package config

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

func TestLoadDefaultsWhenMissing(t *testing.T) {
	cfg, err := Load("does-not-exist.toml")
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if cfg.OSC.Host != "127.0.0.1" || cfg.OSC.Port != 9001 {
		t.Fatalf("unexpected defaults: %+v", cfg.OSC)
	}
}

func TestLoadOSCValues(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "config.toml")
	if err := os.WriteFile(path, []byte("[osc]\nhost = \"0.0.0.0\"\nport = 9002\n"), 0o600); err != nil {
		t.Fatalf("WriteFile: %v", err)
	}
	cfg, err := Load(path)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if cfg.OSC.Host != "0.0.0.0" || cfg.OSC.Port != 9002 {
		t.Fatalf("unexpected values: %+v", cfg.OSC)
	}
}

func TestLoadGUIValues(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "config.toml")
	if err := os.WriteFile(path, []byte("[gui]\ntop_most = true\nfont_size = 24\nauto_unmute_on_self_leave = true\nrefresh_interval_value = 5\nrefresh_interval_unit = \"min\"\nhistory_regex = \"[wip]\"\nhistory_from = \"2026-01-01\"\nhistory_to = \"2026-01-31\"\nhistory_export_dir = \"C:/tmp/visit\"\nhistory_export_include_time = false\nhistory_export_include_world = true\nhistory_export_include_join_leave = true\nhistory_export_custom_enabled = true\nhistory_export_custom = \"[wip]\"\n"), 0o600); err != nil {
		t.Fatalf("WriteFile: %v", err)
	}
	cfg, err := Load(path)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if cfg.GUI.TopMost != true || cfg.GUI.FontSize != 24 || cfg.GUI.AutoUnmuteOnSelfLeave != true || cfg.GUI.RefreshIntervalValue != 5 || cfg.GUI.RefreshIntervalUnit != "min" || cfg.GUI.HistoryRegex != "[wip]" || cfg.GUI.HistoryFromDate != "2026-01-01" || cfg.GUI.HistoryToDate != "2026-01-31" || cfg.GUI.HistoryExportDir != "C:/tmp/visit" || cfg.GUI.HistoryExportIncludeTime != false || cfg.GUI.HistoryExportIncludeWorld != true || cfg.GUI.HistoryExportIncludeJoinLeave != true || cfg.GUI.HistoryExportCustomEnabled != true || cfg.GUI.HistoryExportCustom != "[wip]" {
		t.Fatalf("unexpected gui values: %+v", cfg.GUI)
	}
}

func TestSaveGUIUpdatesSection(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "config.toml")
	initial := []byte("[self]\nname = \"alice\"\n\n[gui]\ntop_most = false\nfont_size = 18\n")
	if err := os.WriteFile(path, initial, 0o600); err != nil {
		t.Fatalf("WriteFile: %v", err)
	}
	if err := SaveGUI(path, GUIConfig{TopMost: true, FontSize: 26, AutoUnmuteOnSelfLeave: true, RefreshIntervalValue: 3, RefreshIntervalUnit: "sec", HistoryRegex: "[wip]", HistoryFromDate: "2026-01-01", HistoryToDate: "2026-01-31", HistoryExportDir: "C:/tmp/visit", HistoryExportIncludeTime: false, HistoryExportIncludeWorld: true, HistoryExportIncludeJoinLeave: true, HistoryExportCustomEnabled: true, HistoryExportCustom: "[wip]"}); err != nil {
		t.Fatalf("SaveGUI returned error: %v", err)
	}
	cfg, err := Load(path)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if cfg.GUI.TopMost != true || cfg.GUI.FontSize != 26 || cfg.GUI.AutoUnmuteOnSelfLeave != true || cfg.GUI.RefreshIntervalValue != 3 || cfg.GUI.RefreshIntervalUnit != "sec" || cfg.GUI.HistoryRegex != "[wip]" || cfg.GUI.HistoryFromDate != "2026-01-01" || cfg.GUI.HistoryToDate != "2026-01-31" || cfg.GUI.HistoryExportDir != "C:/tmp/visit" || cfg.GUI.HistoryExportIncludeTime != false || cfg.GUI.HistoryExportIncludeWorld != true || cfg.GUI.HistoryExportIncludeJoinLeave != true || cfg.GUI.HistoryExportCustomEnabled != true || cfg.GUI.HistoryExportCustom != "[wip]" {
		t.Fatalf("unexpected saved gui values: %+v", cfg.GUI)
	}
	data, err := os.ReadFile(path)
	if err != nil {
		t.Fatalf("ReadFile: %v", err)
	}
	text := string(data)
	if !strings.Contains(text, "[self]") || !strings.Contains(text, "name = \"alice\"") {
		t.Fatalf("non-gui config content was lost: %s", text)
	}
}