package api

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"strings"
	"testing"

	hub "git.ipao.vip/rogee/creator-hub/internal/environment"
)

func TestStartUnknownPreservesGatewayFailureReason(t *testing.T) {
	for _, disconnected := range []bool{false, true} {
		t.Run(map[bool]string{false: "server failure", true: "connection lost"}[disconnected], func(t *testing.T) {
			gatewayID := 90 + map[bool]int{false: 1, true: 2}[disconnected]
			store := newMemoryStore()
			accessKey := fmt.Sprintf("error-reason-key-%05d", gatewayID)
			store.gateways["gw-1"] = hub.Gateway{ID: int64(gatewayID), Name: "gw-1", AccessKey: accessKey}
			environment := hub.EnvironmentContext{Env: hub.Env{Alias: "account-a", Gateway: "gw-1", Fingerprint: hub.Fingerprint{Seed: 1}}, AccountID: "account-a", AccountStatus: "active", BindingVersion: 1}
			store.bindings[environment.Alias] = environment
			routes := map[string]string{"GET /v1/browsers": `[]`}
			if !disconnected {
				routes["POST /v1/browsers"] = "503 " + `{"error":"no free Xvfb display is available"}`
			} else {
				routes["POST /v1/browsers"] = "disconnect"
			}
			cleanup := startFakeChannelGateway(t, int64(gatewayID), accessKey, routes)
			defer cleanup()
			finish := func(outcome, reason string, _ hub.EnvironmentContext) error {
				if outcome != "unknown" || reason != "gateway_result_unknown" {
					t.Errorf("unexpected result: %s/%s", outcome, reason)
				}
				return nil
			}
			err := startBrowserRuntime(context.Background(), store, nil, environment, finish)
			want := "no free Xvfb display is available"
			if disconnected {
				want = "gateway start result unknown"
			}
			if err == nil || !strings.Contains(err.Error(), want) {
				t.Fatalf("original startup cause was hidden: %v", err)
			}
		})
	}
}

func TestStartBrowserRuntimeSuccessfulAndFailedCompletion(t *testing.T) {
	for _, existing := range []bool{false, true} {
		for _, finishFails := range []bool{false, true} {
			t.Run(map[bool]string{false: "create", true: "reconcile"}[existing]+map[bool]string{false: " success", true: " finish error"}[finishFails], func(t *testing.T) {
				posts := 0
				runtime := runtimeStatus{ID: "runtime-a", Alias: "account-a", State: "running", NetworkID: "net-a", BindingVersion: 1, ProxyReady: true}
				gatewayID := int64(95)
				store := newMemoryStore()
				store.gateways["gw-1"] = hub.Gateway{ID: gatewayID, Name: "gw-1", AccessKey: fmt.Sprintf("error-reason-key-%05d", gatewayID)}
				runtimeBody, _ := json.Marshal(runtime)
				listBody := `[]`
				if existing {
					listBody = "[" + string(runtimeBody) + "]"
				}
				channelCleanup := startFakeChannelGateway(t, gatewayID, store.gateways["gw-1"].AccessKey, map[string]string{
					"POST /v1/browsers": "201 " + string(runtimeBody),
					"GET /v1/browsers":  "200 " + listBody,
				})
				defer channelCleanup()
				environment := hub.EnvironmentContext{Env: hub.Env{Alias: "account-a", Gateway: "gw-1", Fingerprint: hub.Fingerprint{Seed: 1}}, AccountID: "account-a", AccountStatus: "active", BindingVersion: 1}
				store.bindings[environment.Alias] = environment
				finishErr := errors.New("completion recording failed")
				finish := func(outcome, reason string, current hub.EnvironmentContext) error {
					want := "environment_started"
					if existing {
						want = "gateway_reconciled"
					}
					if outcome != "succeeded" || reason != want || current.RuntimeID != runtime.ID {
						t.Errorf("unexpected completion: %s/%s/%s", outcome, reason, current.RuntimeID)
					}
					if finishFails {
						return finishErr
					}
					return nil
				}
				err := startBrowserRuntime(context.Background(), store, nil, environment, finish)
				if finishFails && !errors.Is(err, finishErr) || !finishFails && err != nil {
					t.Fatalf("unexpected start result: %v", err)
				}
				_ = posts
			})
		}
	}
}

func TestGatewayRejectedPreservesServerFailureReason(t *testing.T) {
	err := gatewayRejected(http.StatusServiceUnavailable, []byte(`{"error":"no free Xvfb display is available"}`))
	if !strings.Contains(err.Error(), "no free Xvfb display is available") {
		t.Fatalf("gateway failure hid its cause: %v", err)
	}
}