package update

import (
	"strings"
	"testing"
)

// TestParseVersion 验证 parseVersion 能够解析各种版本号格式，包括带 v/V 前缀、预发布和构建元数据
func TestParseVersion(t *testing.T) {
	tests := []struct {
		input string
		want  string
	}{
		{"v1.2.3", "1.2.3"},
		{"V1.2.3", "1.2.3"},
		{"1.2.3-beta.1", "1.2.3-beta.1"},
		{"v1.2.3+meta", "1.2.3+meta"},
		{"1.2.3-pre.1+build.123", "1.2.3-pre.1+build.123"},
		{"  v2.0.0  ", "2.0.0"},
		{"invalid", ""},
	}

	for _, tt := range tests {
		got, err := parseVersion(strings.TrimSpace(tt.input))
		if tt.want == "" {
			if err == nil {
				t.Errorf("parseVersion(%q) expected error, got %v", tt.input, got)
			}
		} else {
			if err != nil {
				t.Errorf("parseVersion(%q) unexpected error: %v", tt.input, err)
				continue
			}
			if got.String() != tt.want {
				t.Errorf("parseVersion(%q) = %q, want %q", tt.input, got.String(), tt.want)
			}
		}
	}
}

// TestNeedUpdate 验证 needUpdate 在不同版本组合下的判断
func TestNeedUpdate(t *testing.T) {
	tests := []struct {
		current string
		latest  string
		want    bool
	}{
		{"1.0.0", "1.0.1", true},
		{"v1.0.0", "1.1.0", true},
		{"1.2.3", "1.2.3", false},
		{"1.2.4", "1.2.3", false},
		{"1.2.3-beta", "1.2.3", true},
		{"1.2.3", "1.2.3-beta", false},
		{"0.0.5", "0.0.6+build.1", true},
		{"0.0.6", "v0.0.6+build.1", false},
	}

	for _, tt := range tests {
		cur, err := parseVersion(strings.TrimSpace(tt.current))
		if err != nil {
			t.Fatalf("parseVersion(%q) error: %v", tt.current, err)
		}
		lat, err := parseVersion(strings.TrimSpace(tt.latest))
		if err != nil {
			t.Fatalf("parseVersion(%q) error: %v", tt.latest, err)
		}
		got := needUpdate(cur, lat)
		if got != tt.want {
			t.Errorf("needUpdate(%q, %q) = %v, want %v", tt.current, tt.latest, got, tt.want)
		}
	}
}