package tasks

import (
	"sync"
	"time"

	. "git.andr3h3nriqu3s.com/andr3/fyp/logic/db_types"
	. "git.andr3h3nriqu3s.com/andr3/fyp/logic/models/train"
	. "git.andr3h3nriqu3s.com/andr3/fyp/logic/tasks/utils"
	. "git.andr3h3nriqu3s.com/andr3/fyp/logic/utils"
)

func verifyRunner(c *Context, dat *JustId) (runner *Runner, e *Error) {
	runner, err := GetRunner(c, dat.Id)
	if err == NotFoundError {
		e = c.JsonBadRequest("Could not find runner, please register runner first")
		return
	} else if err != nil {
		e = c.E500M("Failed to get information about the runner", err)
		return
	}

	if runner.Token != *c.Token {
		return nil, c.SendJSONStatus(401, "Only runners can use this funcion")
	}

	return
}

type VerifyTask struct {
	Id     string `json:"id" validate:"required"`
	TaskId string `json:"taskId" validate:"required"`
}

func verifyTask(x *Handle, c *Context, dat *VerifyTask) (task *Task, error *Error) {
	mutex := x.DataMap["runners_mutex"].(*sync.Mutex)
	mutex.Lock()
	defer mutex.Unlock()

	var runners map[string]interface{} = x.DataMap["runners"].(map[string]interface{})
	if runners[dat.Id] == nil {
		return nil, c.JsonBadRequest("Runner not active")
	}

	var runner_data map[string]interface{} = runners[dat.Id].(map[string]interface{})

	if runner_data["task"] == nil {
		return nil, c.SendJSONStatus(404, "No active task")
	}

	return runner_data["task"].(*Task), nil
}

func handleRemoteRunner(x *Handle) {

	type RegisterRunner struct {
		Token string     `json:"token" validate:"required"`
		Type  RunnerType `json:"type" validate:"required"`
	}
	PostAuthJson(x, "/tasks/runner/register", User_Normal, func(c *Context, dat *RegisterRunner) *Error {
		if *c.Token != dat.Token {
			// TODO do admin
			return c.E500M("Please make sure that the token is the same that is being registered", nil)
		}

		c.Logger.Info("test", "dat", dat)

		var runner Runner
		err := GetDBOnce(c, &runner, "remote_runner as ru where token=$1", dat.Token)
		if err != NotFoundError && err != nil {
			return c.E500M("Failed to get information remote runners", err)
		}
		if err != NotFoundError {
			return c.JsonBadRequest("Token is already registered by a runner")
		}

		// TODO get id from token passed by when doing admin
		var userId = c.User.Id

		var new_runner = struct {
			Type   RunnerType
			UserId string `db:"user_id"`
			Token  string
		}{
			Type:   dat.Type,
			Token:  dat.Token,
			UserId: userId,
		}

		id, err := InsertReturnId(c, &new_runner, "remote_runner", "id")
		if err != nil {
			return c.E500M("Failed to create remote runner", err)
		}

		return c.SendJSON(struct {
			Id string `json:"id"`
		}{
			Id: id,
		})
	})

	// TODO remove runner

	PostAuthJson(x, "/tasks/runner/init", User_Normal, func(c *Context, dat *JustId) *Error {
		runner, error := verifyRunner(c, dat)
		if error != nil {
			return error
		}

		mutex := x.DataMap["runners_mutex"].(*sync.Mutex)
		mutex.Lock()
		defer mutex.Unlock()

		var runners map[string]interface{} = x.DataMap["runners"].(map[string]interface{})
		if runners[dat.Id] != nil {
			c.Logger.Info("Logger trying to register but already registerd")
			c.ShowMessage = false
			return c.SendJSON("Ok")
		}

		var new_runner = map[string]interface{}{}
		new_runner["last_time_check"] = time.Now()
		new_runner["runner_info"] = runner

		runners[dat.Id] = new_runner

		x.DataMap["runners"] = runners

		return c.SendJSON("Ok")
	})

