# 🗄️ Datenbank

Dokumentation der PostgreSQL-Datenbank des Ninja Cross Parkour Systems.

## 📋 Inhaltsverzeichnis

- [🏗️ Schema-Übersicht](#️-schema-übersicht)
- [📊 Tabellen](#-tabellen)
- [🔗 Beziehungen](#-beziehungen)
- [📈 Indizes](#-indizes)
- [🔧 Funktionen](#-funktionen)
- [📊 Statistiken](#-statistiken)
- [🛠️ Wartung](#️-wartung)

## 🏗️ Schema-Übersicht

### Datenbank-Name
`ninjaserver`

### Zeichensatz
`UTF-8`

### Zeitzone
`Europe/Berlin`

### Version
PostgreSQL 12 oder höher

## 📊 Tabellen

### `players` - Spieler
```sql
CREATE TABLE players (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    firstname VARCHAR(50) NOT NULL,
    lastname VARCHAR(50) NOT NULL,
    birthdate DATE NOT NULL,
    rfiduid VARCHAR(20) UNIQUE,
    supabase_user_id UUID,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
```

**Beschreibung:** Speichert alle Spieler-Informationen.

**Felder:**
- `id` - Eindeutige UUID
- `firstname` - Vorname (max. 50 Zeichen)
- `lastname` - Nachname (max. 50 Zeichen)
- `birthdate` - Geburtsdatum
- `rfiduid` - RFID-Karten-ID (eindeutig)
- `supabase_user_id` - Verknüpfung zu Supabase
- `created_at` - Erstellungszeitpunkt
- `updated_at` - Letzte Aktualisierung

### `locations` - Standorte
```sql
CREATE TABLE locations (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(255) UNIQUE NOT NULL,
    latitude DECIMAL(10, 8) NOT NULL,
    longitude DECIMAL(11, 8) NOT NULL,
    time_threshold JSONB DEFAULT '{"seconds": 120}',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
```

**Beschreibung:** Speichert alle Parkour-Standorte.

**Felder:**
- `id` - Eindeutige UUID
- `name` - Standortname (eindeutig)
- `latitude` - Breitengrad (10,8 Dezimalstellen)
- `longitude` - Längengrad (11,8 Dezimalstellen)
- `time_threshold` - Zeit-Schwelle als JSON
- `created_at` - Erstellungszeitpunkt
- `updated_at` - Letzte Aktualisierung

### `times` - Zeiten
```sql
CREATE TABLE times (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    player_id UUID REFERENCES players(id) ON DELETE CASCADE,
    location_id UUID REFERENCES locations(id) ON DELETE CASCADE,
    recorded_time JSONB NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
```

**Beschreibung:** Speichert alle gemessenen Zeiten.

**Felder:**
- `id` - Eindeutige UUID
- `player_id` - Verweis auf Spieler
- `location_id` - Verweis auf Standort
- `recorded_time` - Zeit als JSON (Sekunden, Minuten, Millisekunden)
- `created_at` - Erstellungszeitpunkt

### `achievements` - Achievements
```sql
CREATE TABLE achievements (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(255) NOT NULL,
    description TEXT,
    category VARCHAR(50) NOT NULL,
    condition_type VARCHAR(50) NOT NULL,
    condition_value INTEGER NOT NULL,
    icon VARCHAR(10),
    points INTEGER DEFAULT 0,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
```

**Beschreibung:** Definiert alle verfügbaren Achievements.

**Felder:**
- `id` - Eindeutige UUID
- `name` - Achievement-Name
- `description` - Beschreibung
- `category` - Kategorie (consistency, improvement, seasonal, monthly)
- `condition_type` - Bedingungstyp
- `condition_value` - Bedingungswert
- `icon` - Emoji-Icon
- `points` - Punkte
- `is_active` - Aktiv-Status
- `created_at` - Erstellungszeitpunkt
- `updated_at` - Letzte Aktualisierung

### `player_achievements` - Spieler-Achievements
```sql
CREATE TABLE player_achievements (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    player_id UUID REFERENCES players(id) ON DELETE CASCADE,
    achievement_id UUID REFERENCES achievements(id) ON DELETE CASCADE,
    earned_at TIMESTAMP,
    progress INTEGER DEFAULT 0,
    is_completed BOOLEAN DEFAULT false,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(player_id, achievement_id)
);
```

