package api_test

import (
	"database/sql"
	"io"
	"net/http/httptest"
	"os"
	"strings"
	"testing"

	"git.simponic.xyz/simponic/phoneof/api"
	"git.simponic.xyz/simponic/phoneof/args"
	"git.simponic.xyz/simponic/phoneof/database"
	"git.simponic.xyz/simponic/phoneof/utils"
)

func setup(t *testing.T) (*sql.DB, *httptest.Server) {
	randomDb := utils.RandomId()

	testDb := database.MakeConn(&randomDb)
	database.Migrate(testDb)

	arguments := &args.Arguments{
		TemplatePath: "../templates",
		StaticPath:   "../static",
	}

	mux := api.MakeMux(arguments, testDb)
	testServer := httptest.NewServer(mux)

	t.Cleanup(func() {
		testServer.Close()
		testDb.Close()
		os.Remove(randomDb)
	})
	return testDb, testServer
}

func assertResponseCode(t *testing.T, resp *httptest.ResponseRecorder, statusCode int) {
	if resp.Code != statusCode {
		t.Errorf("code is unexpected: %d, expected %d", resp.Code, statusCode)
	}
}

func assertResponseBody(t *testing.T, resp *httptest.ResponseRecorder, body string) {
	buf := new(strings.Builder)
	_, err := io.Copy(buf, resp.Body)
	if err != nil {
		panic("could not read response body")
	}
	bodyStr := buf.String()
	if bodyStr != body {
		t.Errorf("body is unexpected: %s, expected %s", bodyStr, body)
	}
}

func TestHealthcheck(t *testing.T) {
	_, testServer := setup(t)

	req := httptest.NewRequest("GET", "/health", nil)
	resp := httptest.NewRecorder()
	testServer.Config.Handler.ServeHTTP(resp, req)

	assertResponseCode(t, resp, 200)
	assertResponseBody(t, resp, "healthy")
}

func TestHello(t *testing.T) {
	_, testServer := setup(t)

	req := httptest.NewRequest("GET", "/", nil)
	resp := httptest.NewRecorder()
	testServer.Config.Handler.ServeHTTP(resp, req)

	assertResponseCode(t, resp, 200)
}

func TestCachingStaticFiles(t *testing.T) {
	_, testServer := setup(t)

	req := httptest.NewRequest("GET", "/static/css/styles.css", nil)
	resp := httptest.NewRecorder()
	testServer.Config.Handler.ServeHTTP(resp, req)

	assertResponseCode(t, resp, 200)
	if resp.Header().Get("Cache-Control") != "public, max-age=3600" {
		t.Errorf("client cache will live indefinitely for static files, which is probably not great! %s", resp.Header().Get("Cache-Control"))
	}
}