// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package internal contains data used through x/pkgsite.
package internal

const (
	ExperimentDeprecatedDoc             = "deprecated-doc"
	ExperimentEnableStdFrontendFetch    = "enable-std-frontend-fetch"
	ExperimentNewUnitLayout             = "new-unit-layout"
	ExperimentSearchGrouping            = "search-grouping"
	ExperimentSearchIncrementally       = "search-incrementally"
	ExperimentSkipInsertSymbols         = "skip-insert-symbols"
	ExperimentStyleGuide                = "styleguide"
	ExperimentSymbolHistoryMainPage     = "symbol-history-main-page"
	ExperimentSymbolHistoryVersionsPage = "symbol-history-versions-page"
	ExperimentSymbolSearch              = "symbol-search"
)

// Experiments represents all of the active experiments in the codebase and
// a description of each experiment.
var Experiments = map[string]string{
	ExperimentDeprecatedDoc:             "Treat deprecated symbols specially in documentation.",
	ExperimentEnableStdFrontendFetch:    "Enable frontend fetching for module std.",
	ExperimentNewUnitLayout:             "Enable the new layout on the unit page.",
	ExperimentSearchGrouping:            "Group search results.",
	ExperimentSearchIncrementally:       "Use incremental query for search results.",
	ExperimentSkipInsertSymbols:         "Don't insert data into symbols tables.",
	ExperimentStyleGuide:                "Enable the styleguide.",
	ExperimentSymbolHistoryMainPage:     "Show package API history on the main unit page.",
	ExperimentSymbolHistoryVersionsPage: "Show package API history on the versions page.",
	ExperimentSymbolSearch:              "Enable searching for symbols.",
}

// Experiment holds data associated with an experimental feature for frontend
// or worker.
type Experiment struct {
	// This struct is used to decode dynamic config (see
	// internal/config/dynconfig). Make sure that changes to this struct are
	// coordinated with the deployment of config files.

	// Name is the name of the feature.
	Name string

	// Rollout is the percentage of requests enrolled in the experiment.
	Rollout uint

	// Description provides a description of the experiment.
	Description string
}