# lua_package_path '/usr/share/lua/5.1/?.lua;;';

server {
  listen 8080 default_server;
  root /var/www/html/;
  index index.html;
  
  location / {
    add_header 'Access-Control-Allow-Origin' '*';
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
    add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
    add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
    try_files $uri $uri/ =404;
    add_header Last-Modified $date_gmt;
    if_modified_since off;
    expires off;
    etag off;
  }

  location /kube/pods {
    access_by_lua_file "/usr/local/openresty/nginx/conf/kubeinvaders/pod.lua";
  }

  location /kube/delete/pods {
    access_by_lua_file "/usr/local/openresty/nginx/conf/kubeinvaders/pod.lua";
  }

  location /kube/nodes {
    access_by_lua_file "/usr/local/openresty/nginx/conf/kubeinvaders/node.lua";
  }

  location /kube/chaos/nodes {
    access_by_lua_file "/usr/local/openresty/nginx/conf/kubeinvaders/chaos-node.lua";
  }

  location /kube/endpoint {
    content_by_lua_block {
      ngx.header['Access-Control-Allow-Origin'] = '*'
      ngx.header['Access-Control-Allow-Methods'] = 'GET, POST, OPTIONS'
      ngx.header['Access-Control-Allow-Headers'] = 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range'
      ngx.header['Access-Control-Expose-Headers'] = 'Content-Length,Content-Range';
      -- TO DO
      -- Check when ENDPOINT is nil
      ngx.say(os.getenv("ENDPOINT"))
    }  
  }

  location /kube/namespaces {
    content_by_lua_block {
      ngx.header['Access-Control-Allow-Origin'] = '*'
      ngx.header['Access-Control-Allow-Methods'] = 'GET, POST, OPTIONS'
      ngx.header['Access-Control-Allow-Headers'] = 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range'
      ngx.header['Access-Control-Expose-Headers'] = 'Content-Length,Content-Range';
      -- TO DO
      -- Check when NAMESPACE is nil
      ngx.say(os.getenv("NAMESPACE"))
    }  
  }

  location /metrics {
    default_type text/html;
    content_by_lua_block {
      local redis = require "resty.redis"
      local red = redis:new()

      -- local okredis, errredis = red:connect(os.getenv("REDIS_HOST"), 6379)
      local okredis, errredis = red:connect("unix:/tmp/redis.sock")

      for i, res in ipairs(red:keys("*")) do
        ngx.log(ngx.ERR, res)
        
        if string.find(res, "chaos_node_jobs_total_on") then
          node = string.gsub(res, "chaos_node_jobs_total_on_", "")
          metric = "chaos_jobs_node_count{node=\"".. node .."\"}"
          ngx.say(metric ..  " " .. red:get(res))
        
        elseif string.find(res, "deleted_pods_total_on")  then
          namespace = string.gsub(res, "deleted_pods_total_on_", "")
          metric = "deleted_namespace_pods_count{namespace=\"".. namespace .."\"}"
          ngx.say(metric ..  " " .. red:get(res))
        else
          ngx.say(res ..  " " .. red:get(res))
        end
      end
    }
  }

  location /kube/kube-linter {
    default_type text/html;
    content_by_lua_block {
      local arg = ngx.req.get_uri_args()
      ngx.req.read_body()
      local request_body = ngx.req.get_body_data()  
      local handle = io.popen("/opt/kube-linter-parser.sh " .. arg['k8s_url'] .. " " .. arg['namespace'] .. " " .. arg['pod_name'] .. " " ..  arg['token'])
      local result = handle:read("*a")
      ngx.say(result)
    }
  }

  location /kube/chaos/containers {
    lua_need_request_body 'on';
    access_by_lua_file "/usr/local/openresty/nginx/conf/kubeinvaders/chaos-containers.lua";
  }
}