package config

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	"logging-system/logsys"
	"logging-system/sink"
)

func TestLoadEnvOverridesFile(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "log.json")
	raw := []byte(`{
	  "service": "from-file",
	  "level": "debug",
	  "modules": {"engine": "trace"},
	  "redaction": {"enabled": true},
	  "sinks": [{"type": "console", "format": "json", "level": "warn"}]
	}`)
	if err := os.WriteFile(path, raw, 0o644); err != nil {
		t.Fatal(err)
	}
	t.Setenv("LOGSYS_LEVEL", "error")
	t.Setenv("LOGSYS_SERVICE", "from-env")
	t.Setenv("LOGSYS_REDACT", "off")
	cfg, err := Load(path)
	if err != nil {
		t.Fatal(err)
	}
	if cfg.Level != "error" || cfg.Service != "from-env" || cfg.Redaction.Enabled {
		t.Fatalf("%+v", cfg)
	}
	if cfg.Modules["engine"] != "trace" || cfg.Trace.Header != "X-Trace-Id" {
		t.Fatalf("%+v", cfg)
	}
	log, err := Build(cfg)
	if err != nil {
		t.Fatal(err)
	}
	mem := &sink.Memory{}
	log2 := logsys.New(logsys.Options{Service: cfg.Service, Level: logsys.LevelError, Sinks: []logsys.Sink{mem}})
	log2.Info("skip")
	log2.Error("keep", nil)
	if len(mem.Snapshot()) != 1 {
		t.Fatal(mem.Snapshot())
	}
	if err := log.Close(); err != nil {
		t.Fatal(err)
	}
}

func TestBuildFileSink(t *testing.T) {
	dir := t.TempDir()
	cfg := Defaults()
	cfg.Sinks = []SinkConfig{{
		Type:     "file",
		Path:     filepath.Join(dir, "app.jsonl"),
		Format:   "json",
		Rotation: &RotationConfig{MaxBytes: 1024, Keep: 2},
	}}
	log, err := Build(cfg)
	if err != nil {
		t.Fatal(err)
	}
	log.Info("hello", "token", "sk-abcdefghijklmnopqrstuvwxyz")
	if err := log.Sync(); err != nil {
		t.Fatal(err)
	}
	if err := log.Close(); err != nil {
		t.Fatal(err)
	}
	data, err := os.ReadFile(filepath.Join(dir, "app.jsonl"))
	if err != nil {
		t.Fatal(err)
	}
	if string(data) == "" || strings.Contains(string(data), "sk-abcdefghijklmnopqrstuvwxyz") {
		t.Fatalf("redaction failed: %s", data)
	}
}