from flask import Flask, render_template, redirect, url_for, flash
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///projektmanagement.db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['SECRET_KEY'] = 'dein_sicherer_geheimer_schlüssel'  # Anpassen für Produktionsumgebung

db = SQLAlchemy(app)

# Datenbankmodelle
class Project(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    status = db.Column(db.String(50), nullable=False)

class TeamMember(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    avatar = db.Column(db.String(200), nullable=False)
    tasks_completed = db.Column(db.Integer, nullable=False)
    performance = db.Column(db.Integer, nullable=False)

class Activity(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    user = db.Column(db.String(100), nullable=False)
    action = db.Column(db.String(50), nullable=False)
    item = db.Column(db.String(100), nullable=False)
    timestamp = db.Column(db.DateTime, default=datetime.utcnow)

class Resource(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    allocation = db.Column(db.Integer, nullable=False)

class Risk(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    level = db.Column(db.String(50), nullable=False)
    color = db.Column(db.String(20), nullable=False)

# Initialisierung der Datenbank
def initialize_database():
    with app.app_context():
        db.create_all()
        # Nur Beispiel-Daten hinzufügen, falls Datenbank leer ist
        if not Project.query.first():
            db.session.add_all([
                Project(name="Projekt A", status="active"),
                Project(name="Projekt B", status="completed"),
                Project(name="Projekt C", status="overdue")
            ])
            db.session.add_all([
                TeamMember(name="Max Mustermann", avatar="https://via.placeholder.com/40", tasks_completed=5, performance=75),
                TeamMember(name="Anna Müller", avatar="https://via.placeholder.com/40", tasks_completed=3, performance=50),
                TeamMember(name="Erik Schmidt", avatar="https://via.placeholder.com/40", tasks_completed=8, performance=90)
            ])
            db.session.add_all([
                Activity(user="Max Mustermann", action="erstellt", item="Projekt A"),
                Activity(user="Anna Müller", action="aktualisiert", item="Projekt B"),
                Activity(user="Erik Schmidt", action="gelöscht", item="Aufgabe 3")
            ])
            db.session.add_all([
                Resource(name="Entwicklung", allocation=80),
                Resource(name="Marketing", allocation=60),
                Resource(name="Vertrieb", allocation=40)
            ])
            db.session.add_all([
                Risk(name="Budgetüberschreitung", level="Mittel", color="bg-yellow-500"),
                Risk(name="Zeitverzögerung", level="Hoch", color="bg-red-500"),
                Risk(name="Ressourcenmangel", level="Niedrig", color="bg-green-500")
            ])
            db.session.commit()

# Hilfsfunktionen für Statistiken
def get_active_projects():
    return Project.query.filter_by(status="active").count()

def get_completed_projects():
    return Project.query.filter_by(status="completed").count()

def get_overdue_tasks():
    return Project.query.filter_by(status="overdue").count()

def get_task_progress():
    total = Project.query.count()
    completed = get_completed_projects()
    return round((completed / total) * 100) if total > 0 else 0

@app.route("/")
def dashboard():
    # Holt Daten aus der Datenbank und gibt sie an das Template weiter
    return render_template("dashboard.html",
                           active_projects=get_active_projects(),
                           completed_projects=get_completed_projects(),
                           overdue_tasks=get_overdue_tasks(),
                           task_progress=get_task_progress(),
                           team_performance=TeamMember.query.all(),
                           recent_activities=Activity.query.order_by(Activity.timestamp.desc()).all(),
                           resources=Resource.query.all(),
                           risks=Risk.query.all())

if __name__ == "__main__":
    initialize_database()  # Initialisiert die Datenbank beim ersten Start
    app.run(debug=False, host='0.0.0.0')