package main

// gitlab_test.go — PAT connect + project mapping against httptest upstream.

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func newGitLabUpstream(t *testing.T) (*httptest.Server, *GitLab) {
	t.Helper()
	mux := http.NewServeMux()
	mux.HandleFunc("/api/v4/user", func(w http.ResponseWriter, r *http.Request) {
		if r.Header.Get("Private-Token") != "pat-good" {
			w.WriteHeader(http.StatusUnauthorized)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"username":"alice"}`))
	})
	mux.HandleFunc("/api/v4/projects", func(w http.ResponseWriter, r *http.Request) {
		if r.Header.Get("Private-Token") != "pat-good" {
			w.WriteHeader(http.StatusUnauthorized)
			return
		}
		q := r.URL.Query()
		if q.Get("membership") != "true" || q.Get("order_by") != "last_activity_at" {
			w.WriteHeader(http.StatusBadRequest)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`[
			{"path_with_namespace":"team/b","name":"B","namespace":{"path":"team"},
			 "last_activity_at":"2024-02-02T00:00:00Z","web_url":"https://gl/team/b","default_branch":"main"},
			{"path_with_namespace":"team/a","name":"A","namespace":{"path":"team"},
			 "last_activity_at":"2024-03-03T00:00:00Z","web_url":"https://gl/team/a","default_branch":"trunk"}
		]`))
	})
	ts := httptest.NewServer(mux)
	t.Cleanup(ts.Close)
	store := openTestStore(t)
	return ts, NewGitLab(store, ts.URL)
}

func TestGitLabConnectValidatesAndStores(t *testing.T) {
	_, gl := newGitLabUpstream(t)

	if status := gl.Status(); status["connected"] != false {
		t.Fatalf("status before connect = %v", status)
	}

	if _, err := gl.Connect(context.Background(), "pat-bad"); err == nil {
		t.Fatal("bad PAT should fail validation")
	}

	username, err := gl.Connect(context.Background(), "pat-good")
	if err != nil {
		t.Fatalf("connect: %v", err)
	}
	if username != "alice" {
		t.Fatalf("username = %q", username)
	}

	status := gl.Status()
	if status["connected"] != true || status["username"] != "alice" {
		t.Fatalf("status after connect = %v", status)
	}
	if strings.Contains(mustJSON(t, status), "pat-good") {
		t.Fatal("status must never expose the PAT")
	}

	if err := gl.Disconnect(); err != nil {
		t.Fatalf("disconnect: %v", err)
	}
	if status := gl.Status(); status["connected"] != false {
		t.Fatalf("status after disconnect = %v", status)
	}
}

func mustJSON(t *testing.T, v any) string {
	t.Helper()
	b, err := json.Marshal(v)
	if err != nil {
		t.Fatalf("marshal: %v", err)
	}
	return string(b)
}

func TestGitLabReposMappingAndSorting(t *testing.T) {
	_, gl := newGitLabUpstream(t)

	if _, err := gl.Repos(context.Background()); err == nil || !strings.Contains(err.Error(), "not connected") {
		t.Fatalf("repos without connect = %v, want not-connected error", err)
	}

	if _, err := gl.Connect(context.Background(), "pat-good"); err != nil {
		t.Fatalf("connect: %v", err)
	}
	repos, err := gl.Repos(context.Background())
	if err != nil {
		t.Fatalf("repos: %v", err)
	}
	if len(repos) != 2 {
		t.Fatalf("repos = %d, want 2", len(repos))
	}
	want := GitLabRepo{
		Path: "team/a", Name: "A", Namespace: "team",
		LastActivityAt: "2024-03-03T00:00:00Z", WebURL: "https://gl/team/a", DefaultBranch: "trunk",
	}
	if repos[0] != want {
		t.Fatalf("first repo = %+v, want %+v (sorted by activity desc)", repos[0], want)
	}
	encoded := mustJSON(t, repos[0])
	for _, key := range []string{`"path":"team/a"`, `"namespace":"team"`, `"webUrl":"https://gl/team/a"`, `"defaultBranch":"trunk"`} {
		if !strings.Contains(encoded, key) {
			t.Fatalf("repo JSON %s missing %s", encoded, key)
		}
	}
}