**Beschreibung:** Verknüpft Spieler mit ihren Achievements.

**Felder:**
- `id` - Eindeutige UUID
- `player_id` - Verweis auf Spieler
- `achievement_id` - Verweis auf Achievement
- `earned_at` - Zeitpunkt der Verleihung
- `progress` - Fortschritt (0-100)
- `is_completed` - Abgeschlossen-Status
- `created_at` - Erstellungszeitpunkt

### `adminusers` - Admin-Benutzer
```sql
CREATE TABLE adminusers (
    id SERIAL PRIMARY KEY,
    username VARCHAR(50) UNIQUE NOT NULL,
    password_hash VARCHAR(255) NOT NULL,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    last_login TIMESTAMP
);
```

**Beschreibung:** Speichert Admin-Benutzer für das System.

**Felder:**
- `id` - Auto-increment ID
- `username` - Benutzername (eindeutig)
- `password_hash` - Gehashtes Passwort
- `is_active` - Aktiv-Status
- `created_at` - Erstellungszeitpunkt
- `last_login` - Letzter Login

### `api_tokens` - API-Tokens
```sql
CREATE TABLE api_tokens (
    id SERIAL PRIMARY KEY,
    token VARCHAR(255) UNIQUE NOT NULL,
    description TEXT,
    standorte TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    expires_at TIMESTAMP,
    is_active BOOLEAN DEFAULT true
);
```

**Beschreibung:** Speichert API-Tokens für Authentifizierung.

**Felder:**
- `id` - Auto-increment ID
- `token` - API-Token (eindeutig)
- `description` - Beschreibung
- `standorte` - Zugewiesene Standorte
- `created_at` - Erstellungszeitpunkt
- `expires_at` - Ablaufzeitpunkt
- `is_active` - Aktiv-Status

### `page_views` - Seitenaufrufe
```sql
CREATE TABLE page_views (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    page VARCHAR(255) NOT NULL,
    user_agent TEXT,
    ip_address INET,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
```

**Beschreibung:** Verfolgt Seitenaufrufe für Statistiken.

**Felder:**
- `id` - Eindeutige UUID
- `page` - Seitenname
- `user_agent` - Browser-Informationen
- `ip_address` - IP-Adresse
- `created_at` - Zeitpunkt des Aufrufs

## 🔗 Beziehungen

### Foreign Key Constraints
```sql
-- times -> players
ALTER TABLE times 
ADD CONSTRAINT fk_times_player 
FOREIGN KEY (player_id) REFERENCES players(id) ON DELETE CASCADE;

-- times -> locations
ALTER TABLE times 
ADD CONSTRAINT fk_times_location 
FOREIGN KEY (location_id) REFERENCES locations(id) ON DELETE CASCADE;

-- player_achievements -> players
ALTER TABLE player_achievements 
ADD CONSTRAINT fk_player_achievements_player 
FOREIGN KEY (player_id) REFERENCES players(id) ON DELETE CASCADE;

-- player_achievements -> achievements
ALTER TABLE player_achievements 
ADD CONSTRAINT fk_player_achievements_achievement 
FOREIGN KEY (achievement_id) REFERENCES achievements(id) ON DELETE CASCADE;
```

### Beziehungsdiagramm
```
players (1) -----> (N) times
players (1) -----> (N) player_achievements
locations (1) ---> (N) times
achievements (1) -> (N) player_achievements
```

## 📈 Indizes

### Primäre Indizes
```sql
-- Primärschlüssel (automatisch)
CREATE UNIQUE INDEX idx_players_pkey ON players(id);
CREATE UNIQUE INDEX idx_locations_pkey ON locations(id);
CREATE UNIQUE INDEX idx_times_pkey ON times(id);
CREATE UNIQUE INDEX idx_achievements_pkey ON achievements(id);
CREATE UNIQUE INDEX idx_player_achievements_pkey ON player_achievements(id);
```

### Performance-Indizes
```sql
-- Zeiten-Indizes
CREATE INDEX idx_times_player_id ON times(player_id);
CREATE INDEX idx_times_location_id ON times(location_id);
CREATE INDEX idx_times_created_at ON times(created_at);
CREATE INDEX idx_times_player_created ON times(player_id, created_at DESC);

-- Achievement-Indizes
CREATE INDEX idx_player_achievements_player_id ON player_achievements(player_id);
CREATE INDEX idx_player_achievements_achievement_id ON player_achievements(achievement_id);
CREATE INDEX idx_player_achievements_completed ON player_achievements(is_completed) WHERE is_completed = true;

-- Standort-Indizes
CREATE INDEX idx_locations_name ON locations(name);
CREATE INDEX idx_locations_coordinates ON locations(latitude, longitude);

-- Spieler-Indizes
CREATE INDEX idx_players_rfiduid ON players(rfiduid);
CREATE INDEX idx_players_supabase_user_id ON players(supabase_user_id);
CREATE INDEX idx_players_name ON players(firstname, lastname);

-- API-Token-Indizes
CREATE INDEX idx_api_tokens_token ON api_tokens(token);
CREATE INDEX idx_api_tokens_active ON api_tokens(is_active) WHERE is_active = true;

-- Seitenaufruf-Indizes
CREATE INDEX idx_page_views_page ON page_views(page);
CREATE INDEX idx_page_views_created_at ON page_views(created_at);
```

