// output_test.go 驗證共用輸出：JSON 物件順序、空清單、table 對齊與
// 格式解析。
package gitea

import (
	"bytes"
	"encoding/json"
	"strings"
	"testing"
)

var demoFields = []Field{
	{Name: "type"},
	{Name: "number"},
}

func TestPrintListJSON(t *testing.T) {
	var b bytes.Buffer
	p := Printer{Format: FormatJSON, Out: &b}
	err := p.PrintList(demoFields, []Values{{"issue", 5}, {"pull", 7}})
	if err != nil {
		t.Fatal(err)
	}
	var got []map[string]any
	if err := json.Unmarshal(b.Bytes(), &got); err != nil {
		t.Fatalf("invalid JSON %q: %v", b.String(), err)
	}
	if len(got) != 2 || got[0]["type"] != "issue" || got[1]["number"] != float64(7) {
		t.Fatalf("unexpected payload: %v", got)
	}
}

func TestPrintListEmptyJSONArray(t *testing.T) {
	var b bytes.Buffer
	p := Printer{Format: FormatJSON, Out: &b}
	if err := p.PrintList(demoFields, nil); err != nil {
		t.Fatal(err)
	}
	if strings.TrimSpace(b.String()) != "[]" {
		t.Fatalf("want [], got %q", b.String())
	}
}

func TestPrintNull(t *testing.T) {
	var b bytes.Buffer
	p := Printer{Format: FormatJSON, Out: &b}
	if err := p.PrintNull(); err != nil {
		t.Fatal(err)
	}
	if strings.TrimSpace(b.String()) != "null" {
		t.Fatalf("want null, got %q", b.String())
	}
}

func TestPrintTable(t *testing.T) {
	var b bytes.Buffer
	p := Printer{Format: FormatTable, Out: &b}
	if err := p.PrintList(demoFields, []Values{{"issue", 5}}); err != nil {
		t.Fatal(err)
	}
	out := b.String()
	for _, want := range []string{"type", "number", "issue", "5"} {
		if !strings.Contains(out, want) {
			t.Fatalf("table missing %q:\n%s", want, out)
		}
	}
	if !strings.Contains(out, "─") {
		t.Fatalf("table should have separator:\n%s", out)
	}
}

func TestParseFormat(t *testing.T) {
	for in, want := range map[string]Format{
		"":        FormatJSON,
		"json":    FormatJSON,
		"JSON":    FormatJSON,
		"table":   FormatTable,
		" Table ": FormatTable,
	} {
		got, err := ParseFormat(in)
		if err != nil || got != want {
			t.Errorf("ParseFormat(%q) = %v, %v; want %v", in, got, err, want)
		}
	}
	if _, err := ParseFormat("yaml"); err == nil {
		t.Error("yaml should be rejected")
	}
}