package bm

import (
	"context"
	"embed"
	"io/fs"

	"git.golem15.com/golem15/summercms/modules/backpack"
	"git.golem15.com/golem15/summercms/modules/bonfire"
	"git.golem15.com/golem15/summercms/modules/lagoon"
	"git.golem15.com/golem15/summercms/modules/pact"
	"git.golem15.com/golem15/summercms/modules/party"
	"git.golem15.com/jakub/sm-bm-plugin/console"
	"git.golem15.com/jakub/sm-bm-plugin/controllers"
	"github.com/go-gormigrate/gormigrate/v2"
	"gorm.io/gorm"
)

var (
	_ pact.HasConfig           = (*Plugin)(nil)
	_ pact.HasLang             = (*Plugin)(nil)
	_ pact.HasMailTemplates    = (*Plugin)(nil)
	_ pact.HasModels           = (*Plugin)(nil)
	_ pact.HasMigrations       = (*Plugin)(nil)
	_ pact.HasCommands         = (*Plugin)(nil)
	_ pact.HasJobs             = (*Plugin)(nil)
	_ pact.HasAdminControllers = (*Plugin)(nil)
	_ pact.AdminAssets         = (*Plugin)(nil)
	_ pact.HasPermissions      = (*Plugin)(nil)
	_ pact.HasNavigation       = (*Plugin)(nil)
)

//go:embed config
var configFS embed.FS

//go:embed lang
var langFS embed.FS

//go:embed views/mail
var mailFS embed.FS

//go:embed controllers/*/*.yaml models/*/*.yaml
var adminFS embed.FS

// Plugin is the jz.bm plugin: the study dashboard backend of the BM
// (Bezpieczeństwo międzynarodowe) master's programme.
type Plugin struct {
	app *backpack.App
	// publicFS is the tree of the student app. Nil means the embedded
	// public/ directory; tests plant their own.
	publicFS fs.FS
}

func (p *Plugin) ID() string { return "jz.bm" }

// Requires golem15.user: its users table holds the students, and its
// jwt.auth and user.api_token middleware guard the APIs.
func (p *Plugin) Requires() []string { return []string{"golem15.user"} }

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

// Boot keeps the application, so route handlers and commands can reach its
// services, such as the database, when they run. The management API uses the
// shared user.api_token middleware owned by golem15.user.
func (p *Plugin) Boot(app *backpack.App) error {
	p.app = app
	return nil
}

func (p *Plugin) ConfigFS() fs.FS { return configFS }
func (p *Plugin) LangFS() fs.FS   { return langFS }

func (p *Plugin) MailTemplatesFS() fs.FS         { return mailFS }
func (p *Plugin) MailTemplates() []string        { return nil }
func (p *Plugin) MailLayouts() map[string]string { return nil }

func (p *Plugin) Models() []any                       { return generatedModels() }
func (p *Plugin) Migrations() []*gormigrate.Migration { return generatedMigrations() }
func (p *Plugin) Jobs() []pact.Job                    { return generatedJobs() }
func (p *Plugin) AdminControllers() []pact.AdminController {
	return generatedAdminControllers()
}

// Commands returns the generated commands plus bm:seed. API tokens are
// managed application-wide by golem15.user.
func (p *Plugin) Commands() []bonfire.Command {
	return append(generatedCommands(), console.SeedCommand(p.withDB))
}

// AdminFS is the admin YAML the controllers read.
func (p *Plugin) AdminFS() fs.FS { return adminFS }

// Permissions replaces registerPermissions().
func (p *Plugin) Permissions() []pact.Permission {
	tab := "jz.bm::lang.plugin.name"
	return []pact.Permission{
		{Code: controllers.PermCourses, Tab: tab, Label: "jz.bm::lang.permissions.access_courses"},
		{Code: controllers.PermSchedule, Tab: tab, Label: "jz.bm::lang.permissions.access_schedule"},
		{Code: controllers.PermMaterials, Tab: tab, Label: "jz.bm::lang.permissions.access_materials"},
	}
}

// Navigation replaces registerNavigation(): one "Studia BM" group with a
// side item per screen.
func (p *Plugin) Navigation() []pact.NavigationItem {
	return []pact.NavigationItem{{
		Code:        "bm",
		Label:       "jz.bm::lang.plugin.name",
		Icon:        "icon-graduation-cap",
		Permissions: []string{controllers.PermCourses, controllers.PermSchedule, controllers.PermMaterials},
		Order:       300,
		Controller:  "jz.bm.courses",
		SideMenu: []pact.NavigationItem{
			{Code: "courses", Label: "jz.bm::lang.navigation.courses", Icon: "icon-book", Permissions: []string{controllers.PermCourses}, Controller: "jz.bm.courses"},
			{Code: "readings", Label: "jz.bm::lang.navigation.readings", Icon: "icon-bookmark", Permissions: []string{controllers.PermCourses}, Controller: "jz.bm.readings"},
			{Code: "meetings", Label: "jz.bm::lang.navigation.meetings", Icon: "icon-calendar", Permissions: []string{controllers.PermSchedule}, Controller: "jz.bm.meetings"},
			{Code: "sessions", Label: "jz.bm::lang.navigation.sessions", Icon: "icon-clock-o", Permissions: []string{controllers.PermSchedule}, Controller: "jz.bm.class_sessions"},
			{Code: "deadlines", Label: "jz.bm::lang.navigation.deadlines", Icon: "icon-flag", Permissions: []string{controllers.PermSchedule}, Controller: "jz.bm.deadlines"},
			{Code: "materials", Label: "jz.bm::lang.navigation.materials", Icon: "icon-file-text-o", Permissions: []string{controllers.PermMaterials}, Controller: "jz.bm.materials"},
			{Code: "tags", Label: "jz.bm::lang.navigation.tags", Icon: "icon-tags", Permissions: []string{controllers.PermMaterials}, Controller: "jz.bm.tags"},
		},
	}}
}

// withDB runs fn with the application's database: the one the serve command
// published, or, when a console command runs, one opened from the config for
// the duration of fn.
func (p *Plugin) withDB(ctx context.Context, fn func(*gorm.DB) error) error {
	if gdb, ok := p.app.Lookup[*gorm.DB](); ok && gdb != nil {
		return fn(gdb)
	}
	sqlDB, gdb, err := lagoon.OpenFromApp(ctx, p.app)
	if err != nil {
		return err
	}
	defer sqlDB.Close()
	return fn(gdb)
}

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