local app = require("lapis").Application()
local sse = require("lib.sse")

local db = require("lapis.db")

local util = require("util")

app:get("sse_thread_updates", "/thread-updates/:thread_id", function(self)
  do
    local thread = db.query("SELECT threads.id FROM threads WHERE threads.id = ?", self.params.thread_id)
    if #thread == 0 then
      return {status = 404, skip_render = true}
    end
  end
  
  local now = os.time()
  local stream = sse:new()
  
  local thread_id = self.params.thread_id
  local new_posts_query = "SELECT id FROM posts WHERE thread_id = ? AND posts.created_at > ? ORDER BY posts.created_at ASC LIMIT 1"
  
  while stream.active do
    stream:dispatch()
    local new_post = db.query(new_posts_query, thread_id, now)
    if #new_post > 0 then
      local url = util.get_post_url(self, new_post[1].id)
      stream:enqueue(url, "new_post_url")
    end
    
    ngx.sleep(5)
  end
  
  return {skip_render = true}
end)

return app