# =============================================================================
# WOOO TECH - Monitor Dashboard
# Nginx 配置 - UAT Server (192.168.0.110)
# 所有監控工具統一入口
# =============================================================================

# 上游服務定義
upstream grafana_backend {
    server 127.0.0.1:3000;
}

upstream prometheus_backend {
    server 127.0.0.1:9090;
}

upstream alertmanager_backend {
    server 127.0.0.1:9093;
}

upstream portainer_backend {
    server 127.0.0.1:9000;
}

upstream n8n_backend {
    server 127.0.0.1:5678;
}

upstream pgadmin_backend {
    server 127.0.0.1:8088;
}

upstream gitlab_backend {
    server 127.0.0.1:8929;
}

upstream nextcloud_backend {
    server 127.0.0.1:8081;
}

upstream loki_backend {
    server 127.0.0.1:3100;
}

# K8s Grafana (NodePort)
upstream k8s_grafana_backend {
    server 127.0.0.1:30030;
}

# Rancher (K8s 管理平台)
upstream rancher_backend {
    server 127.0.0.1:8443;
}

# =============================================================================
# monitor.wooo.work - 監控入口 (HTTP -> HTTPS 重定向)
# =============================================================================
server {
    listen 80;
    server_name monitor.wooo.work;
    return 301 https://$server_name$request_uri;
}

# =============================================================================
# monitor.wooo.work - 監控入口 (HTTPS)
# =============================================================================
server {
    listen 443 ssl http2;
    server_name monitor.wooo.work;

    # SSL 證書
    ssl_certificate /etc/letsencrypt/live/monitor.wooo.work/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/monitor.wooo.work/privkey.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    # 監控首頁 (靜態頁面)
    root /var/www/monitor;
    index index.html;

    # 首頁
    location = / {
        try_files /index.html =404;
    }

    # =========================================================================
    # Docker Grafana (Port 3000)
    # Grafana 配置了 GF_SERVER_SERVE_FROM_SUB_PATH=true
    # 必須保留 /grafana/ 路徑傳給 Grafana
    # =========================================================================
    location /grafana/ {
        proxy_pass http://grafana_backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # WebSocket 支援
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    # =========================================================================
    # K8s Grafana (NodePort 30030)
    # 需要 rewrite 因為 K8s Grafana 沒有配置子路徑
    # 建議直接訪問 http://192.168.0.110:30030
    # =========================================================================
    location /k8s-grafana/ {
        proxy_pass http://k8s_grafana_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 重寫 Location header 中的重定向路徑
        proxy_redirect / /k8s-grafana/;

        # WebSocket 支援
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # 替換回應中的路徑
        sub_filter_once off;
        sub_filter_types text/html application/javascript;
        sub_filter 'href="/' 'href="/k8s-grafana/';
        sub_filter 'src="/' 'src="/k8s-grafana/';
        sub_filter '"/api/' '"/k8s-grafana/api/';
    }

    # =========================================================================
    # Prometheus (Port 9090)
    # 需要配置 --web.external-url 才能完美支援子路徑
    # =========================================================================
    location /prometheus/ {
        proxy_pass http://prometheus_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # 重寫重定向
        proxy_redirect / /prometheus/;
    }

    # =========================================================================
    # Alertmanager (Port 9093)
    # =========================================================================
    location /alertmanager/ {
        proxy_pass http://alertmanager_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_redirect / /alertmanager/;
    }

    # =========================================================================
    # Portainer (Port 9000)
    # =========================================================================
    location /portainer/ {
        proxy_pass http://portainer_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # WebSocket 支援
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    # Portainer API
    location /portainer/api/ {
        proxy_pass http://portainer_backend/api/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    # =========================================================================
    # n8n (Port 5678)
    # 需要設置 N8N_PATH_PREFIX 環境變數
    # =========================================================================
    location /n8n/ {
        proxy_pass http://n8n_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # WebSocket 支援 (n8n 需要)
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # 較長的超時時間 (n8n 工作流可能需要)
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
    }

    # =========================================================================
    # pgAdmin (Port 8088)
    # 需要設置 SCRIPT_NAME 環境變數
    # =========================================================================
    location /pgadmin/ {
        proxy_pass http://pgadmin_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Script-Name /pgadmin;

        proxy_redirect off;
    }

    # =========================================================================
    # Loki (Port 3100) - 僅 API
    # =========================================================================
    location /loki/ {
        proxy_pass http://loki_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    # =========================================================================
    # Rancher (Port 8443) - K8s 管理平台
    # 注意：Rancher 不支援子路徑，建議直接訪問 https://192.168.0.110:8443
    # =========================================================================
    location /rancher/ {
        proxy_pass https://rancher_backend/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # SSL 後端
        proxy_ssl_verify off;

        # WebSocket 支援
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # 較長的超時時間
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
    }
}

# =============================================================================
# gitlab.wooo.work - GitLab (僅 HTTP，無公網 DNS)
# =============================================================================
server {
    listen 80;
    server_name gitlab.wooo.work;

    location / {
        proxy_pass http://gitlab_backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # GitLab 需要較大的緩衝區
        proxy_buffers 8 32k;
        proxy_buffer_size 64k;
        client_max_body_size 0;
        proxy_read_timeout 600s;
    }
}

# =============================================================================
# cloud.wooo.work - Nextcloud (僅 HTTP，無公網 DNS)
# =============================================================================
server {
    listen 80;
    server_name cloud.wooo.work;

    location / {
        proxy_pass http://nextcloud_backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        client_max_body_size 10G;
        proxy_read_timeout 600s;
    }
}