package test

import (
	"os"
	"path/filepath"
	"strings"
	"sync"
	"testing"
	"time"
)

// TestSayNonBlocking (acceptance criterion non-blocking): `talk say` returns
// well before the announcement ends (exit 0, item ID on stdout); the
// announcement keeps running to completion in the daemon.
func TestSayNonBlocking(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 600*time.Millisecond)
	d := startDaemon(t, root, fake.srv.URL, nil)
	env := daemonEnv(root, d.port, fake.srv.URL, nil)

	start := time.Now()
	res := runTalk(t, env, "say", "long-running announcement")
	elapsed := time.Since(start)

	if res.code != 0 {
		t.Fatalf("talk say: exit %d, stderr: %s", res.code, res.stderr)
	}
	if elapsed >= 500*time.Millisecond {
		t.Fatalf("talk say was blocking (%s; announcement takes 600 ms) — the default must be non-blocking", elapsed)
	}
	id := strings.TrimSpace(res.stdout)
	if id == "" || strings.Contains(id, "\n") {
		t.Errorf("stdout = %q, want exactly one line with the item ID", res.stdout)
	}

	// The announcement still runs to completion (the daemon owns it now).
	hits := fake.waitHits(t, 1)
	if hits[0].Text != "long-running announcement" {
		t.Errorf("hit = %q", hits[0].Text)
	}
	waitStatusIdle(t, d, 3*time.Second)
}

// TestSayWait: `talk say --wait` returns only after the announcement ends.
func TestSayWait(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 400*time.Millisecond)
	d := startDaemon(t, root, fake.srv.URL, nil)
	env := daemonEnv(root, d.port, fake.srv.URL, nil)

	start := time.Now()
	res := runTalk(t, env, "say", "--wait", "wait for me")
	elapsed := time.Since(start)

	if res.code != 0 {
		t.Fatalf("talk say --wait: exit %d, stderr: %s", res.code, res.stderr)
	}
	if elapsed < 350*time.Millisecond {
		t.Fatalf("talk say --wait returned too early (%s; announcement takes 400 ms)", elapsed)
	}
	if hits := fake.waitHits(t, 1); hits[0].Text != "wait for me" {
		t.Errorf("hit = %q", hits[0].Text)
	}
	waitStatusIdle(t, d, 3*time.Second)
}

// TestSayWithoutDaemonSpeaksDirectly: daemon dead and autostart off → talk
// speaks directly in its own process (here: against the fake provider) and
// says so on stderr — nothing fails silently.
func TestSayWithoutDaemonSpeaksDirectly(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 0)
	env := daemonEnv(root, 1, fake.srv.URL, nil) // port 1: daemon guaranteed dead

	res := runTalk(t, env, "say", "offline announcement")
	if res.code != 0 {
		t.Fatalf("talk say (direct): exit %d, stderr: %s", res.code, res.stderr)
	}
	if hits := fake.waitHits(t, 1); hits[0].Text != "offline announcement" {
		t.Errorf("hit = %q", hits[0].Text)
	}
	if !strings.Contains(res.stderr, "speaking directly") {
		t.Errorf("stderr = %q, want the direct-path note (nothing fails silently)", res.stderr)
	}
	if strings.Contains(res.stderr, "daemon started") {
		t.Errorf("stderr = %q — autostart was off, no daemon may be started", res.stderr)
	}
}

// TestSayWithoutDaemonRespectsMute: without a daemon the direct path
// discards announcements silently according to the mute file (and plays
// again after unmute).
func TestSayWithoutDaemonRespectsMute(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 0)
	env := daemonEnv(root, 1, fake.srv.URL, nil)

	// Mute file written straight into the config dir (state "a daemon was
	// here once").
	if err := os.MkdirAll(configDir(root), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(configDir(root), "mute"), []byte("true\n"), 0o644); err != nil {
		t.Fatal(err)
	}

	res := runTalk(t, env, "say", "should stay silent")
	if res.code != 0 {
		t.Fatalf("talk say (mute on): exit %d, stderr: %s", res.code, res.stderr)
	}
	if res.stdout != "muted\n" {
		t.Errorf("stdout = %q, want muted", res.stdout)
	}
	fake.assertNoHits(t, 300*time.Millisecond)

	// Unmute (offline) → plays again.
	res = runTalk(t, env, "unmute")
	if res.code != 0 {
		t.Fatalf("talk unmute (offline): exit %d, stderr: %s", res.code, res.stderr)
	}
	res = runTalk(t, env, "say", "back again")
	if res.code != 0 {
		t.Fatalf("talk say (mute off): exit %d, stderr: %s", res.code, res.stderr)
	}
	if hits := fake.waitHits(t, 1); hits[0].Text != "back again" {
		t.Errorf("hit = %q", hits[0].Text)
	}
}

// TestCliMuteUnmuteStatusCancel: the control commands as daemon calls with
// plain output — mute/unmute as a token, status as a block, cancel with a
// number.
func TestCliMuteUnmuteStatusCancel(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 0)
	d := startDaemon(t, root, fake.srv.URL, nil)
	env := daemonEnv(root, d.port, fake.srv.URL, nil)

	res := runTalk(t, env, "mute")
	if res.code != 0 || res.stdout != "muted\n" {
		t.Fatalf("talk mute: %d %q — stderr: %s", res.code, res.stdout, res.stderr)
	}