### Composite-Indizes
```sql
-- Für häufige Abfragen
CREATE INDEX idx_times_player_location_time ON times(player_id, location_id, created_at DESC);
CREATE INDEX idx_player_achievements_player_completed ON player_achievements(player_id, is_completed);
CREATE INDEX idx_achievements_category_active ON achievements(category, is_active);
```

## 🔧 Funktionen

### Achievement-Funktionen
```sql
-- Konsistenz-basierte Achievements prüfen
CREATE OR REPLACE FUNCTION check_consistency_achievements(player_uuid UUID)
RETURNS INTEGER AS $$
DECLARE
    awarded_count INTEGER := 0;
    total_runs INTEGER;
    runs_today INTEGER;
    unique_days INTEGER;
BEGIN
    -- Gesamtläufe zählen
    SELECT COUNT(*) INTO total_runs
    FROM times WHERE player_id = player_uuid;
    
    -- Läufe heute zählen
    SELECT COUNT(*) INTO runs_today
    FROM times 
    WHERE player_id = player_uuid 
    AND DATE(created_at) = CURRENT_DATE;
    
    -- Verschiedene Tage zählen
    SELECT COUNT(DISTINCT DATE(created_at)) INTO unique_days
    FROM times WHERE player_id = player_uuid;
    
    -- Achievements vergeben
    -- (Detaillierte Logik hier...)
    
    RETURN awarded_count;
END;
$$ LANGUAGE plpgsql;

-- Verbesserungs-basierte Achievements prüfen
CREATE OR REPLACE FUNCTION check_improvement_achievements(player_uuid UUID)
RETURNS INTEGER AS $$
-- (Implementierung...)
$$ LANGUAGE plpgsql;

-- Saisonale Achievements prüfen
CREATE OR REPLACE FUNCTION check_seasonal_achievements(player_uuid UUID)
RETURNS INTEGER AS $$
-- (Implementierung...)
$$ LANGUAGE plpgsql;

-- Alle Achievements prüfen
CREATE OR REPLACE FUNCTION check_all_achievements(player_uuid UUID)
RETURNS INTEGER AS $$
DECLARE
    total_awarded INTEGER := 0;
BEGIN
    total_awarded := total_awarded + check_consistency_achievements(player_uuid);
    total_awarded := total_awarded + check_improvement_achievements(player_uuid);
    total_awarded := total_awarded + check_seasonal_achievements(player_uuid);
    
    RETURN total_awarded;
END;
$$ LANGUAGE plpgsql;
```

### Utility-Funktionen
```sql
-- Beste Zeit eines Spielers ermitteln
CREATE OR REPLACE FUNCTION get_best_time(player_uuid UUID)
RETURNS JSONB AS $$
DECLARE
    best_time JSONB;
BEGIN
    SELECT recorded_time INTO best_time
    FROM times
    WHERE player_id = player_uuid
    ORDER BY (recorded_time->>'seconds')::INTEGER ASC
    LIMIT 1;
    
    RETURN COALESCE(best_time, '{"seconds": 0, "minutes": 0, "milliseconds": 0}');
END;
$$ LANGUAGE plpgsql;

-- Spieler-Statistiken berechnen
CREATE OR REPLACE FUNCTION get_player_stats(player_uuid UUID)
RETURNS JSONB AS $$
DECLARE
    stats JSONB;
    total_runs INTEGER;
    best_time JSONB;
    avg_time JSONB;
BEGIN
    SELECT COUNT(*) INTO total_runs FROM times WHERE player_id = player_uuid;
    SELECT get_best_time(player_uuid) INTO best_time;
    
    -- Durchschnittszeit berechnen
    SELECT jsonb_build_object(
        'seconds', AVG((recorded_time->>'seconds')::INTEGER),
        'minutes', AVG((recorded_time->>'minutes')::INTEGER),
        'milliseconds', AVG((recorded_time->>'milliseconds')::INTEGER)
    ) INTO avg_time
    FROM times WHERE player_id = player_uuid;
    
    stats := jsonb_build_object(
        'total_runs', total_runs,
        'best_time', best_time,
        'average_time', avg_time
    );
    
    RETURN stats;
END;
$$ LANGUAGE plpgsql;
```

