package sql

import (
	"database/sql"
	"encoding/json"

	"github.com/Masterminds/squirrel"
	"github.com/ansible-semaphore/semaphore/db"
)

func (d *SqlDb) CreateTemplate(template db.Template) (newTemplate db.Template, err error) {
	err = template.Validate()

	if err != nil {
		return
	}

	insertID, err := d.insert(
		"id",
		"insert into project__template (project_id, inventory_id, repository_id, environment_id, "+
			"name, playbook, arguments, allow_override_args_in_task, description, `type`, start_version,"+
			"build_template_id, view_id, autorun, survey_vars, suppress_success_alerts, app, git_branch)"+
			"values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
		template.ProjectID,
		template.InventoryID,
		template.RepositoryID,
		template.EnvironmentID,
		template.Name,
		template.Playbook,
		template.Arguments,
		template.AllowOverrideArgsInTask,
		template.Description,
		template.Type,
		template.StartVersion,
		template.BuildTemplateID,
		template.ViewID,
		template.Autorun,
		db.ObjectToJSON(template.SurveyVars),
		template.SuppressSuccessAlerts,
		template.App,
		template.GitBranch)

	if err != nil {
		return
	}

	err = d.UpdateTemplateVaults(template.ProjectID, insertID, template.Vaults)
	if err != nil {
		return
	}

	err = db.FillTemplate(d, &newTemplate)

	if err != nil {
		return
	}

	newTemplate = template
	newTemplate.ID = insertID

	return
}

func (d *SqlDb) UpdateTemplate(template db.Template) error {
	err := template.Validate()

	if err != nil {
		return err
	}

	_, err = d.exec("update project__template set "+
		"inventory_id=?, "+
		"repository_id=?, "+
		"environment_id=?, "+
		"name=?, "+
		"playbook=?, "+
		"arguments=?, "+
		"allow_override_args_in_task=?, "+
		"description=?, "+
		"`type`=?, "+
		"start_version=?,"+
		"build_template_id=?, "+
		"view_id=?, "+
		"autorun=?, "+
		"survey_vars=?, "+
		"suppress_success_alerts=?, "+
		"app=?, "+
		"`git_branch`=? "+
		"where id=? and project_id=?",
		template.InventoryID,
		template.RepositoryID,
		template.EnvironmentID,
		template.Name,
		template.Playbook,
		template.Arguments,
		template.AllowOverrideArgsInTask,
		template.Description,
		template.Type,
		template.StartVersion,
		template.BuildTemplateID,
		template.ViewID,
		template.Autorun,
		db.ObjectToJSON(template.SurveyVars),
		template.SuppressSuccessAlerts,
		template.App,
		template.GitBranch,
		template.ID,
		template.ProjectID,
	)
	if err != nil {
		return err
	}

	err = d.UpdateTemplateVaults(template.ProjectID, template.ID, template.Vaults)

	return err
}

func (d *SqlDb) GetTemplates(projectID int, filter db.TemplateFilter, params db.RetrieveQueryParams) (templates []db.Template, err error) {

	templates = []db.Template{}

	type templateWithLastTask struct {
		db.Template
		LastTaskID *int `db:"last_task_id"`
	}

	q := squirrel.Select("pt.id",
		"pt.project_id",
		"pt.inventory_id",
		"pt.repository_id",
		"pt.environment_id",
		"pt.name",
		"pt.description",
		"pt.playbook",
		"pt.arguments",
		"pt.allow_override_args_in_task",
		"pt.build_template_id",
		"pt.start_version",
		"pt.view_id",
		"pt.`app`",
		"pt.`git_branch`",
		"pt.survey_vars",
		"pt.start_version",
		"pt.`type`",
		"pt.`tasks`",
		"(SELECT `id` FROM `task` WHERE template_id = pt.id ORDER BY `id` DESC LIMIT 1) last_task_id").
		From("project__template pt")

	if filter.ViewID != nil {
		q = q.Where("pt.view_id=?", *filter.ViewID)
	}

	if filter.BuildTemplateID != nil {
		q = q.Where("pt.build_template_id=?", *filter.BuildTemplateID)
		if filter.AutorunOnly {
			q = q.Where("pt.autorun=true")
		}
	}

	order := "ASC"
	if params.SortInverted {
		order = "DESC"
	}

	switch params.SortBy {
	case "name", "playbook":
		q = q.Where("pt.project_id=?", projectID).
			OrderBy("pt." + params.SortBy + " " + order)
	case "inventory":
		q = q.LeftJoin("project__inventory pi ON (pt.inventory_id = pi.id)").
			Where("pt.project_id=?", projectID).
			OrderBy("pi.name " + order)
	case "environment":
		q = q.LeftJoin("project__environment pe ON (pt.environment_id = pe.id)").
			Where("pt.project_id=?", projectID).
			OrderBy("pe.name " + order)
	case "repository":
		q = q.LeftJoin("project__repository pr ON (pt.repository_id = pr.id)").
			Where("pt.project_id=?", projectID).
			OrderBy("pr.name " + order)
	default:
		q = q.Where("pt.project_id=?", projectID).
			OrderBy("pt.name " + order)
	}

	query, args, err := q.ToSql()

	if err != nil {
		return
	}

	var tpls []templateWithLastTask

	_, err = d.selectAll(&tpls, query, args...)

	if err != nil {
		return
	}

	taskIDs := make([]int, 0)

	for _, tpl := range tpls {
		if tpl.LastTaskID != nil {
			taskIDs = append(taskIDs, *tpl.LastTaskID)
		}
	}

	var tasks []db.TaskWithTpl
	err = d.getTasks(projectID, nil, taskIDs, db.RetrieveQueryParams{}, &tasks)

	if err != nil {
		return
	}

	for _, tpl := range tpls {
		template := tpl.Template

		if tpl.LastTaskID != nil {
			for _, tsk := range tasks {
				if tsk.ID == *tpl.LastTaskID {
					err = tsk.Fill(d)
					if err != nil {
						return
					}
					template.LastTask = &tsk
					break
				}
			}
		}

		if tpl.SurveyVarsJSON != nil {
			err = json.Unmarshal([]byte(*tpl.SurveyVarsJSON), &tpl.SurveyVars)
		}

		if err != nil {
			return
		}

		templates = append(templates, template)
	}

	return
}

func (d *SqlDb) GetTemplate(projectID int, templateID int) (template db.Template, err error) {
	err = d.selectOne(
		&template,
		"select * from project__template where project_id=? and id=?",
		projectID,
		templateID)

	if err == sql.ErrNoRows {
		err = db.ErrNotFound
	}

	if err != nil {
		return
	}

	err = db.FillTemplate(d, &template)
	return
}

func (d *SqlDb) DeleteTemplate(projectID int, templateID int) error {
	_, err := d.exec("delete from project__template where project_id=? and id=?", projectID, templateID)
	return err
}

func (d *SqlDb) GetTemplateRefs(projectID int, templateID int) (db.ObjectReferrers, error) {
	return d.getObjectRefs(projectID, db.TemplateProps, templateID)
}