package log

import (
	"bytes"
	"testing"

	"github.com/rs/zerolog"
)

// TestSetSeqWriter_ConsoleMinLevelBecomesInfo 验证挂 Seq 后控制台门槛降到 Info（而非 Warn）
func TestSetSeqWriter_ConsoleMinLevelBecomesInfo(t *testing.T) {
	l := NewLogger(1, "", 0)
	if got := zerolog.Level(l.console.minLevel.Load()); got != zerolog.DebugLevel {
		t.Fatalf("初始 console minLevel=%v want Debug", got)
	}
	// seqUrl 不必可达：SeqWriter 异步 channel 推送，Write 不阻塞
	l.SetSeqWriter("http://127.0.0.1:1", "", "test:level")
	defer l.CloseSeq()
	if got := zerolog.Level(l.console.minLevel.Load()); got != zerolog.InfoLevel {
		t.Fatalf("挂 Seq 后 console minLevel=%v want Info", got)
	}
}

// TestSetConsoleMinLevel_OverridesToWarn 验证导出方法可将 console 门槛单独收紧到 Warn，
// 用于访问日志等高噪声 Logger 在挂 Seq 后仍保持 Warn+。
func TestSetConsoleMinLevel_OverridesToWarn(t *testing.T) {
	l := NewLogger(1, "", 0)
	l.SetSeqWriter("http://127.0.0.1:1", "", "test:override")
	defer l.CloseSeq()

	l.SetConsoleMinLevel(zerolog.WarnLevel)
	if got := zerolog.Level(l.console.minLevel.Load()); got != zerolog.WarnLevel {
		t.Fatalf("SetConsoleMinLevel 后 minLevel=%v want Warn", got)
	}

	var buf bytes.Buffer
	l.console.inner = &buf
	if _, err := l.console.WriteLevel(zerolog.InfoLevel, []byte("info-line\n")); err != nil {
		t.Fatal(err)
	}
	if buf.Len() != 0 {
		t.Fatalf("Info 应被 Warn 门槛丢弃，实际写入: %q", buf.String())
	}
	if _, err := l.console.WriteLevel(zerolog.WarnLevel, []byte("warn-line\n")); err != nil {
		t.Fatal(err)
	}
	if !bytes.Contains(buf.Bytes(), []byte("warn-line")) {
		t.Fatalf("Warn 应放行，实际: %q", buf.String())
	}
}

// TestLevelFilterWriter_WriteLevel_DropAndPass 直接验证 levelFilterWriter.WriteLevel
// 对低于门槛的级别丢弃（但仍返回成功），达到门槛的放行。
func TestLevelFilterWriter_WriteLevel_DropAndPass(t *testing.T) {
	var buf bytes.Buffer
	w := newLevelFilterWriter(&buf, zerolog.WarnLevel)

	n, err := w.WriteLevel(zerolog.DebugLevel, []byte("debug-msg"))
	if err != nil || n != len("debug-msg") {
		t.Fatalf("Debug 丢弃返回值异常: n=%d err=%v", n, err)
	}
	if buf.Len() != 0 {
		t.Fatalf("Debug 不应写入 inner: %q", buf.String())
	}

	n, err = w.WriteLevel(zerolog.InfoLevel, []byte("info-msg"))
	if err != nil || n != len("info-msg") {
		t.Fatalf("Info 丢弃返回值异常: n=%d err=%v", n, err)
	}
	if buf.Len() != 0 {
		t.Fatalf("Info 不应写入 inner: %q", buf.String())
	}

	if _, err := w.WriteLevel(zerolog.WarnLevel, []byte("warn-msg")); err != nil {
		t.Fatal(err)
	}
	if !bytes.Contains(buf.Bytes(), []byte("warn-msg")) {
		t.Fatalf("Warn 应放行: %q", buf.String())
	}

	if _, err := w.WriteLevel(zerolog.ErrorLevel, []byte("error-msg")); err != nil {
		t.Fatal(err)
	}
	if !bytes.Contains(buf.Bytes(), []byte("error-msg")) {
		t.Fatalf("Error 应放行: %q", buf.String())
	}
}