package starlog

import (
	"bytes"
	"io"
	"testing"
)

func TestNewProductionConfig(t *testing.T) {
	cfg := NewProductionConfig()
	if cfg.Level != LvInfo {
		t.Fatalf("production level should be info, got %d", cfg.Level)
	}
	if cfg.ShowColor {
		t.Fatalf("production should disable color")
	}
	if cfg.ShowStd {
		t.Fatalf("production should disable direct std output")
	}
	if cfg.Formatter == nil {
		t.Fatalf("production should set formatter")
	}
	if _, ok := cfg.Formatter.(*JSONFormatter); !ok {
		t.Fatalf("production formatter should be JSONFormatter")
	}
}

func TestNewDevelopmentConfig(t *testing.T) {
	cfg := NewDevelopmentConfig()
	if cfg.Level != LvDebug {
		t.Fatalf("development level should be debug, got %d", cfg.Level)
	}
	if !cfg.ShowColor || !cfg.OnlyColorLevel {
		t.Fatalf("development should enable level-only color mode")
	}
	if !cfg.ShowFuncName || !cfg.ShowOriginFile || !cfg.ShowFlag {
		t.Fatalf("development should keep rich source fields")
	}
	if cfg.Formatter != nil {
		t.Fatalf("development preset should use built-in text rendering")
	}
}

func TestApplyProductionConfigPreservesWriterAndName(t *testing.T) {
	var buf bytes.Buffer
	logger := NewStarlog(&buf)
	logger.SetName("svc")
	logger.ApplyProductionConfig()

	cfg := logger.GetConfig()
	if cfg.Name != "svc" {
		t.Fatalf("apply production should preserve logger name")
	}
	if cfg.Writer == nil {
		t.Fatalf("apply production should preserve writer")
	}
	if _, ok := cfg.Formatter.(*JSONFormatter); !ok {
		t.Fatalf("apply production should set JSON formatter")
	}
}

func TestPresetConstructors(t *testing.T) {
	prod := NewProduction(io.Discard)
	if prod == nil {
		t.Fatalf("NewProduction should return logger")
	}
	prodCfg := prod.GetConfig()
	if prodCfg.Level != LvInfo {
		t.Fatalf("NewProduction should apply production config")
	}
	if prodCfg.Writer == nil {
		t.Fatalf("NewProduction should keep output writer")
	}

	dev := NewDevelopment(io.Discard)
	if dev == nil {
		t.Fatalf("NewDevelopment should return logger")
	}
	devCfg := dev.GetConfig()
	if devCfg.Level != LvDebug {
		t.Fatalf("NewDevelopment should apply development config")
	}
}