package bonfire

import (
	"runtime/debug"
	"testing"
)

// TestVersionHeader: the list header and BuildVersion for a tagged
// framework dependency, a replaced (local) one, a go.work build (devel)
// and the summer tool's own build, read through an injected build info.
func TestVersionHeader(t *testing.T) {
	headers := []struct {
		v    Version
		name string
		want string
	}{
		{Version{App: "v1.4.0", Framework: "v0.3.2"}, "acme", "SummerCMS acme v1.4.0 (framework v0.3.2)"},
		{Version{App: "devel", Framework: "v0.4.0", Local: true}, "acme", "SummerCMS acme devel (framework v0.4.0, local)"},
		{Version{App: "v1.4.1-0.20261021120000-abcdef123456+dirty", Framework: "(devel)"}, "acme", "SummerCMS acme v1.4.1-0.20261021120000-abcdef123456+dirty (framework devel)"},
		// Equal versions collapse to one, as for the summer tool's own build.
		{Version{App: "(devel)", Framework: "(devel)"}, "acme", "SummerCMS acme devel"},
		{Version{App: "v0.4.0", Framework: "v0.4.0"}, "summer", "SummerCMS summer v0.4.0"},
		{Version{App: "v0.4.0", Framework: "v0.4.0", Local: true}, "acme", "SummerCMS acme v0.4.0 (framework v0.4.0, local)"},
		{Version{}, "acme", "SummerCMS acme devel"},
	}
	for _, tc := range headers {
		if got := tc.v.Header(tc.name); got != tc.want {
			t.Errorf("%+v.Header(%q) = %q, want %q", tc.v, tc.name, got, tc.want)
		}
	}

	dep := func(version string, replaced bool) *debug.Module {
		m := &debug.Module{Path: frameworkModule, Version: version}
		if replaced {
			m.Replace = &debug.Module{Path: "../summercms.go", Version: "(devel)"}
		}
		return m
	}
	builds := []struct {
		name string
		info *debug.BuildInfo
		ok   bool
		want Version
	}{
		{"tagged", &debug.BuildInfo{Main: debug.Module{Path: "example.com/acme", Version: "v1.4.0"},
			Deps: []*debug.Module{{Path: "example.com/other", Version: "v9.9.9"}, dep("v0.3.2", false)}},
			true, Version{App: "v1.4.0", Framework: "v0.3.2"}},
		{"replaced", &debug.BuildInfo{Main: debug.Module{Path: "example.com/acme", Version: "(devel)"},
			Deps: []*debug.Module{dep("v0.4.0", true)}},
			true, Version{App: "devel", Framework: "v0.4.0", Local: true}},
		{"go.work", &debug.BuildInfo{Main: debug.Module{Path: "example.com/acme", Version: "v1.4.1-0.20261021120000-abcdef123456+dirty"},
			Deps: []*debug.Module{dep("(devel)", false)}},
			true, Version{App: "v1.4.1-0.20261021120000-abcdef123456+dirty", Framework: "devel"}},
		{"no framework dep", &debug.BuildInfo{Main: debug.Module{Path: "example.com/acme", Version: "v1.0.0"}},
			true, Version{App: "v1.0.0", Framework: "devel"}},
		{"summer", &debug.BuildInfo{Main: debug.Module{Path: frameworkModule, Version: "v0.4.0"}},
			true, Version{App: "v0.4.0", Framework: "v0.4.0"}},
		{"no build info", nil, false, Version{App: "devel", Framework: "devel"}},
	}
	for _, tc := range builds {
		t.Run(tc.name, func(t *testing.T) {
			prev := readBuildInfo
			t.Cleanup(func() { readBuildInfo = prev })
			readBuildInfo = func() (*debug.BuildInfo, bool) { return tc.info, tc.ok }
			if got := BuildVersion(); got != tc.want {
				t.Errorf("BuildVersion() = %+v, want %+v", got, tc.want)
			}
		})
	}

	// The test binary is built from the framework module itself.
	if got := BuildVersion(); got.App != got.Framework || got.Local {
		t.Errorf("the framework's own build = %+v, want App == Framework", got)
	}
}