class TplinkSmarthomeApi

# File lib/tplink_smarthome_api.rb, line 39
def self.dependencies_met?
  self.smarthome_cli_available?
end

# File lib/tplink_smarthome_api.rb, line 7
def initialize(ip_address, verbose: false)
  raise RuntimeError unless self.class.dependencies_met?
  @ip_address = ip_address
  @verbose = verbose
end

# File lib/tplink_smarthome_api.rb, line 50
def self.smarthome_cli_available?
  `which tplink-smarthome-api`
  return true if $?.exitstatus == 0

  puts "[#{Time.now}] tplink-smarthome-api could not be found."
  puts "[#{Time.now}] To install it, run: `npm install -g tplink-smarthome-api`"
  false
end

# File lib/tplink_smarthome_api.rb, line 18
def power_off(delay: 0)
  switch_power false, delay: delay
  self
end

# File lib/tplink_smarthome_api.rb, line 13
def power_on(delay: 0)
  switch_power true, delay: delay
  self
end

# File lib/tplink_smarthome_api.rb, line 33
def reboot(delay: 1)
  payload = { system: {
              reboot: { delay: delay } } }.to_json
  send_command payload
end

# File lib/tplink_smarthome_api.rb, line 23
def switch_power(value, delay: 0)
  sleep(delay)
  log("[#{Time.now}] Switching power #{value ? 'on' : 'off'} for #{ip_address}...")
  payload = { system: {
              set_relay_state: { state: value ? 1 : 0 }
            } }.to_json
  send_command payload
  self
end

# File lib/tplink_smarthome_api.rb, line 59
def log(payload)
  puts payload if verbose
end

# File lib/tplink_smarthome_api.rb, line 45
def send_command(payload)
  `tplink-smarthome-api sendCommand #{ip_address} '#{payload}'`
  self
end