package stacks

import (
	"strings"
	"testing"

	"gitea.dooplex.hu/admin/felhom-controller/internal/appbackup"
)

// R-203 Scenario A/B — what the DEPLOY sets as ${USERDATA_PATH}, table-driven over both drive kinds.
// This is the site the drill caught: on the system-data fallback the app bound a directory the
// off-site capture set never looked at, and the run still reported ok.
func TestWithPathVars_UserdataRootByDriveKind(t *testing.T) {
	const sys = "/mnt/sys_drive"
	const importRoot = "/mnt/sys_drive/felhom-data/userdata/import"
	cases := []struct{ name, hdd, want string }{
		// Scenario B — enrolled drives: BYTE-IDENTICAL to pre-R-203.
		{"enrolled usb", "/mnt/felhom-usb", "/mnt/felhom-usb/userdata"},
		{"enrolled hdd", "/mnt/felhom-drives/hdd_1", "/mnt/felhom-drives/hdd_1/userdata"},
		// Scenario A — the system-data fallback: the canonical namespace root, which is what the
		// skeleton builder creates and what the capture set resolves against.
		{"system drive", "/mnt/sys_drive", "/mnt/sys_drive/felhom-data/userdata"},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got := withPathVars([]string{"DOMAIN=x"}, tc.hdd, sys, importRoot)
			want := "USERDATA_PATH=" + tc.want
			for _, e := range got {
				if e == want {
					return
				}
			}
			var actual string
			for _, e := range got {
				if strings.HasPrefix(e, "USERDATA_PATH=") {
					actual = e
				}
			}
			t.Fatalf("USERDATA_PATH = %q, want %q — the app would bind a directory the backup does not capture", actual, want)
		})
	}
}

// The deploy-time bind and the backup-time capture root must be the SAME directory. Asserted against
// the resolver the off-site capture set actually uses, so the two cannot drift apart again silently.
func TestDeployBindMatchesCaptureRoot(t *testing.T) {
	const sys = "/mnt/sys_drive"
	for _, hdd := range []string{"/mnt/felhom-usb", "/mnt/felhom-drives/hdd_1", "/mnt/sys_drive"} {
		var bind string
		for _, e := range withPathVars(nil, hdd, sys, "") {
			if strings.HasPrefix(e, "USERDATA_PATH=") {
				bind = strings.TrimPrefix(e, "USERDATA_PATH=")
			}
		}
		captureRoot := appbackup.UserdataDir(appbackup.NamespaceRootFor(hdd, sys))
		if bind != captureRoot {
			t.Fatalf("drive %q: deploy binds %q, backup captures %q", hdd, bind, captureRoot)
		}
	}
}