// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package model

import (
	"reflect"
	"strconv"
)

type FeatureFlags struct {
	// Exists only for unit and manual testing.
	// When set to a value, will be returned by the ping endpoint.
	TestFeature string
	// Exists only for testing bool functionality. Boolean feature flags interpret "on" or "true" as true and
	// all other values as false.
	TestBoolFeature bool

	// Toggle on and off scheduled jobs for cloud user limit emails see MM-29999
	CloudDelinquentEmailJobsEnabled bool

	// Toggle on and off support for Collapsed Threads
	CollapsedThreads bool

	// Enable the remote cluster service for shared channels.
	EnableRemoteClusterService bool

	// AppsEnabled toggle the Apps framework functionalities both in server and client side
	AppsEnabled bool

	// Feature flags to control plugin versions
	PluginIncidentManagement string `plugin_id:"com.mattermost.plugin-incident-management"`
	PluginApps               string `plugin_id:"com.mattermost.apps"`
	PluginFocalboard         string `plugin_id:"focalboard"`

	// Enable timed dnd support for user status
	TimedDND bool
}

func (f *FeatureFlags) SetDefaults() {
	f.TestFeature = "off"
	f.TestBoolFeature = false
	f.CloudDelinquentEmailJobsEnabled = false
	f.CollapsedThreads = true
	f.EnableRemoteClusterService = false
	f.AppsEnabled = false
	f.PluginIncidentManagement = "1.16.1"
	f.PluginApps = ""
	f.PluginFocalboard = ""
	f.TimedDND = false
}

func (f *FeatureFlags) Plugins() map[string]string {
	rFFVal := reflect.ValueOf(f).Elem()
	rFFType := reflect.TypeOf(f).Elem()

	pluginVersions := make(map[string]string)
	for i := 0; i < rFFVal.NumField(); i++ {
		rFieldVal := rFFVal.Field(i)
		rFieldType := rFFType.Field(i)

		pluginId, hasPluginId := rFieldType.Tag.Lookup("plugin_id")
		if !hasPluginId {
			continue
		}

		pluginVersions[pluginId] = rFieldVal.String()
	}

	return pluginVersions
}

// ToMap returns the feature flags as a map[string]string
// Supports boolean and string feature flags.
func (f *FeatureFlags) ToMap() map[string]string {
	refStructVal := reflect.ValueOf(*f)
	refStructType := reflect.TypeOf(*f)
	ret := make(map[string]string)
	for i := 0; i < refStructVal.NumField(); i++ {
		refFieldVal := refStructVal.Field(i)
		if !refFieldVal.IsValid() {
			continue
		}
		refFieldType := refStructType.Field(i)
		switch refFieldType.Type.Kind() {
		case reflect.Bool:
			ret[refFieldType.Name] = strconv.FormatBool(refFieldVal.Bool())
		default:
			ret[refFieldType.Name] = refFieldVal.String()
		}
	}

	return ret
}