package config

import (
	"bytes"
	"git.yuntuo.hk/k2safe/go-omni/logx"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestFileMergeAndSafeReload(t *testing.T) {
	path := filepath.Join(t.TempDir(), "service.yaml")
	write := func(raw string) {
		t.Helper()
		if err := os.WriteFile(path, []byte(raw), 0600); err != nil {
			t.Fatal(err)
		}
	}
	write("address: ':8123'\nshutdownTimeout: 7s\nlog:\n  level: info\n")
	t.Setenv("TEST_MODULE_HTTP_ADDR", ":9123")
	cfg, err := LoadFile(path, "TEST_MODULE_")
	if err != nil || cfg.Address != ":9123" || cfg.ShutdownTimeout != 7*time.Second {
		t.Fatal(cfg, err)
	}
	var output bytes.Buffer
	lc := cfg.Log
	lc.Writer = &output
	l, err := logx.New(lc)
	if err != nil {
		t.Fatal(err)
	}
	defer l.Close()
	child := l.With("scope", "test")
	r, err := NewReloader(path, "TEST_MODULE_", l)
	if err != nil {
		t.Fatal(err)
	}
	child.Debug("hidden")
	write("address: ':8123'\nshutdownTimeout: 7s\nlog:\n  level: debug\n")
	if err = r.Reload(); err != nil {
		t.Fatal(err)
	}
	child.Debug("visible")
	if strings.Contains(output.String(), "hidden") || !strings.Contains(output.String(), "visible") {
		t.Fatal(output.String())
	}
	write("shutdownTimeout: 8s\nlog:\n  level: error\n")
	if err = r.Reload(); err == nil || r.Snapshot().Log.Level != "debug" {
		t.Fatal("static reload changed live config", err)
	}
	for _, raw := range []string{"unknownOption: true", "log:\n  level: bad", "shutdownTimeout: invalid", "address: x\naddress: y", "---\n{}\n---\n{}"} {
		write(raw)
		if err = r.Reload(); err == nil {
			t.Fatal(raw)
		}
	}
}