package main

import (
	"os"
	"testing"
)

func TestEan13Check_valid(t *testing.T) {
	tests := []struct {
		body string
		want string
	}{
		{"692045990501", "6920459905012"},
		{"690100000000", "6901000000004"},
		{"690100000099", "6901000000998"},
	}
	for _, tt := range tests {
		got, ok := ean13Check(tt.body)
		if !ok {
			t.Errorf("ean13Check(%q) returned not ok", tt.body)
			continue
		}
		if got != tt.want {
			t.Errorf("ean13Check(%q) = %q, want %q", tt.body, got, tt.want)
		}
	}
}

func TestEan13Check_invalid(t *testing.T) {
	cases := []string{"", "12345", "12345678901", "1234567890123", "69010000a000"}
	for _, body := range cases {
		_, ok := ean13Check(body)
		if ok {
			t.Errorf("ean13Check(%q) should return not ok", body)
		}
	}
}

func TestMd5hex(t *testing.T) {
	got := md5hex("137966")
	if len(got) != 32 {
		t.Errorf("md5hex should return 32-char hex, got len=%d", len(got))
	}
	if got != md5hex("137966") {
		t.Error("md5hex should be deterministic")
	}
	if got == md5hex("other") {
		t.Error("md5hex should differ for different inputs")
	}
}

func TestSanitizeBarcodes(t *testing.T) {
	got := sanitizeBarcodes("6920459905012\n6901028941068  123")
	want := []string{"6920459905012", "6901028941068", "123"}
	if len(got) != len(want) {
		t.Fatalf("len = %d, want %d", len(got), len(want))
	}
	for i := range want {
		if got[i] != want[i] {
			t.Errorf("got[%d] = %q, want %q", i, got[i], want[i])
		}
	}
}

func TestSanitizeBarcodes_empty(t *testing.T) {
	got := sanitizeBarcodes("  \n\t ")
	if len(got) != 0 {
		t.Errorf("expected empty, got %v", got)
	}
}

func TestResolveSdogID_envOverride(t *testing.T) {
	os.Setenv("BYPOS_SDOGID", "999999")
	defer os.Unsetenv("BYPOS_SDOGID")
	got := resolveSdogID("111111")
	if got != "999999" {
		t.Errorf("expected env var override, got %q", got)
	}
}

func TestResolveSdogID_fallback(t *testing.T) {
	os.Unsetenv("BYPOS_SDOGID")
	got := resolveSdogID("111111")
	if got != "111111" {
		t.Errorf("expected fallback to explicit, got %q", got)
	}
}

func TestResolveSdogID_empty(t *testing.T) {
	os.Unsetenv("BYPOS_SDOGID")
	got := resolveSdogID("")
	if got != "" {
		t.Errorf("expected empty, got %q", got)
	}
}

func TestNewCollector_sdogFromEnv(t *testing.T) {
	os.Setenv("BYPOS_SDOGID", "888888")
	defer os.Unsetenv("BYPOS_SDOGID")
	c := NewCollector("")
	if c.sdogID != "888888" {
		t.Errorf("expected sdogID from env, got %q", c.sdogID)
	}
}

func TestStartRejectsEmptySdogID(t *testing.T) {
	os.Unsetenv("BYPOS_SDOGID")
	c := NewCollector("")
	err := c.Start(JobReq{Mode: "list", List: "6920459905012"})
	if err == nil {
		t.Fatal("expected error for empty sdogid")
	}
}