package guards

import (
	"strings"
	"testing"
)

// cgoSQLiteDriverForbidden reports whether imp is a cgo SQLite driver.
// The stack is cgo-free by design (AGENTS.md / Deploys: "One binary,
// CGO_ENABLED=0, cgo-free SQLite. A cgo driver sneaking in is a bug."),
// so either of these landing in go.mod's dependency graph is a bug, not
// a style preference.
func cgoSQLiteDriverForbidden(imp string) bool {
	return strings.HasPrefix(imp, "github.com/glebarez/") || imp == "gorm.io/driver/sqlite"
}

// TestNoCgoSQLiteDriver walks every .go file's import block and fails
// on any import of glebarez/* or gorm.io/driver/sqlite.
func TestNoCgoSQLiteDriver(t *testing.T) {
	root := repoRoot(t)
	for _, path := range goFiles(t, root) {
		rel := relPath(t, root, path)
		for _, imp := range fileImports(t, path) {
			if cgoSQLiteDriverForbidden(imp) {
				t.Errorf("%s: imports %q, a cgo SQLite driver forbidden by AGENTS.md (Deploys: cgo-free SQLite)", rel, imp)
			}
		}
	}
}

// preMoveRastrillo is rastrillo's module path before it moved to
// amadan.net/rastrillo/rastrillo (v0.25.0). Nothing after v0.23.0 was
// released under it, so code importing it gets no rastrillo fix — which
// is how Sheets kept zooming iOS on every tap for a month after rastrillo
// fixed it (polish audit r3, item 1).
const preMoveRastrillo = "github.com/carlosframework/rastrillo"

// preMoveAllowed is the one file that may still import it, and why:
// rastrillo/native's server takes the old path's *sessions.Sessions.
// Delete the entry when native/server moves.
var preMoveAllowed = map[string]string{
	"internal/sheets/native.go": preMoveRastrillo + "/sessions",
}

// TestNoPreMoveRastrillo fails on any import of rastrillo's old module
// path outside preMoveAllowed.
func TestNoPreMoveRastrillo(t *testing.T) {
	root := repoRoot(t)
	for _, path := range goFiles(t, root) {
		rel := relPath(t, root, path)
		for _, imp := range fileImports(t, path) {
			if importUnder(imp, preMoveRastrillo) && preMoveAllowed[rel] != imp {
				t.Errorf("%s: imports %q, rastrillo's frozen pre-move path; use amadan.net/rastrillo/rastrillo", rel, imp)
			}
		}
	}
}