package api

import (
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"testing"

	"git.misaka.ren/m1saka/dsh-web/internal/store"
)

func TestInstanceDeleteDataAndRetry(t *testing.T) {
	for _, blocked := range []bool{false, true} {
		t.Run(map[bool]string{false: "success", true: "retry"}[blocked], func(t *testing.T) {
			a, sid := runtimeTestAPI(t, func(w http.ResponseWriter, r *http.Request) {
				if r.Method == http.MethodDelete {
					w.WriteHeader(204)
				} else {
					w.WriteHeader(404)
				}
			})
			i := store.Instance{ID: "one", UID: "owner", ContainerID: "container"}
			if err := a.s.AddInstance(i); err != nil {
				t.Fatal(err)
			}
			write := func(rel string) {
				p := filepath.Join(a.root, rel)
				if err := os.MkdirAll(filepath.Dir(p), 0750); err != nil {
					t.Fatal(err)
				}
				if err := os.WriteFile(p, []byte("keep"), 0600); err != nil {
					t.Fatal(err)
				}
			}
			write("workspaces/owner/instances/one/home/data")
			write("workspaces/owner/instances/one/pre-restore-test/data")
			write("workspaces/owner/instances/two/home/data")
			write("backups/owner/one/archive.dshbak")
			write("backups/owner/two/archive.dshbak")
			outside := t.TempDir()
			sentinel := filepath.Join(outside, "sentinel")
			if err := os.WriteFile(sentinel, []byte("safe"), 0600); err != nil {
				t.Fatal(err)
			}
			if err := os.Symlink(outside, filepath.Join(a.root, "workspaces/owner/instances/one/home/link")); err != nil {
				t.Fatal(err)
			}
			backups := filepath.Join(a.root, "backups/owner")
			if blocked {
				if err := os.Rename(backups, backups+"-saved"); err != nil {
					t.Fatal(err)
				}
				if err := os.Symlink(backups+"-saved", backups); err != nil {
					t.Fatal(err)
				}
			}
			remove := func() *httptest.ResponseRecorder {
				w := httptest.NewRecorder()
				a.instance(w, runtimeRequest("DELETE", "/api/instances/one", "", sid))
				return w
			}
			w := remove()
			if blocked {
				if w.Code != 500 {
					t.Fatal(w.Code, w.Body.String())
				}
				current, err := a.s.GetInstance(i.ID)
				if err != nil || current.Status != "error" {
					t.Fatal(current, err)
				}
				if err := os.Remove(backups); err != nil {
					t.Fatal(err)
				}
				if err := os.Rename(backups+"-saved", backups); err != nil {
					t.Fatal(err)
				}
				w = remove()
			}
			if w.Code != 200 {
				t.Fatal(w.Code, w.Body.String())
			}
			for _, rel := range []string{"workspaces/owner/instances/one", "backups/owner/one"} {
				if _, err := os.Lstat(filepath.Join(a.root, rel)); !os.IsNotExist(err) {
					t.Fatal("data retained", rel, err)
				}
			}
			for _, p := range []string{sentinel, filepath.Join(a.root, "workspaces/owner/instances/two/home/data"), filepath.Join(a.root, "backups/owner/two/archive.dshbak")} {
				if _, err := os.Stat(p); err != nil {
					t.Fatal("unrelated data removed", err)
				}
			}
		})
	}
}

func TestUsageDoesNotCreateLegacyFiles(t *testing.T) {
	a, sid := runtimeTestAPI(t, func(w http.ResponseWriter, r *http.Request) { t.Fatal("unexpected Docker request") })
	w := httptest.NewRecorder()
	a.workspace(w, runtimeRequest("GET", "/api/ws/usage", "", sid))
	if w.Code != 200 {
		t.Fatal(w.Code, w.Body.String())
	}
	if _, err := os.Stat(filepath.Join(a.root, "workspaces/owner/files")); !os.IsNotExist(err) {
		t.Fatal("legacy directory created", err)
	}
	if _, err := a.openWorkspace(store.User{ID: "owner"}, ""); err == nil {
		t.Fatal("shared workspace accepted")
	}
}