package shared

import (
	"strings"
	"testing"

	"git.entityseven.com/rilaxik/pllist/internal/domain"
)

func TestCallbackID(t *testing.T) {
	tests := []struct {
		name    string
		data    string
		action  CallbackAction
		want    int64
		wantErr bool
	}{
		{name: "valid", data: "v1:open_list:42", action: ActionListOpen, want: 42},
		{name: "wrong action", data: "v1:rename_list:42", action: ActionListOpen, wantErr: true},
		{name: "wrong version", data: "v2:open_list:42", action: ActionListOpen, wantErr: true},
		{name: "unversioned", data: "open_list:42", action: ActionListOpen, wantErr: true},
		{name: "not a number", data: "v1:open_list:abc", action: ActionListOpen, wantErr: true},
		{name: "zero", data: "v1:open_list:0", action: ActionListOpen, wantErr: true},
		{name: "negative", data: "v1:open_list:-1", action: ActionListOpen, wantErr: true},
		{name: "missing id", data: "v1:open_list", action: ActionListOpen, wantErr: true},
		{name: "extra arg", data: "v1:open_list:42:1", action: ActionListOpen, wantErr: true},
		{name: "too long", data: "v1:open_list:" + strings.Repeat("1", MaxCallbackDataLength), action: ActionListOpen, wantErr: true},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := CallbackID(tt.data, tt.action)
			if (err != nil) != tt.wantErr {
				t.Fatalf("CallbackID() error = %v, wantErr %v", err, tt.wantErr)
			}
			if got != tt.want {
				t.Fatalf("CallbackID() = %d, want %d", got, tt.want)
			}
		})
	}
}

func TestListDataRoundTrip(t *testing.T) {
	tests := []struct {
		name   string
		data   string
		action CallbackAction
	}{
		{name: "open", data: ListData(42), action: ActionListOpen},
		{name: "rename", data: RenameListData(42), action: ActionListRename},
		{name: "delete", data: DeleteListData(42), action: ActionListDelete},
		{name: "delete yes", data: DeleteListYesData(42), action: ActionListDeleteYes},
		{name: "shares", data: SharesData(42), action: ActionShareManage},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if !strings.HasPrefix(tt.data, "v1:") {
				t.Fatalf("callback data is not versioned: %q", tt.data)
			}
			id, err := CallbackID(tt.data, tt.action)
			if err != nil {
				t.Fatalf("CallbackID(%q) error = %v", tt.data, err)
			}
			if id != 42 {
				t.Fatalf("CallbackID(%q) = %d, want 42", tt.data, id)
			}
		})
	}
}

func TestPageCallbackRoundTrip(t *testing.T) {
	data := PageData(42, 3)
	listID, page, err := ParsePage(data)
	if err != nil {
		t.Fatalf("ParsePage(%q) error = %v", data, err)
	}
	if listID != 42 || page != 3 {
		t.Fatalf("ParsePage(%q) = %d, %d", data, listID, page)
	}
}

func TestPageCallbackRejectsBadData(t *testing.T) {
	for _, data := range []string{
		"v1:page",
		"v1:page:42",
		"v1:page:0:1",
		"v1:page:42:0",
		"v1:page:42:abc",
		"v1:page:42:1:extra",
		"page:42:1",
	} {
		if _, _, err := ParsePage(data); err == nil {
			t.Fatalf("ParsePage(%q) accepted invalid data", data)
		}
	}
}

func TestShareCallbackRoundTrips(t *testing.T) {
	for _, pending := range []bool{false, true} {
		ref := ShareRef{ListID: 42, ShareID: 7, Pending: pending}
		for _, tt := range []struct {
			name   string
			data   string
			action CallbackAction
		}{
			{name: "view", data: ShareViewData(ref), action: ActionShareView},
			{name: "revoke", data: ShareRevokeData(ref), action: ActionShareRevoke},
			{name: "revoke yes", data: ShareRevokeYesData(ref), action: ActionShareRevokeYes},
		} {
			got, err := ParseShareRef(tt.data, tt.action)
			if err != nil {
				t.Fatalf("%s ParseShareRef(%q) error = %v", tt.name, tt.data, err)
			}
			if got != ref {
				t.Fatalf("%s ParseShareRef(%q) = %+v, want %+v", tt.name, tt.data, got, ref)
			}
		}

		got, role, err := ParseShareSet(ShareSetData(ref, domain.RoleReader))
		if err != nil || role != domain.RoleReader || got != ref {
			t.Fatalf("ParseShareSet() = %+v, %q, %v", got, role, err)
		}
	}

	listID, role, err := ParseShareRole(ShareRoleData(42, domain.RoleEditor))
	if err != nil || listID != 42 || role != domain.RoleEditor {
		t.Fatalf("ParseShareRole() = %d, %q, %v", listID, role, err)
	}
}

func TestShareCallbackRejectsBadData(t *testing.T) {
	for _, data := range []string{
		"v1:share_role:42",
		"v1:share_role:0:editor",
		"v1:share_role:42:owner",
		"v1:share_view:42:u",
		"v1:share_view:42:x:7",
		"v1:share_view:42:u:0",
		"v1:share_set:42:u:7",
		"v1:share_set:42:u:7:owner",
		"v1:share_revoke:42:u",
		"share_view:42:u:7",
	} {
		if !rejectsShareData(data) {
			t.Fatalf("accepted invalid callback data %q", data)
		}
	}
}

func rejectsShareData(data string) bool {
	if _, _, err := ParseShareSet(data); err == nil {
		return false
	}
	if _, err := ParseShareRef(data, ActionShareView); err == nil {
		return false
	}
	if _, err := ParseShareRef(data, ActionShareRevoke); err == nil {
		return false
	}
	if _, _, err := ParseShareRole(data); err == nil {
		return false
	}
	return true
}

func TestCallbackBuildersFitTelegramLimit(t *testing.T) {
	ref := ShareRef{ListID: 9223372036854775807, ShareID: 9223372036854775807}
	data := []string{
		NavLists, NavNew, NavHelp,
		ListData(1 << 62),
		RenameListData(1 << 62),
		DeleteListData(1 << 62),
		DeleteListYesData(1 << 62),
		SharesData(1 << 62),
		PageData(1<<62, 1<<30),
		ShareAddData(1 << 62),
		ShareRoleData(1<<62, domain.RoleEditor),
		ShareViewData(ref),
		ShareSetData(ref, domain.RoleEditor),
		ShareRevokeData(ref),
		ShareRevokeYesData(ref),
	}
	for _, item := range data {
		if len(item) > MaxCallbackDataLength {
			t.Fatalf("callback data %q is %d bytes, limit %d",
				item, len(item), MaxCallbackDataLength)
		}
	}
}