	PostAuthJson(x, "/tasks/runner/active", User_Normal, func(c *Context, dat *JustId) *Error {
		_, error := verifyRunner(c, dat)
		if error != nil {
			return error
		}

		mutex := x.DataMap["runners_mutex"].(*sync.Mutex)
		mutex.Lock()
		defer mutex.Unlock()

		var runners map[string]interface{} = x.DataMap["runners"].(map[string]interface{})
		if runners[dat.Id] == nil {
			return c.JsonBadRequest("Runner not active")
		}

		var runner_data map[string]interface{} = runners[dat.Id].(map[string]interface{})

		if runner_data["task"] == nil {
			c.ShowMessage = false
			return c.SendJSONStatus(404, "No active task")
		}

		c.ShowMessage = false
		// This should be a task obj
		return c.SendJSON(runner_data["task"])
	})

	PostAuthJson(x, "/tasks/runner/ready", User_Normal, func(c *Context, dat *VerifyTask) *Error {
		_, error := verifyRunner(c, &JustId{Id: dat.Id})
		if error != nil {
			return error
		}

		task, error := verifyTask(x, c, dat)
		if error != nil {
			return error
		}

		err := task.UpdateStatus(c, TASK_RUNNING, "Task Running on Runner")
		if err != nil {
			return c.E500M("Failed to set task status", err)
		}

		return c.SendJSON("Ok")
	})

	type TaskFail struct {
		Id     string `json:"id" validate:"required"`
		TaskId string `json:"taskId" validate:"required"`
		Reason string `json:"reason" validate:"required"`
	}
	PostAuthJson(x, "/tasks/runner/fail", User_Normal, func(c *Context, dat *TaskFail) *Error {
		_, error := verifyRunner(c, &JustId{Id: dat.Id})
		if error != nil {
			return error
		}

		task, error := verifyTask(x, c, &VerifyTask{Id: dat.Id, TaskId: dat.TaskId})
		if error != nil {
			return error
		}

		err := task.UpdateStatus(c, TASK_FAILED_RUNNING, dat.Reason)
		if err != nil {
			return c.E500M("Failed to set task status", err)
		}

		// Do extra clean up on tasks
		switch task.TaskType {
		case int(TASK_TYPE_TRAINING):
			CleanUpFailed(c, task)
		default:
			panic("Do not know how to handle this")
		}

		mutex := x.DataMap["runners_mutex"].(*sync.Mutex)
		mutex.Lock()
		defer mutex.Unlock()

		var runners map[string]interface{} = x.DataMap["runners"].(map[string]interface{})
		var runner_data map[string]interface{} = runners[dat.Id].(map[string]interface{})
		runner_data["task"] = nil

		runners[dat.Id] = runner_data
		x.DataMap["runners"] = runners

		return c.SendJSON("Ok")
	})

	PostAuthJson(x, "/tasks/runner/train/defs", User_Normal, func(c *Context, dat *VerifyTask) *Error {
		_, error := verifyRunner(c, &JustId{Id: dat.Id})
		if error != nil {
			return error
		}

		task, error := verifyTask(x, c, dat)
		if error != nil {
			return error
		}

		if task.TaskType != int(TASK_TYPE_TRAINING) {
			c.Logger.Error("Task not is not the right type to get the definitions", "task type", task.TaskType)
			return c.JsonBadRequest("Task is not the right type go get the definitions")
		}

		model, err := GetBaseModel(c, *task.ModelId)
		if err != nil {
			return c.E500M("Failed to get model information", err)
		}

		defs, err := model.GetDefinitions(c, "and md.status=$2", DEFINITION_STATUS_INIT)
		if err != nil {
			return c.E500M("Failed to get the model definitions", err)
		}

		return c.SendJSON(defs)
	})