## 📊 Statistiken

### Datenbank-Größe
```sql
-- Gesamtgröße der Datenbank
SELECT pg_size_pretty(pg_database_size('ninjaserver')) as database_size;

-- Größe der einzelnen Tabellen
SELECT 
    schemaname,
    tablename,
    pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename)) as size
FROM pg_tables 
WHERE schemaname = 'public'
ORDER BY pg_total_relation_size(schemaname||'.'||tablename) DESC;
```

### Tabellen-Statistiken
```sql
-- Anzahl der Datensätze pro Tabelle
SELECT 
    'players' as table_name, COUNT(*) as record_count FROM players
UNION ALL
SELECT 'locations', COUNT(*) FROM locations
UNION ALL
SELECT 'times', COUNT(*) FROM times
UNION ALL
SELECT 'achievements', COUNT(*) FROM achievements
UNION ALL
SELECT 'player_achievements', COUNT(*) FROM player_achievements
UNION ALL
SELECT 'adminusers', COUNT(*) FROM adminusers
UNION ALL
SELECT 'api_tokens', COUNT(*) FROM api_tokens
UNION ALL
SELECT 'page_views', COUNT(*) FROM page_views;
```

### Performance-Statistiken
```sql
-- Langsamste Queries
SELECT 
    query,
    calls,
    total_time,
    mean_time,
    rows
FROM pg_stat_statements 
ORDER BY mean_time DESC 
LIMIT 10;

-- Index-Nutzung
SELECT 
    schemaname,
    tablename,
    indexname,
    idx_scan,
    idx_tup_read,
    idx_tup_fetch
FROM pg_stat_user_indexes 
ORDER BY idx_scan DESC;
```

## 🛠️ Wartung

### Backup
```bash
# Vollständiges Backup
pg_dump -h localhost -U username -d ninjaserver > ninjaserver_backup.sql

# Nur Schema
pg_dump -h localhost -U username -d ninjaserver --schema-only > schema_backup.sql

# Nur Daten
pg_dump -h localhost -U username -d ninjaserver --data-only > data_backup.sql

# Komprimiertes Backup
pg_dump -h localhost -U username -d ninjaserver | gzip > ninjaserver_backup.sql.gz
```

### Wiederherstellung
```bash
# Vollständige Wiederherstellung
psql -h localhost -U username -d ninjaserver < ninjaserver_backup.sql

# Schema wiederherstellen
psql -h localhost -U username -d ninjaserver < schema_backup.sql

# Daten wiederherstellen
psql -h localhost -U username -d ninjaserver < data_backup.sql
```

### Wartungsaufgaben
```sql
-- Tabellen analysieren
ANALYZE;

-- Indizes neu aufbauen
REINDEX DATABASE ninjaserver;

-- Vakuum durchführen
VACUUM ANALYZE;

-- Speicher freigeben
VACUUM FULL;
```

### Monitoring
```sql
-- Aktive Verbindungen
SELECT 
    pid,
    usename,
    application_name,
    client_addr,
    state,
    query_start,
    query
FROM pg_stat_activity 
WHERE state = 'active';

-- Locks
SELECT 
    pid,
    mode,
    locktype,
    relation::regclass,
    granted
FROM pg_locks 
WHERE NOT granted;

-- Wartende Queries
SELECT 
    pid,
    usename,
    application_name,
    state,
    query_start,
    query
FROM pg_stat_activity 
WHERE state = 'waiting';
```

### Sicherheit
```sql
-- Benutzerrechte prüfen
SELECT 
    usename,
    usesuper,
    usecreatedb,
    usebypassrls
FROM pg_user;

-- Tabellenrechte prüfen
SELECT 
    schemaname,
    tablename,
    tableowner
FROM pg_tables 
WHERE schemaname = 'public';

-- Verbindungslimits
SELECT 
    usename,
    connlimit
FROM pg_user;
```

---

**Hinweis:** Für detaillierte API-Dokumentation siehe [API Referenz](API-Referenz) und für Achievement-Details siehe [Achievement System](Achievement-System).