	// say while muted: discarded, reported plainly, no provider contact.
	res = runTalk(t, env, "say", "silence")
	if res.code != 0 || res.stdout != "muted\n" {
		t.Fatalf("talk say (mute on): %d %q — stderr: %s", res.code, res.stdout, res.stderr)
	}
	fake.assertNoHits(t, 300*time.Millisecond)

	res = runTalk(t, env, "status")
	if res.code != 0 {
		t.Fatalf("talk status: exit %d — stderr: %s", res.code, res.stderr)
	}
	for _, want := range []string{"version dev", "queue:       0", "mute:        on", "provider:    elevenlabs"} {
		if !strings.Contains(res.stdout, want) {
			t.Errorf("talk status stdout = %q, want %q", res.stdout, want)
		}
	}

	res = runTalk(t, env, "unmute")
	if res.code != 0 || res.stdout != "unmuted\n" {
		t.Fatalf("talk unmute: %d %q — stderr: %s", res.code, res.stdout, res.stderr)
	}

	res = runTalk(t, env, "cancel")
	if res.code != 0 || res.stdout != "cancelled: 0\n" {
		t.Fatalf("talk cancel (empty): %d %q — stderr: %s", res.code, res.stdout, res.stderr)
	}

	res = runTalk(t, env, "status")
	if !strings.Contains(res.stdout, "mute:        off") {
		t.Errorf("talk status after unmute = %q, want mute off", res.stdout)
	}
}

// TestCliCancelWithQueue: cancel via the CLI aborts the running + the
// waiting announcement and reports the count.
func TestCliCancelWithQueue(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 5*time.Second)
	d := startDaemon(t, root, fake.srv.URL, nil)
	env := daemonEnv(root, d.port, fake.srv.URL, nil)

	speak(t, d, `{"text":"blocker"}`)
	fake.waitArrived(t, 1)
	runTalk(t, env, "say", "waiting for cancel") // non-blocking enqueue

	res := runTalk(t, env, "cancel")
	if res.code != 0 || res.stdout != "cancelled: 2\n" {
		t.Fatalf("talk cancel: %d %q — stderr: %s", res.code, res.stdout, res.stderr)
	}

	fake.setDelay(50 * time.Millisecond)
	waitStatusIdle(t, d, 2*time.Second)
	speak(t, d, `{"text":"afterwards"}`)
	hits := fake.waitCompleted(t, 1)
	if hits[0].Text != "afterwards" {
		t.Errorf("hit = %q, want afterwards", hits[0].Text)
	}
}

// TestThreeParallelTalkCalls (acceptance criterion Task 04): `talkd &` +
// three parallel `talk` calls → three announcements one after another. The
// enqueue order of the parallel processes is open — what is checked is that
// all three are played and NO two overlap.
func TestThreeParallelTalkCalls(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 200*time.Millisecond)
	d := startDaemon(t, root, fake.srv.URL, nil)
	env := daemonEnv(root, d.port, fake.srv.URL, nil)

	results := make([]talkResult, 3)
	var wg sync.WaitGroup
	for i, text := range []string{"first", "second", "third"} {
		wg.Add(1)
		go func(i int, text string) {
			defer wg.Done()
			results[i] = runTalk(t, env, "say", text)
		}(i, text)
	}
	wg.Wait()
	for i, res := range results {
		if res.code != 0 {
			t.Fatalf("parallel talk call %d: exit %d — stderr: %s", i, res.code, res.stderr)
		}
	}

	hits := fake.waitCompleted(t, 3)
	played := map[string]bool{}
	for _, h := range hits {
		played[h.Text] = true
	}
	for _, text := range []string{"first", "second", "third"} {
		if !played[text] {
			t.Errorf("announcement %q missing (hits: %+v)", text, hits)
		}
	}
	const slack = 25 * time.Millisecond
	for i := 1; i < len(hits); i++ {
		if hits[i].Start.Before(hits[i-1].End.Add(-slack)) {
			t.Errorf("announcements %d/%d overlapped: start %v < end %v", i-1, i, hits[i].Start, hits[i-1].End)
		}
	}
	waitStatusIdle(t, d, 3*time.Second)
}

// TestCliControlCommandsWithoutDaemon: status/cancel without a daemon are
// clear errors (no silent failure) — say, by contrast, speaks directly.
func TestCliControlCommandsWithoutDaemon(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 0)
	env := daemonEnv(root, 1, fake.srv.URL, nil)

	if res := runTalk(t, env, "status"); res.code != 1 || !strings.Contains(res.stderr, "no daemon") || !strings.Contains(res.stdout, "not running") {
		t.Errorf("talk status without daemon: %d stdout %q stderr %q", res.code, res.stdout, res.stderr)
	}
	if res := runTalk(t, env, "cancel"); res.code != 1 || !strings.Contains(res.stderr, "nothing to cancel") {
		t.Errorf("talk cancel without daemon: %d %q", res.code, res.stderr)
	}
}

// TestSayDefaultPathLikeSay: `talk "text"` takes the same daemon path as
// `talk say "text"` (flags before and after the text).
func TestSayDefaultPathLikeSay(t *testing.T) {
	root := t.TempDir()
	fake := newFakeProvider(t, 0)
	d := startDaemon(t, root, fake.srv.URL, nil)
	env := daemonEnv(root, d.port, fake.srv.URL, nil)

	res := runTalk(t, env, "default call")
	if res.code != 0 {
		t.Fatalf("talk \"text\": exit %d — stderr: %s", res.code, res.stderr)
	}
	if id := strings.TrimSpace(res.stdout); id == "" {
		t.Errorf("stdout = %q, want item ID", res.stdout)
	}

	// Flag after the text (parseInterspersed) on the daemon path.
	res = runTalk(t, env, "another text", "--lang=en")
	if res.code != 0 {
		t.Fatalf("talk text --lang=en: exit %d — stderr: %s", res.code, res.stderr)
	}

	hits := fake.waitHits(t, 2)
	if !strings.Contains(hits[1].Text, "another text") {
		t.Errorf("second hit = %q", hits[1].Text)
	}
	waitStatusIdle(t, d, 3*time.Second)
}