package api

import (
	"context"
	"fmt"
	"log"
	"net"

	"gitea.loveuer.com/loveuer/cluster/internal/middleware"
	"gitea.loveuer.com/loveuer/cluster/internal/model"
	"gitea.loveuer.com/loveuer/cluster/internal/module/k8s"
	"gitea.loveuer.com/loveuer/cluster/internal/module/registry"
	"gitea.loveuer.com/loveuer/cluster/pkg/store"
	"github.com/gofiber/fiber/v3"
	"gorm.io/gorm"
)

func Init(ctx context.Context, address string, db *gorm.DB, store store.Store) (func(context.Context) error, error) {
	var (
		err error
		ln  net.Listener
		cfg = fiber.Config{
			BodyLimit: 1024 * 1024 * 1024 * 10, // 10GB limit for large image layers
		}
		fn func(context.Context) error
	)

	app := fiber.New(cfg)

	app.Use(middleware.Logger())
	app.Use(middleware.Recovery())
	app.Use(middleware.CORS())

	// Ensure database migration for RegistryConfig
	// This is done here to ensure the table exists before config APIs are called
	if err := db.AutoMigrate(&model.RegistryConfig{}); err != nil {
		log.Printf("Warning: failed to migrate RegistryConfig: %v", err)
	}

	// Initialize k8s module
	if err := k8s.Init(ctx, db, store); err != nil {
		log.Printf("Warning: failed to initialize k8s module: %v", err)
	}

	// oci image apis
	{
		app.All("/v2/*", registry.Registry(ctx, db, store))
	}

	// registry image apis
	{
		registryAPI := app.Group("/api/v1/registry")
		registryAPI.Get("/image/list", registry.RegistryImageList(ctx, db, store))
		registryAPI.Get("/image/download/*", registry.RegistryImageDownload(ctx, db, store))
		registryAPI.Post("/image/upload", registry.RegistryImageUpload(ctx, db, store))
		registryAPI.Post("/image/fetch", registry.RegistryImageFetch(ctx, db, store))
		// registry config apis
		registryAPI.Get("/config", registry.RegistryConfigGet(ctx, db, store))
		registryAPI.Post("/config", registry.RegistryConfigSet(ctx, db, store))
	}

	// k8s cluster apis
	{
		k8sAPI := app.Group("/api/v1/k8s")
		// cluster config
		k8sAPI.Get("/config", k8s.ClusterConfigGet(ctx, db, store))
		k8sAPI.Post("/config", k8s.ClusterConfigSet(ctx, db, store))
		// resource operations
		k8sAPI.Post("/resource/apply", k8s.K8sResourceApply(ctx, db, store))
		k8sAPI.Get("/resource/get", k8s.K8sResourceFetch(ctx, db, store))
		k8sAPI.Post("/resource/update", k8s.K8sResourceUpdate(ctx, db, store))
		// resource list
		k8sAPI.Get("/namespace/list", k8s.K8sNamespaceList(ctx, db, store))
		k8sAPI.Get("/deployment/list", k8s.K8sDeploymentList(ctx, db, store))
		k8sAPI.Get("/statefulset/list", k8s.K8sStatefulSetList(ctx, db, store))
		k8sAPI.Get("/configmap/list", k8s.K8sConfigMapList(ctx, db, store))
		k8sAPI.Get("/pod/list", k8s.K8sPodList(ctx, db, store))
		k8sAPI.Get("/pod/logs", k8s.K8sPodLogs(ctx, db, store))
		k8sAPI.Delete("/pod/delete", k8s.K8sPodDelete(ctx, db, store))
		k8sAPI.Get("/pv/list", k8s.K8sPVList(ctx, db, store))
		k8sAPI.Get("/pvc/list", k8s.K8sPVCList(ctx, db, store))
		k8sAPI.Get("/service/list", k8s.K8sServiceList(ctx, db, store))
	}

	ln, err = net.Listen("tcp", address)
	if err != nil {
		return fn, fmt.Errorf("failed to listen on %s: %w", address, err)
	}

	go func() {
		if err = app.Listener(ln); err != nil {
			log.Fatalf("Fiber server failed on %s: %v", address, err)
		}
	}()

	fn = func(_ctx context.Context) error {
		log.Println("[W] service shutdown...")
		if err = app.ShutdownWithContext(_ctx); err != nil {
			return fmt.Errorf("[E] service shutdown failed, err = %w", err)
		}

		return nil
	}

	return fn, nil
}