package logging

import (
	"context"
	"log/slog"
	"os"
	"path/filepath"
	"testing"
)

func TestZapHandlerHonorsConfiguredLevel(t *testing.T) {
	root := t.TempDir()
	handler, cleanup := newZapHandler(root, "application.log", Options{Level: "error", Format: "json"})
	defer cleanup()

	if handler.Enabled(context.Background(), slog.LevelInfo) {
		t.Fatal("info should be disabled when level is error")
	}
	if !handler.Enabled(context.Background(), slog.LevelError) {
		t.Fatal("error should be enabled when level is error")
	}
}

func TestZapHandlerUsesDebugFallbackForInvalidLevel(t *testing.T) {
	root := t.TempDir()
	handler, cleanup := newZapHandler(root, "application.log", Options{Level: "not-a-level", Format: "json"})
	defer cleanup()

	if !handler.Enabled(context.Background(), slog.LevelDebug) {
		t.Fatal("invalid levels should use the reference debug fallback")
	}
}

func TestZapHandlerRoutesHTTPAndErrorLogs(t *testing.T) {
	root := t.TempDir()
	handler, cleanup := newZapHandler(root, "application.log", Options{Level: "info", Format: "json"})
	logger := slog.New(handler)
	logger.Info("request", "mod", "http", "request_id", "req-1")
	logger.Error("failed", "mod", "users")
	cleanup()

	dateEntries, err := os.ReadDir(root)
	if err != nil || len(dateEntries) != 1 {
		t.Fatalf("expected one daily log directory, entries=%v err=%v", len(dateEntries), err)
	}
	date := dateEntries[0].Name()
	paths := []string{
		filepath.Join(root, date, "application.log"),
		filepath.Join(root, date, "http", "access.log"),
		filepath.Join(root, date, "users", "application.log"),
		filepath.Join(root, date, "error", "error.log"),
	}
	for _, path := range paths {
		if info, err := os.Stat(path); err != nil || info.Size() == 0 {
			t.Fatalf("expected non-empty routed log %s: info=%v err=%v", path, info, err)
		}
	}
}