package gdb

import (
	"github.com/shylinux/icebergs"
	"github.com/shylinux/toolkits"

	"os"
	"os/signal"
	"syscall"
	"time"
)

type Frame struct {
	s chan os.Signal
	t <-chan time.Time
	d chan []string
}

func (f *Frame) Spawn(m *ice.Message, c *ice.Context, arg ...string) ice.Server {
	return &Frame{}
}
func (f *Frame) Begin(m *ice.Message, arg ...string) ice.Server {
	return f
}
func (f *Frame) Start(m *ice.Message, arg ...string) bool {
	for {
		select {
		case s, ok := <-f.s:
			if !ok {
				return true
			}
			m.Log(ice.LOG_INFO, "signal %v", s)
			m.Cmd(m.Confv(ice.GDB_SIGNAL, kit.Keys(ice.MDB_HASH, s)))
			m.Grow(ice.GDB_SIGNAL, nil, map[string]interface{}{
				"create_time": m.Time(), "signal": kit.Format(s),
				"cmd": m.Confv(ice.GDB_SIGNAL, kit.Format(s)),
			})

		case t, ok := <-f.t:
			if !ok {
				return true
			}
			break
			stamp := int(t.Unix())
			m.Confm(ice.GDB_TIMER, ice.MDB_HASH, func(key string, value map[string]interface{}) {
				if kit.Int(value["next"]) <= stamp {
					m.Log(ice.LOG_INFO, "timer %v %v", key, value["next"])
					value["next"] = stamp + int(kit.Duration(value["interval"]))/int(time.Second)
					m.Cmd(value["cmd"])
					m.Grow(ice.GDB_TIMER, nil, map[string]interface{}{
						"create_time": kit.Format(t), "interval": value["interval"],
						"cmd": value["cmd"], "key": key,
					})
				}
			})

		case d, ok := <-f.d:
			if !ok {
				return true
			}
			m.Log(ice.LOG_INFO, "event %v", d)
			m.Confm(ice.GDB_EVENT, kit.Keys(ice.MDB_HASH, d[0], d[1], ice.MDB_HASH), func(key string, value map[string]interface{}) {
				m.Log(ice.LOG_INFO, "event %v %v", key, value)
				m.Cmd(value["cmd"], d[2:])
			})
		}
	}
	return true
}
func (f *Frame) Close(m *ice.Message, arg ...string) bool {
	return true
}

var Index = &ice.Context{Name: "gdb", Help: "事件模块",
	Caches: map[string]*ice.Cache{},
	Configs: map[string]*ice.Config{
		ice.GDB_SIGNAL: {Name: "signal", Help: "信号器", Value: map[string]interface{}{
			ice.MDB_META: map[string]interface{}{
				"pid": "var/run/shy.pid",
			},
			ice.MDB_HASH: map[string]interface{}{
				"2":  []interface{}{"exit"},
				"3":  []interface{}{"exit", "1"},
				"15": []interface{}{"exit", "1"},
				"30": []interface{}{"exit"},
				"31": []interface{}{"exit", "1"},
				"28": "WINCH",
			},
			ice.MDB_LIST: map[string]interface{}{},
		}},
		ice.GDB_TIMER: {Name: "timer", Help: "定时器", Value: map[string]interface{}{
			ice.MDB_META: map[string]interface{}{
				"tick": "100ms",
			},
			ice.MDB_HASH: map[string]interface{}{},
			ice.MDB_LIST: map[string]interface{}{},
		}},
		ice.GDB_EVENT: {Name: "event", Help: "触发器", Value: map[string]interface{}{
			ice.MDB_META: map[string]interface{}{},
			ice.MDB_HASH: map[string]interface{}{},
			ice.MDB_LIST: map[string]interface{}{},
		}},
	},
	Commands: map[string]*ice.Command{
		ice.ICE_INIT: {Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			if f, p, e := kit.Create(m.Conf(ice.GDB_SIGNAL, kit.Keys(ice.MDB_META, "pid"))); m.Assert(e) {
				defer f.Close()
				f.WriteString(kit.Format(os.Getpid()))
				m.Log("info", "pid %d: %s", os.Getpid(), p)
			}

			if f, ok := m.Target().Server().(*Frame); ok {
				f.s = make(chan os.Signal, ice.ICE_CHAN)
				m.Confm(ice.GDB_SIGNAL, ice.MDB_HASH, func(sig string, action string) {
					m.Log(ice.GDB_SIGNAL, "add %s: %s", sig, action)
					signal.Notify(f.s, syscall.Signal(kit.Int(sig)))
				})

				f.t = time.Tick(kit.Duration(m.Cap(ice.CTX_STREAM, m.Conf(ice.GDB_TIMER, kit.Keys(ice.MDB_META, "tick")))))
				f.d = make(chan []string, ice.ICE_CHAN)
			}
		}},
		ice.ICE_EXIT: {Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			if f, ok := m.Target().Server().(*Frame); ok {
				close(f.s)
				close(f.d)
			}
		}},
		ice.GDB_SIGNAL: {Name: "signal", Help: "信号器", Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			m.Conf(ice.GDB_SIGNAL, kit.Keys(ice.MDB_META, arg[0]), arg[1:])
		}},
		ice.GDB_TIMER: {Name: "timer", Help: "定时器", Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			switch arg[0] {
			case "start":
				m.Rich(ice.GDB_TIMER, nil, map[string]interface{}{
					"next":     time.Now().Add(kit.Duration(arg[1])).Unix(),
					"interval": arg[1], "cmd": arg[2:],
				})
			}
		}},
		ice.GDB_EVENT: {Name: "event", Help: "触发器", Hand: func(m *ice.Message, c *ice.Context, cmd string, arg ...string) {
			switch arg[0] {
			case "listen":
				m.Rich(ice.GDB_EVENT, kit.Keys(ice.MDB_HASH, arg[1], arg[2]), map[string]interface{}{
					"create_time": m.Time(), "cmd": arg[3:],
				})
			case "action":
				if f, ok := m.Target().Server().(*Frame); ok {
					f.d <- arg[1:]
				}
			}
		}},
	},
}

func init() { ice.Index.Register(Index, &Frame{}) }