package sourcemaps

import (
	"strings"
	"testing"
)

const testMap = `{"version":3,"file":"a.js","sources":["src/a.ts"],"sourcesContent":["const a = 1\nthrow new Error('x')\n"],"names":[],"mappings":"AAAA;AACA"}`

func TestReloadFromDisk(t *testing.T) {
	dir := t.TempDir()
	r, _ := New(dir)
	if err := r.Upload("rel1", "https://h/assets/a.js", strings.NewReader(testMap)); err != nil {
		t.Fatal(err)
	}
	r2, _ := New(dir) // simulates a restart
	if l := r2.List(); len(l) != 1 || l[0].Release != "rel1" || l[0].Source != "/assets/a.js" {
		t.Fatalf("list after reload = %+v", l)
	}
	frames := r2.ResolveFrames("rel1", "Error: x\n    at f (https://h/assets/a.js:2:1)")
	if len(frames) != 1 || frames[0].Status != "mapped" || frames[0].Source != "src/a.ts" || len(frames[0].Context) == 0 {
		t.Fatalf("frames = %+v", frames)
	}
}

func TestLazyLoadAndEviction(t *testing.T) {
	dir := t.TempDir()
	r, _ := New(dir)
	for _, f := range []string{"a", "b", "c"} {
		if err := r.Upload("rel", "/assets/"+f+".js", strings.NewReader(testMap)); err != nil {
			t.Fatal(err)
		}
	}
	r2, _ := New(dir)
	if len(r2.cache) != 0 || len(r2.List()) != 3 {
		t.Fatalf("startup should index without parsing: cached=%d listed=%d", len(r2.cache), len(r2.List()))
	}
	r2.maxBytes = int64(len(testMap)) * 2 // room for two parsed maps
	for _, f := range []string{"a", "b", "c"} {
		if fr := r2.ResolveFrames("rel", "at f (https://h/assets/"+f+".js:2:1)"); len(fr) != 1 || fr[0].Status != "mapped" {
			t.Fatalf("%s not resolved: %+v", f, fr)
		}
	}
	if len(r2.cache) != 2 {
		t.Fatalf("cache should hold 2 entries, has %d", len(r2.cache))
	}
	if r2.get(key("rel", "/assets/a.js")) == nil { // evicted, reloads from disk
		t.Fatal("evicted map did not reload")
	}
}