-- SeCu Database Schema
-- Version: 1.0.0

-- Enable UUID extension
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- Organizations
CREATE TABLE IF NOT EXISTS organizations (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    name VARCHAR(255) NOT NULL,
    slug VARCHAR(100) NOT NULL UNIQUE,
    settings JSONB DEFAULT '{}',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Users
CREATE TABLE IF NOT EXISTS users (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    org_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    email VARCHAR(255) NOT NULL,
    password_hash VARCHAR(255) NOT NULL,
    role VARCHAR(20) NOT NULL CHECK (role IN ('chef', 'disponent', 'mitarbeiter')),
    first_name VARCHAR(100) NOT NULL,
    last_name VARCHAR(100) NOT NULL,
    phone VARCHAR(50),
    avatar_url TEXT,
    created_by UUID REFERENCES users(id),
    managed_by UUID REFERENCES users(id),
    active BOOLEAN DEFAULT true,
    last_login TIMESTAMP WITH TIME ZONE,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(org_id, email)
);

-- Refresh Tokens
CREATE TABLE IF NOT EXISTS refresh_tokens (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    token_hash VARCHAR(255) NOT NULL,
    expires_at TIMESTAMP WITH TIME ZONE NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Orders (Aufträge)
CREATE TABLE IF NOT EXISTS orders (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    org_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    number SERIAL,
    title VARCHAR(255) NOT NULL,
    description TEXT,
    location VARCHAR(255),
    address TEXT,
    client_name VARCHAR(255),
    client_contact VARCHAR(255),
    status VARCHAR(20) NOT NULL DEFAULT 'draft' CHECK (status IN ('draft', 'published', 'in_progress', 'completed', 'cancelled')),
    start_time TIMESTAMP WITH TIME ZONE,
    end_time TIMESTAMP WITH TIME ZONE,
    required_staff INTEGER DEFAULT 1,
    special_instructions TEXT,
    created_by UUID REFERENCES users(id),
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Order Assignments (Mitarbeiter-Zuweisung)
CREATE TABLE IF NOT EXISTS order_assignments (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    order_id UUID NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    status VARCHAR(20) NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'confirmed', 'declined', 'completed')),
    note TEXT,
    confirmed_at TIMESTAMP WITH TIME ZONE,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(order_id, user_id)
);

-- Availability (Verfügbarkeit)
CREATE TABLE IF NOT EXISTS availability (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    date DATE NOT NULL,
    available BOOLEAN NOT NULL DEFAULT true,
    time_from TIME,
    time_to TIME,
    note TEXT,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(user_id, date)
);

-- Timesheets (Stundenzettel)
CREATE TABLE IF NOT EXISTS timesheets (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    order_id UUID REFERENCES orders(id) ON DELETE SET NULL,
    work_date DATE NOT NULL,
    start_time TIME,
    end_time TIME,
    hours_worked DECIMAL(5,2),
    photo_url TEXT,
    status VARCHAR(20) NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'approved', 'rejected')),
    approved_by UUID REFERENCES users(id),
    rejection_reason TEXT,
    approved_at TIMESTAMP WITH TIME ZONE,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Modules (für modulares System)
CREATE TABLE IF NOT EXISTS modules (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    name VARCHAR(100) NOT NULL UNIQUE,
    display_name VARCHAR(255) NOT NULL,
    description TEXT,
    is_core BOOLEAN DEFAULT false,
    default_config JSONB DEFAULT '{}',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Organization Modules (welche Module aktiviert)
CREATE TABLE IF NOT EXISTS organization_modules (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    org_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    module_id UUID NOT NULL REFERENCES modules(id) ON DELETE CASCADE,
    enabled BOOLEAN DEFAULT true,
    config JSONB DEFAULT '{}',
    enabled_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(org_id, module_id)
);

-- Indexes for performance
CREATE INDEX IF NOT EXISTS idx_users_org_id ON users(org_id);
CREATE INDEX IF NOT EXISTS idx_users_email ON users(email);
CREATE INDEX IF NOT EXISTS idx_users_role ON users(role);
CREATE INDEX IF NOT EXISTS idx_users_managed_by ON users(managed_by);
CREATE INDEX IF NOT EXISTS idx_orders_org_id ON orders(org_id);
CREATE INDEX IF NOT EXISTS idx_orders_status ON orders(status);
CREATE INDEX IF NOT EXISTS idx_orders_start_time ON orders(start_time);
CREATE INDEX IF NOT EXISTS idx_order_assignments_order_id ON order_assignments(order_id);
CREATE INDEX IF NOT EXISTS idx_order_assignments_user_id ON order_assignments(user_id);
CREATE INDEX IF NOT EXISTS idx_availability_user_id ON availability(user_id);
CREATE INDEX IF NOT EXISTS idx_availability_date ON availability(date);
CREATE INDEX IF NOT EXISTS idx_timesheets_user_id ON timesheets(user_id);
CREATE INDEX IF NOT EXISTS idx_timesheets_work_date ON timesheets(work_date);
CREATE INDEX IF NOT EXISTS idx_timesheets_status ON timesheets(status);
CREATE INDEX IF NOT EXISTS idx_refresh_tokens_user_id ON refresh_tokens(user_id);

-- Seed data: Core modules
INSERT INTO modules (name, display_name, description, is_core) VALUES
    ('core', 'Kernfunktionen', 'Authentifizierung und Benutzerverwaltung', true),
    ('orders', 'Auftragsverwaltung', 'Erstellen und Verwalten von Aufträgen', true),
    ('availability', 'Verfügbarkeit', 'Mitarbeiter-Verfügbarkeitsplanung', false),
    ('timesheets', 'Stundenzettel', 'Zeiterfassung und Stundenzettel-Upload', false),
    ('developer', 'Entwickler-Panel', 'Fernverwaltung und Modul-Konfiguration', false)
ON CONFLICT (name) DO NOTHING;

-- Create a default demo organization
INSERT INTO organizations (name, slug) VALUES
    ('Demo Organisation', 'demo')
ON CONFLICT (slug) DO NOTHING;