package config

import (
	"testing"
	"time"
)

// What counts as a LOCAL model alias, and where that is demanded (ADR-034, ADR-035 review).
// A private transcript may be sent to a local model and to nothing else; the check is a
// guard against a misconfiguration or a crafted alias, so it must be strict about shape,
// not just about a prefix.

func TestIsLocalModel_AcceptsRealLocalAliasesAndNothingShapedLikeAnEscape(t *testing.T) {
	tests := []struct {
		alias string
		want  bool
	}{
		{"koala/phi4-mini", true},
		{"iguana/gemma4-26b", true},
		{"iguana/gemma4-31b-think", true},
		{"koala/qwen36-35b-a3b", true},
		{"iguana/kb-whisper", true},
		{"iguana/hf.co-model_v1:q4", true},
		{"", false},
		{"koala/", false},
		{"iguana/", false},
		{"gemma4-26b", false},
		{"berget/mistral-small", false},
		{"berget/koala/x", false},
		{"xkoala/x", false},
		{"Koala/x", false},
		{" koala/x", false},
		{"koala/x ", false},
		{"koala/x y", false},
		{"koala/x\n", false},
		{"koala/../berget/kb", false},
		{"koala//berget/mistral-small", false},
		{"koala/x/y", false},
		{"koala/x?host=berget", false},
		{"koala/x#frag", false},
		{"koala/x@evil", false},
		{"koalа/x", false}, // Cyrillic а
	}
	for _, tt := range tests {
		t.Run(tt.alias, func(t *testing.T) {
			if got := IsLocalModel(tt.alias); got != tt.want {
				t.Errorf("IsLocalModel(%q) = %v, want %v", tt.alias, got, tt.want)
			}
		})
	}
}

func TestLoad_UploadChatModelMustBeLocalBecauseTheWholeTranscriptIsSentToIt(t *testing.T) {
	for _, alias := range []string{"berget/mistral-small", "gemini/gemini-2.5-pro", "gemma4-26b", "koala/../berget/kb"} {
		t.Run(alias, func(t *testing.T) {
			clearUploadEnv(t)
			setEnv(t, map[string]string{"TAPIR_UPLOAD_CHAT_MODEL": alias})

			if _, err := Load(); err == nil {
				t.Errorf("Load accepted TAPIR_UPLOAD_CHAT_MODEL=%q: a private transcript of up to 90,000 characters would be sent to it", alias)
			}
		})
	}
}

func TestLoad_ALocalUploadChatModelIsAccepted(t *testing.T) {
	clearUploadEnv(t)
	setEnv(t, map[string]string{"TAPIR_UPLOAD_CHAT_MODEL": "iguana/gemma4-31b"})

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if cfg.UploadChatModel != "iguana/gemma4-31b" {
		t.Errorf("UploadChatModel = %q", cfg.UploadChatModel)
	}
}

func TestLoad_TheEngineTimeoutDefaultsToTwentyMinutesAndMustBePositive(t *testing.T) {
	clearUploadEnv(t)
	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if cfg.TranscribeEngineTimeout != 20*time.Minute {
		t.Errorf("TranscribeEngineTimeout = %v, want 20m: a 90-minute recording takes about 8 minutes on kb-whisper, and two wedged engines in sequence must leave the job time to reach a fallback", cfg.TranscribeEngineTimeout)
	}

	setEnv(t, map[string]string{"TAPIR_TRANSCRIBE_ENGINE_TIMEOUT": "7m"})
	cfg, err = Load()
	if err != nil || cfg.TranscribeEngineTimeout != 7*time.Minute {
		t.Errorf("override: %v, %v", cfg.TranscribeEngineTimeout, err)
	}

	for _, bad := range []string{"0", "-1m", "soon"} {
		setEnv(t, map[string]string{"TAPIR_TRANSCRIBE_ENGINE_TIMEOUT": bad})
		if _, err := Load(); err == nil {
			t.Errorf("Load accepted TAPIR_TRANSCRIBE_ENGINE_TIMEOUT=%q", bad)
		}
	}
}