=category, listing=listing)

@main.route("/inventory_item/<int:id>")
def inventory_item(id):
    worklog_page = request.args.get("worklog_page", default=1, type=int)
    inventory_query = db.session.query(Inventory)
    item = eager_load_inventory_relationships(inventory_query).filter(Inventory.id == id).first()
    brands = db.session.query(Brand).all()
    users = eager_load_user_relationships(db.session.query(User)).all()
    rooms = eager_load_room_relationships(db.session.query(Room)).all()
    worklog_query = db.session.query(WorkLog).filter(WorkLog.work_item_id == id)
    worklog_pagination = make_paginated_data(worklog_query, worklog_page, 5)
    types = db.session.query(Item).all()
    filtered_worklog_headers = {k: v for k, v in worklog_headers.items() if k not in ['Work Item', 'Contact', 'Follow Up?', 'Quick Analysis?']}
    worklog = worklog_pagination['items']

    if item:
        title = f"Inventory Record - {item.identifier}"
    else:
        title = "Inventory Record - Not Found"

    return render_template("inventory.html", title=title, item=item, 
                           brands=brands, users=users, rooms=rooms, 
                           worklog=worklog, 
                           worklog_pagination=worklog_pagination, 
                           worklog_page=worklog_page,
                           worklog_headers=filtered_worklog_headers,
                           worklog_rows=[{"id": log.id, "cells": [fn(log) for fn in filtered_worklog_headers.values()]} for log in worklog],
                           types=types
                        )

@main.route("/users")
def list_users():
    page = request.args.get('page', default=1, type=int)
    query = eager_load_user_relationships(db.session.query(User)).order_by(User.last_name, User.first_name)
    return render_paginated_table(
        query=query,
        page=page,
        title="Users",
        headers=user_headers,
        row_fn=lambda i: [fn(i) for fn in user_headers.values()],
        endpoint="main.list_users",
        entry_route="user"
    )

@main.route("/user/<int:id>")
def user(id):
    asset_page = request.args.get("asset_page", default=1, type=int)
    worklog_page = request.args.get("worklog_page", default=1, type=int)
    users_query = db.session.query(User).order_by(User.first_name, User.last_name)
    users = eager_load_user_relationships(users_query).all()
    user = next((u for u in users if u.id == id), None)
    rooms_query = db.session.query(Room)
    rooms = eager_load_room_relationships(rooms_query).all()
    inventory_query = (
        eager_load_inventory_relationships(db.session.query(Inventory))
        .filter(Inventory.owner_id == id)
        .filter(Inventory.condition.in_(ACTIVE_STATUSES))
    )
    inventory_pagination = make_paginated_data(inventory_query, asset_page, 10)
    inventory = inventory_pagination['items']
    filtered_inventory_headers = {k: v for k, v in inventory_headers.items() if k not in ['Date Entered', 'Inventory #', 'Serial #', 
                                                                                          'Bar Code #', 'Condition', 'Owner', 'Notes',
                                                                                          'Brand', 'Model', 'Shared?', 'Location']}
    worklog_query = eager_load_worklog_relationships(db.session.query(WorkLog)).filter(WorkLog.contact_id == id)
    worklog_pagination = make_paginated_data(worklog_query, worklog_page, 10)
    worklog = worklog_pagination['items']
    filtered_worklog_headers = {k: v for k, v in worklog_headers.items() if k not in ['Contact', 'Follow Up?', 'Quick Analysis?']}
    return render_template(
        "user.html", 
        title=(f"User Record - {user.full_name}" if user.active else f"User Record - {user.full_name} (Inactive)") if user else "User Record - Record Not Found", 
        user=user, users=users, rooms=rooms, assets=inventory, 
        inventory_headers=filtered_inventory_headers,
        inventory_rows=[{"id": item.id, "cells": [fn(item) for fn in filtered_inventory_headers.values()]} for item in inventory],
        inventory_pagination=inventory_pagination,
        asset_page=asset_page,
        worklog=worklog,
        worklog_headers=filtered_worklog_headers,
        worklog_rows=[{"id": log.id, "cells": [fn(log) for fn in filtered_worklog_headers.values()]} for log in worklog],
        worklog_pagination=worklog_pagination,
        worklog_page=worklog_page
    )

@main.route("/worklog")
def list_worklog(page=1):
    page = request.args.get('page', default=1, type=int)
    query = eager_load_worklog_relationships(db.session.query(WorkLog)) 
    return render_paginated_table(
        query=query,
        page=page,
        title="Work Log",
        headers=worklog_headers,
        row_fn=lambda i: [fn(i) for fn in worklog_headers.values()],
        endpoint="main.list_worklog",
        entry_route="worklog_entry"
    )

@main.route("/worklog/<int:id>")
def worklog_entry(id):
    log = eager_load_worklog_relationships(db.session.query(WorkLog)).filter(WorkLog.id == id).first()
    user_query = db.session.query(User)
    users = eager_load_user_relationships(user_query).all()
    item_query = db.session.query(Inventory)
    items = eager_load_inventory_relationships(item_query).all()
    return render_template("worklog.html", title=f"Work Log #{id}", log=log, users=users, items=items, form_fields=worklog_form_fields)

@main.route("/search")
def search():
    query = request.args.get('q', '').strip()
    inventory_page = request.args.get('inventory_page', default=1, type=int)
    user_page = request.args.get('user_page', default=1, type=int)
    worklog_page = request.args.get('worklog_page', default=1, type=int)

    if not query:
        return redirect(url_for('index'))
    
    UserAlias = aliased(User)

    inventory_query = eager_load_inventory_relationships(db.session.query(Inventory).join(UserAlias, Inventory.owner)).filter(
        or_(
            Inventory.inventory_name.ilike(f"%{query}%"),
            Inventory.serial.ilike(f"%{query}%"),
            Inventory.barcode.ilike(f"%{query}%"),
            Inventory.notes.ilike(f"%{query}%"),
            UserAlias.first_name.ilike(f"%{query}%"),
            UserAlias.last_name.ilike(f"%{query}%")
        ))
    inventory_pagination = make_paginated_data(inventory_query, inventory_page)
    user_query = eager_load_user_relationships(db.session.query(User)).filter(
        or_(
            User.first_name.ilike(f"%{query}%"),
            User.last_name.ilike(f"%{query}%")
        ))
    user_pagination = make_paginated_data(user_query, user_page)
    worklog_query = eager_load_worklog_relationships(db.session.query(WorkLog).join(UserAlias, WorkLog.contact)).filter(
        or_(
            WorkLog.notes.ilike(f"%{query}%"),
            UserAlias.first_name.ilike(f"%{query}%"),
            UserAlias.last_name.ilike(f"%{query}%")
        ))
    worklog_pagination = make_paginated_data(worklog_query, worklog_page)
    
    results = {
        'inventory': {
            'results': inventory_query, 
            'headers': inventory_headers, 
            'rows': [{"id": item.id, "cells": [fn(item) for fn in inventory_headers.values()]} for item in inventory_pagination['items']],
            'pagination': inventory_pagination
        },
        'users': {
            'results': user_query, 
            'headers': user_headers, 
            'rows': [{"id": user.id, "cells": [fn(user) for fn in user_headers.values()]} for user in user_pagination['items']],
            'pagination': user_pagination
        },
        'worklog': {
            'results': worklog_query, 
            'headers': worklog_headers, 
            'rows': [{"id": log.id, "cells": [fn(log) for fn in worklog_headers.values()]} for log in worklog_pagination['items']],
            'pagination': worklog_pagination
        }
    }

    return render_template('search.html', title="Database Search", results=results, query=query)