package db

import (
	"time"
)

type TaskStatus string

const (
	TaskWaitingStatus  TaskStatus = "waiting"
	TaskStartingStatus TaskStatus = "starting"
	TaskRunningStatus  TaskStatus = "running"
	TaskStoppingStatus TaskStatus = "stopping"
	TaskStoppedStatus  TaskStatus = "stopped"
	TaskSuccessStatus  TaskStatus = "success"
	TaskFailStatus     TaskStatus = "error"
)

func (s TaskStatus) IsFinished() bool {
	return s == TaskStoppedStatus || s == TaskSuccessStatus || s == TaskFailStatus
}

// Task is a model of a task which will be executed by the runner
type Task struct {
	ID         int `db:"id" json:"id"`
	TemplateID int `db:"template_id" json:"template_id" binding:"required"`
	ProjectID  int `db:"project_id" json:"project_id"`

	Status TaskStatus `db:"status" json:"status"`

	Debug  bool `db:"debug" json:"debug"`
	DryRun bool `db:"dry_run" json:"dry_run"`
	Diff   bool `db:"diff" json:"diff"`

	// override variables
	Playbook    string `db:"playbook" json:"playbook"`
	Environment string `db:"environment" json:"environment"`
	Limit       string `db:"hosts_limit" json:"limit"`

	UserID *int `db:"user_id" json:"user_id"`

	Created time.Time  `db:"created" json:"created"`
	Start   *time.Time `db:"start" json:"start"`
	End     *time.Time `db:"end" json:"end"`

	Message string `db:"message" json:"message"`

	// CommitMessage is a git commit hash of playbook repository which
	// was active when task was created.
	CommitHash *string `db:"commit_hash" json:"commit_hash"`
	// CommitMessage contains message retrieved from git repository after checkout to CommitHash.
	// It is readonly by API.
	CommitMessage string `db:"commit_message" json:"commit_message"`

	BuildTaskID *int `db:"build_task_id" json:"build_task_id"`

	// Version is a build version.
	// This field available only for Build tasks.
	Version *string `db:"version" json:"version"`

	Arguments *string `db:"arguments" json:"arguments"`
}

func (task *Task) GetIncomingVersion(d Store) *string {
	if task.BuildTaskID == nil {
		return nil
	}

	buildTask, err := d.GetTask(task.ProjectID, *task.BuildTaskID)

	if err != nil {
		return nil
	}

	tpl, err := d.GetTemplate(task.ProjectID, buildTask.TemplateID)
	if err != nil {
		return nil
	}

	if tpl.Type == TemplateBuild {
		return buildTask.Version
	}

	return buildTask.GetIncomingVersion(d)
}

func (task *Task) ValidateNewTask(template Template) error {
	switch template.Type {
	case TemplateBuild:
	case TemplateDeploy:
	case TemplateTask:
	}
	return nil
}

func (task *TaskWithTpl) Fill(d Store) error {
	if task.BuildTaskID != nil {
		build, err := d.GetTask(task.ProjectID, *task.BuildTaskID)
		if err == ErrNotFound {
			return nil
		}
		if err != nil {
			return err
		}
		task.BuildTask = &build
	}
	return nil
}

// TaskWithTpl is the task data with additional fields
type TaskWithTpl struct {
	Task
	TemplatePlaybook string       `db:"tpl_playbook" json:"tpl_playbook"`
	TemplateAlias    string       `db:"tpl_alias" json:"tpl_alias"`
	TemplateType     TemplateType `db:"tpl_type" json:"tpl_type"`
	UserName         *string      `db:"user_name" json:"user_name"`
	BuildTask        *Task        `db:"-" json:"build_task"`
}

// TaskOutput is the ansible log output from the task
type TaskOutput struct {
	TaskID int       `db:"task_id" json:"task_id"`
	Task   string    `db:"task" json:"task"`
	Time   time.Time `db:"time" json:"time"`
	Output string    `db:"output" json:"output"`
}