package config

import (
	"path/filepath"
	"testing"
	"time"
)

func writeConfig(t *testing.T, body string) string {
	t.Helper()
	p := filepath.Join(t.TempDir(), "mavend.json")
	if err := writeFile(t, p, body); err != nil {
		t.Fatalf("write config: %v", err)
	}
	return p
}

func TestLoadDefaults(t *testing.T) {
	p := writeConfig(t, `{}`)
	c, err := Load(p)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if time.Duration(c.TickInterval) != DefaultTickInterval {
		t.Errorf("TickInterval default = %v, want %v", c.TickInterval, DefaultTickInterval)
	}
	if time.Duration(c.RepeatInterval) != DefaultRepeatInterval {
		t.Errorf("RepeatInterval default = %v, want %v", c.RepeatInterval, DefaultRepeatInterval)
	}
	if c.DBPath == "" {
		t.Error("DBPath default not applied")
	}
	if c.SocketPath == "" {
		t.Error("SocketPath default not applied")
	}
}

func TestLoadDurationsParse(t *testing.T) {
	p := writeConfig(t, `{"tick_interval":"90s","repeat_interval":"10m"}`)
	c, err := Load(p)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if time.Duration(c.TickInterval) != 90*time.Second {
		t.Errorf("TickInterval = %v, want 90s", c.TickInterval)
	}
	if time.Duration(c.RepeatInterval) != 10*time.Minute {
		t.Errorf("RepeatInterval = %v, want 10m", c.RepeatInterval)
	}
}

func TestLoadBadDurationRejected(t *testing.T) {
	p := writeConfig(t, `{"tick_interval":"not-a-duration"}`)
	if _, err := Load(p); err == nil {
		t.Fatal("Load succeeded for a bad duration; want error")
	}
}

func TestLoadMissingFile(t *testing.T) {
	p := filepath.Join(t.TempDir(), "nonexistent.json")
	if _, err := Load(p); err == nil {
		t.Fatal("Load succeeded for a missing file; want error")
	}
}

func TestVoiceEnabledRequiresBind(t *testing.T) {
	// enabled=true without bind is refused — the voice surface can't
	// default a bind (127.0.0.1 too relaxed for production, a wg addr is
	// the user's). surfacing the gap explicitly beats an idle listener.
	p := writeConfig(t, `{"voice":{"enabled":true}}`)
	if _, err := Load(p); err == nil {
		t.Fatal("Load succeeded for voice.enabled=true with no bind; want error")
	}
}

func TestVoiceEnabledWithBindOK(t *testing.T) {
	// voice surface fully configured — accepted (the daemon wires Stub tts +
	// voicesink; no models on disk required).
	p := writeConfig(t, `{"voice":{"enabled":true,"bind":"127.0.0.1:9100"}}`)
	if _, err := Load(p); err != nil {
		t.Fatalf("Load: %v", err)
	}
}

func TestVoicePresentDisabledOK(t *testing.T) {
	// voice block present but not enabled — acceptable (the listener stays
	// down; the routing table's ChannelVoice selections drop).
	p := writeConfig(t, `{"voice":{"enabled":false}}`)
	if _, err := Load(p); err != nil {
		t.Fatalf("Load: %v", err)
	}
}

func TestVoiceSttTtsConfigParsed(t *testing.T) {
	// the stt/tts worker sub-blocks parse + remember socket/lang.
	p := writeConfig(t, `{
		"voice": {
			"enabled": true, "bind": "127.0.0.1:9100",
			"stt": {"socket": "/tmp/stt.sock", "lang": "ru"},
			"tts": {"socket": "/tmp/tts.sock", "lang": "ru", "voice": "natasha"}
		}
	}`)
	c, err := Load(p)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if c.Voice.Stt == nil || c.Voice.Stt.Socket != "/tmp/stt.sock" {
		t.Fatalf("Stt config not parsed: %+v", c.Voice)
	}
	if c.Voice.Tts == nil || c.Voice.Tts.Socket != "/tmp/tts.sock" || c.Voice.Tts.Voice != "natasha" {
		t.Fatalf("Tts config not parsed: %+v", c.Voice)
	}
}

func TestDurationRoundTrip(t *testing.T) {
	d := Duration(15 * time.Minute)
	b, err := d.MarshalJSON()
	if err != nil {
		t.Fatalf("MarshalJSON: %v", err)
	}
	if got, want := string(b), `"15m0s"`; got != want {
		t.Errorf("MarshalJSON = %s, want %s", got, want)
	}
	var d2 Duration
	if err := d2.UnmarshalJSON(b); err != nil {
		t.Fatalf("UnmarshalJSON: %v", err)
	}
	if d2 != d {
		t.Errorf("round-trip = %v, want %v", d2, d)
	}
}