package acp_test

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	"codeberg.org/turbo-editors/turbo-core/acp"
)

func TestAnUpdateThatCannotBeDecodedIsCountedAndNamed(t *testing.T) {
	session, agent := start(t, acp.Options{})
	id := agent.handshake()
	waitFor(t, "ready", session.Ready)

	// input as a string, where the protocol has an object. An agent that did
	// this would otherwise have its commands vanish without a trace.
	agent.update(id, `{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"web","input":"query"}]}`)
	agent.update(id, `{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"still here"}}`)
	waitFor(t, "the message after it", func() bool {
		return textOf(session.Entries(), acp.EntryAgent) == "still here"
	})

	if session.Unknown() != 1 {
		t.Errorf("Unknown() = %d, want the undecodable update counted", session.Unknown())
	}
	got := session.Unreadable()
	if !strings.HasPrefix(got, "available_commands_update: ") {
		t.Errorf("Unreadable() = %q, want it to name the update's kind", got)
	}
	if len(session.Commands()) != 0 {
		t.Error("a half-decoded command list was kept")
	}
}

func TestTheTraceRecordsEachLineInEachDirection(t *testing.T) {
	path := filepath.Join(t.TempDir(), "acp.log")
	t.Setenv(acp.TraceEnv, path)

	agent, stream := newFakeAgent(t)
	session := acp.NewSession(acp.TraceStreamForTest(stream), acp.Agent{Name: "Bob"}, t.TempDir(), acp.Options{})
	agent.handshake()
	waitFor(t, "ready", session.Ready)
	_ = session.Close() // flushes the trace

	data, err := os.ReadFile(path)
	if err != nil {
		t.Fatalf("reading the trace: %v", err)
	}
	text := string(data)

	for _, want := range []string{"-> ", `"method":"initialize"`, "<- ", `"sessionId"`} {
		if !strings.Contains(text, want) {
			t.Errorf("the trace lacks %q:\n%s", want, text)
		}
	}
	lines := strings.Split(strings.TrimSpace(text), "\n")
	if len(lines) != 4 {
		t.Errorf("the trace has %d lines, want the four messages of a handshake:\n%s", len(lines), text)
	}
	for _, line := range lines {
		if !strings.Contains(line, " -> ") && !strings.Contains(line, " <- ") {
			t.Errorf("a traced line has no direction mark: %q", line)
		}
	}
}