	PostAuthJson(x, "/tasks/runner/train/classes", User_Normal, func(c *Context, dat *VerifyTask) *Error {
		_, error := verifyRunner(c, &JustId{Id: dat.Id})
		if error != nil {
			return error
		}

		task, error := verifyTask(x, c, dat)
		if error != nil {
			return error
		}

		if task.TaskType != int(TASK_TYPE_TRAINING) {
			c.Logger.Error("Task not is not the right type to get the definitions", "task type", task.TaskType)
			return c.JsonBadRequest("Task is not the right type go get the definitions")
		}

		model, err := GetBaseModel(c, *task.ModelId)
		if err != nil {
			return c.E500M("Failed to get model information", err)
		}

		classes, err := model.GetClasses(c, "and status=$2 order by mc.class_order asc", CLASS_STATUS_TO_TRAIN)
		if err != nil {
			return c.E500M("Failed to get the model classes", err)
		}

		return c.SendJSON(classes)
	})

	type RunnerTrainDefStatus struct {
		Id     string           `json:"id" validate:"required"`
		TaskId string           `json:"taskId" validate:"required"`
		DefId  string           `json:"defId" validate:"required"`
		Status DefinitionStatus `json:"status" validate:"required"`
	}
	PostAuthJson(x, "/tasks/runner/train/def/status", User_Normal, func(c *Context, dat *RunnerTrainDefStatus) *Error {
		_, error := verifyRunner(c, &JustId{Id: dat.Id})
		if error != nil {
			return error
		}

		task, error := verifyTask(x, c, &VerifyTask{Id: dat.Id, TaskId: dat.TaskId})
		if error != nil {
			return error
		}

		if task.TaskType != int(TASK_TYPE_TRAINING) {
			c.Logger.Error("Task not is not the right type to get the definitions", "task type", task.TaskType)
			return c.JsonBadRequest("Task is not the right type go get the definitions")
		}

		def, err := GetDefinition(c, dat.DefId)
		if err != nil {
			return c.E500M("Failed to get definition information", err)
		}

		err = def.UpdateStatus(c, dat.Status)
		if err != nil {
			return c.E500M("Failed to update model status", err)
		}

		return c.SendJSON("Ok")
	})

	type RunnerTrainDefLayers struct {
		Id     string `json:"id" validate:"required"`
		TaskId string `json:"taskId" validate:"required"`
		DefId  string `json:"defId" validate:"required"`
	}
	PostAuthJson(x, "/tasks/runner/train/def/layers", User_Normal, func(c *Context, dat *RunnerTrainDefLayers) *Error {
		_, error := verifyRunner(c, &JustId{Id: dat.Id})
		if error != nil {
			return error
		}

		task, error := verifyTask(x, c, &VerifyTask{Id: dat.Id, TaskId: dat.TaskId})
		if error != nil {
			return error
		}

		if task.TaskType != int(TASK_TYPE_TRAINING) {
			c.Logger.Error("Task not is not the right type to get the definitions", "task type", task.TaskType)
			return c.JsonBadRequest("Task is not the right type go get the definitions")
		}

		def, err := GetDefinition(c, dat.DefId)
		if err != nil {
			return c.E500M("Failed to get definition information", err)
		}

		layers, err := def.GetLayers(c, " order by layer_order asc")
		if err != nil {
			return c.E500M("Failed to get layers", err)
		}

		return c.SendJSON(layers)
	})

	PostAuthJson(x, "/tasks/runner/train/datapoints", User_Normal, func(c *Context, dat *VerifyTask) *Error {
		_, error := verifyRunner(c, &JustId{Id: dat.Id})
		if error != nil {
			return error
		}

		task, error := verifyTask(x, c, dat)
		if error != nil {
			return error
		}

		if task.TaskType != int(TASK_TYPE_TRAINING) {
			c.Logger.Error("Task not is not the right type to get the definitions", "task type", task.TaskType)
			return c.JsonBadRequest("Task is not the right type go get the definitions")
		}

		model, err := GetBaseModel(c, *task.ModelId)
		if err != nil {
			return c.E500M("Failed to get model information", err)
		}

		training_points, err := model.DataPoints(c, DATA_POINT_MODE_TRAINING)
		if err != nil {
			return c.E500M("Failed to get the model classes", err)
		}
		testing_points, err := model.DataPoints(c, DATA_POINT_MODE_TRAINING)
		if err != nil {
			return c.E500M("Failed to get the model classes", err)
		}

		return c.SendJSON(struct {
			Testing  []DataPoint `json:"testing"`
			Training []DataPoint `json:"training"`
		}{
			Testing:  testing_points,
			Training: training_points,
		})
	})
}