package apiversion

import "testing"

func TestParse(t *testing.T) {
	tests := []struct {
		name    string
		raw     string
		valid   bool
		version Version
	}{
		{name: "empty", raw: "", valid: false},
		{name: "invalid text", raw: "abc", valid: false},
		{name: "missing patch", raw: "1.0", valid: false},
		{name: "exact", raw: "1.0.0", valid: true, version: Version{Major: 1, Minor: 0, Patch: 0}},
		{name: "with prefix", raw: "v1.2.3", valid: true, version: Version{Major: 1, Minor: 2, Patch: 3}},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			version, ok := Parse(tt.raw)
			if ok != tt.valid {
				t.Fatalf("expected valid=%v, got %v", tt.valid, ok)
			}
			if tt.valid && version != tt.version {
				t.Fatalf("expected version=%+v, got %+v", tt.version, version)
			}
		})
	}
}

func TestUseLatest(t *testing.T) {
	tests := []struct {
		name      string
		header    string
		threshold string
		expect    bool
	}{
		{name: "missing header", header: "", threshold: "1.0.0", expect: false},
		{name: "invalid header", header: "invalid", threshold: "1.0.0", expect: false},
		{name: "equal threshold", header: "1.0.0", threshold: "1.0.0", expect: false},
		{name: "greater threshold", header: "1.0.1", threshold: "1.0.0", expect: true},
		{name: "greater with v prefix", header: "v1.2.3", threshold: "1.0.0", expect: true},
		{name: "less than threshold", header: "0.9.9", threshold: "1.0.0", expect: false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := UseLatest(tt.header, tt.threshold)
			if result != tt.expect {
				t.Fatalf("expected %v, got %v", tt.expect, result)
			}
		})
	}
}