package api_test

import (
	"context"
	"encoding/json"
	"net/http"
	"testing"

	"git.ryuvia.com/niklas/terdut-server/internal/api"
)

const (
	operatorKeyOne = "tdsa_operator-key-number-one-0123456789"
	operatorKeyTwo = "tdsa_operator-key-number-two-0123456789"
)

func TestSeedOperatorKey_AuthenticatesAsInstanceAccount(t *testing.T) {
	s := newTS(t)
	if err := api.SeedOperatorKey(context.Background(), s.db, operatorKeyOne); err != nil {
		t.Fatal(err)
	}

	resp := s.reqAs(t, operatorKeyOne, http.MethodPost, "/api/teams", map[string]string{"name": "seeded"})
	resp.Body.Close()
	if resp.StatusCode != http.StatusCreated {
		t.Fatalf("seeded key should create a team, got %d", resp.StatusCode)
	}
}

func TestSeedOperatorKey_RotationReplacesAndIsIdempotent(t *testing.T) {
	s := newTS(t)
	ctx := context.Background()
	for _, key := range []string{operatorKeyOne, operatorKeyOne, operatorKeyTwo} {
		if err := api.SeedOperatorKey(ctx, s.db, key); err != nil {
			t.Fatal(err)
		}
	}

	old := s.reqAs(t, operatorKeyOne, http.MethodGet, "/api/teams", nil)
	old.Body.Close()
	if old.StatusCode != http.StatusUnauthorized {
		t.Errorf("rotated-out key should be refused, got %d", old.StatusCode)
	}
	cur := s.reqAs(t, operatorKeyTwo, http.MethodGet, "/api/teams", nil)
	cur.Body.Close()
	if cur.StatusCode != http.StatusOK {
		t.Errorf("current key should work, got %d", cur.StatusCode)
	}

	var accounts, keys int
	s.db.QueryRow("SELECT COUNT(*) FROM service_accounts WHERE name = 'terdut-operator'").Scan(&accounts)
	s.db.QueryRow("SELECT COUNT(*) FROM service_account_keys").Scan(&keys)
	if accounts != 1 || keys != 1 {
		t.Errorf("expected one account and one key, got %d and %d", accounts, keys)
	}
}

func TestSeedOperatorKey_EmptyKeyDoesNothing(t *testing.T) {
	s := newTS(t)
	if err := api.SeedOperatorKey(context.Background(), s.db, ""); err != nil {
		t.Fatal(err)
	}
	var n int
	s.db.QueryRow("SELECT COUNT(*) FROM service_accounts").Scan(&n)
	if n != 0 {
		t.Errorf("expected no service account, got %d", n)
	}
}

// The instance account configures a team it did not create, which is what lets
// the operator hold one credential instead of one per team, yet it is not a
// member and so reads none of the team's incidents.
func TestInstanceAccount_ActsAsOwnerOfAnyTeamButIsNoMember(t *testing.T) {
	s := newTS(t)
	other := newTeam(t, s, "other")
	if err := api.SeedOperatorKey(context.Background(), s.db, operatorKeyOne); err != nil {
		t.Fatal(err)
	}

	rename := s.reqAs(t, operatorKeyOne, http.MethodPut, "/api/teams/"+id64(other.id), map[string]string{"name": "renamed"})
	rename.Body.Close()
	if rename.StatusCode >= 300 {
		t.Errorf("instance account should rename any team, got %d", rename.StatusCode)
	}

	// Not a member: the team's queue is not visible to it.
	var queue []map[string]any
	decode(t, s.reqAs(t, operatorKeyOne, http.MethodGet, "/api/incidents", nil), &queue)
	if len(queue) != 0 {
		t.Errorf("instance account should see no incidents, got %v", queue)
	}
}

// external_id lets automation find its own team again after a crash, without
// trusting a display name.
func TestCreateTeam_ExternalIDIsIdempotentAndInstanceOnly(t *testing.T) {
	s := newTS(t)
	if err := api.SeedOperatorKey(context.Background(), s.db, operatorKeyOne); err != nil {
		t.Fatal(err)
	}
	create := func(name string) (int, map[string]any) {
		resp := s.reqAs(t, operatorKeyOne, http.MethodPost, "/api/teams",
			map[string]string{"name": name, "external_id": "ns/platform"})
		var out map[string]any
		_ = json.NewDecoder(resp.Body).Decode(&out)
		resp.Body.Close()
		return resp.StatusCode, out
	}

	code, first := create("Platform")
	if code != http.StatusCreated {
		t.Fatalf("first create: %d", code)
	}
	// Same identity, even under a new display name: the same team comes back.
	code, again := create("Platform renamed")
	if code != http.StatusOK || again["id"] != first["id"] {
		t.Errorf("repeat with the same external_id: want 200 and team %v, got %d %v", first["id"], code, again)
	}

	// A different identity cannot take the name.
	resp := s.reqAs(t, operatorKeyOne, http.MethodPost, "/api/teams",
		map[string]string{"name": "Platform", "external_id": "other/platform"})
	resp.Body.Close()
	if resp.StatusCode != http.StatusConflict {
		t.Errorf("taken name under another external_id: want 409, got %d", resp.StatusCode)
	}

	// A person cannot set one.
	resp = s.req(t, http.MethodPost, "/api/teams", map[string]string{"name": "Mine", "external_id": "x/y"})
	resp.Body.Close()
	if resp.StatusCode != http.StatusForbidden {
		t.Errorf("a user setting external_id: want 403, got %d", resp.StatusCode)
	}
}