// Package feedback is the golem15.feedback plugin: the embeddable feedback
// widget of SummerCMS applications. It ports the WinterCMS Golem15.Feedback
// plugin: the widget's public config and submit routes behind a widget key
// and an Origin allow-list, the per-user "hide the widget" preference, the
// settings screen, and the job that files every submission as a G15Office
// task with its screenshot.
package feedback

import (
	"context"
	"embed"
	"errors"
	"io/fs"
	"net/http"
	"time"

	"git.golem15.com/golem15/sm-feedback-plugin/console"
	"git.golem15.com/golem15/sm-feedback-plugin/models"
	"git.golem15.com/golem15/sm-feedback-plugin/updates"
	userclasses "git.golem15.com/golem15/sm-user-plugin/classes"
	"git.golem15.com/golem15/summercms/modules/backpack"
	"git.golem15.com/golem15/summercms/modules/bonfire"
	"git.golem15.com/golem15/summercms/modules/pact"
	"git.golem15.com/golem15/summercms/modules/party"
	"git.golem15.com/golem15/summercms/modules/surf"
	"github.com/go-gormigrate/gormigrate/v2"
	"gorm.io/gorm"
)

var (
	_ party.Plugin        = (*Plugin)(nil)
	_ pact.HasConfig      = (*Plugin)(nil)
	_ pact.HasLang        = (*Plugin)(nil)
	_ pact.HasMigrations  = (*Plugin)(nil)
	_ pact.HasModels      = (*Plugin)(nil)
	_ pact.HasRoutes      = (*Plugin)(nil)
	_ pact.HasCommands    = (*Plugin)(nil)
	_ surf.BucketProvider = (*Plugin)(nil)
)

//go:embed config
var configFS embed.FS

//go:embed lang
var langFS embed.FS

// Bucket names of the widget routes (routes.php RateLimiter::for).
const (
	BucketConfig = "feedback-config"
	BucketSubmit = "feedback-submit"
)

// Plugin is the golem15.feedback plugin.
type Plugin struct {
	app *backpack.App
}

// ID is the plugin ID, also its config and lang namespace.
func (p *Plugin) ID() string { return "golem15.feedback" }

// Requires is golem15.user: the preference route is JWT-guarded and the
// preference rides on the user payload.
func (p *Plugin) Requires() []string { return []string{"golem15.user"} }

// Register keeps the application.
func (p *Plugin) Register(app *backpack.App) error {
	p.app = app
	return nil
}

// Boot keeps the application and adds feedback_widget_hidden to every
// golem15.user payload (fetch, login, update...): the user's preference,
// false without a row. The user plugin itself is never changed.
func (p *Plugin) Boot(app *backpack.App) error {
	p.app = app
	if app != nil && app.Events != nil {
		app.Events.Listen[*userclasses.GetApiArrayEvent]("golem15.feedback", func(ctx context.Context, e *userclasses.GetApiArrayEvent) error {
			if e == nil || e.User == nil {
				return nil
			}
			gdb, ok := app.Lookup[*gorm.DB]()
			if !ok || gdb == nil {
				return errors.New("feedback: user payload listener has no database")
			}
			hidden, err := models.IsWidgetHidden(ctx, gdb, e.User.ID)
			if err != nil {
				return err
			}
			e.Collected()["feedback_widget_hidden"] = hidden
			return nil
		})
	}
	return nil
}

// ConfigFS ships config/config.yaml, merged under golem15.feedback.*.
func (p *Plugin) ConfigFS() fs.FS { return configFS }

// LangFS ships the golem15.feedback lang namespace (en, pl).
func (p *Plugin) LangFS() fs.FS { return langFS }

// Migrations creates the submissions, preferences and settings tables.
func (p *Plugin) Migrations() []*gormigrate.Migration { return updates.All() }

// Models is Submission, UserPreference and Settings.
func (p *Plugin) Models() []any { return models.All() }

// Commands is feedback:import-settings.
func (p *Plugin) Commands() []bonfire.Command {
	return []bonfire.Command{console.ImportSettings(p.app)}
}

// Buckets are the widget routes' limits by client IP (behind the trusted
// proxies): 60 config reads and 10 submissions a minute.
func (p *Plugin) Buckets() map[string]surf.Bucket {
	trusted := surf.TrustedProxies(nil)
	if p.app != nil {
		trusted = surf.TrustedProxies(p.app.Config)
	}
	byIP := func(r *http.Request) string { return surf.ClientIP(r, trusted) }
	return map[string]surf.Bucket{
		BucketConfig: {Max: 60, Decay: time.Minute, Key: byIP},
		BucketSubmit: {Max: 10, Decay: time.Minute, Key: byIP},
	}
}

func init() {
	party.Register(&Plugin{})
}