package main

import (
	"errors"
	"flag"
	"os"
	"path/filepath"
	"testing"
)

func TestParseOptionsSupportsHelp(t *testing.T) {
	t.Parallel()

	if _, err := parseOptions([]string{"--help"}); !errors.Is(err, flag.ErrHelp) {
		t.Fatalf("error=%v, want flag.ErrHelp", err)
	}
}

func TestParseOptionsRequiresBootstrapInputs(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name string
		args []string
	}{
		{name: "file", args: []string{"-action", "bootstrap", "-current-jalali-year", "1405", "-reviewer", "reviewer", "-actor", "operator"}},
		{name: "current year", args: []string{"-action", "bootstrap", "-file", "/calendar/reviewed.json", "-reviewer", "reviewer", "-actor", "operator"}},
		{name: "reviewer", args: []string{"-action", "bootstrap", "-file", "/calendar/reviewed.json", "-current-jalali-year", "1405", "-actor", "operator"}},
		{name: "operator", args: []string{"-action", "bootstrap", "-file", "/calendar/reviewed.json", "-current-jalali-year", "1405", "-reviewer", "reviewer"}},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			t.Parallel()
			if _, err := parseOptions(test.args); err == nil {
				t.Fatal("expected missing bootstrap input error")
			}
		})
	}

	options, err := parseOptions([]string{"-action", "bootstrap", "-file", "/calendar/reviewed.json", "-current-jalali-year", "1405", "-reviewer", "reviewer", "-actor", "operator"})
	if err != nil {
		t.Fatal(err)
	}
	if options.action != "bootstrap" || options.currentJalaliYear != 1405 || options.reviewer != "reviewer" || options.actor != "operator" {
		t.Fatalf("options=%+v", options)
	}
}

func TestReadImportRejectsUnknownFieldsAndTrailingDocuments(t *testing.T) {
	t.Parallel()

	directory := t.TempDir()
	tests := []struct {
		name string
		json string
	}{
		{name: "unknown field", json: `{"version":"test","unexpected":true}`},
		{name: "trailing document", json: `{"version":"test"} {}`},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			t.Parallel()
			path := filepath.Join(directory, test.name+".json")
			if err := os.WriteFile(path, []byte(test.json), 0o600); err != nil {
				t.Fatal(err)
			}
			if _, err := readImport(path); err == nil {
				t.Fatal("expected strict JSON error")
			}
		})
	}
}