package pluginhost

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/router-for-me/CLIProxyAPI/v7/sdk/pluginapi"
)

func TestRegisterManagementRoutesSkipsReservedAndUsesPriority(t *testing.T) {
	high := &managementPluginDouble{
		routes: []pluginapi.ManagementRoute{
			{Method: http.MethodGet, Path: "/config", Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
				return pluginapi.ManagementResponse{Body: []byte("reserved")}, nil
			})},
			{Method: http.MethodGet, Path: "/plugins/shared/status", Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
				return pluginapi.ManagementResponse{Body: []byte("high")}, nil
			})},
		},
	}
	low := &managementPluginDouble{
		routes: []pluginapi.ManagementRoute{
			{Method: http.MethodGet, Path: "/plugins/shared/status", Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
				return pluginapi.ManagementResponse{Body: []byte("low")}, nil
			})},
			{Method: http.MethodPost, Path: "plugins/low/run", Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
				return pluginapi.ManagementResponse{StatusCode: http.StatusAccepted, Body: []byte("low-only")}, nil
			})},
		},
	}
	host := newHostWithRecords(
		capabilityRecord{id: "low", priority: 1, plugin: pluginapi.Plugin{Capabilities: pluginapi.Capabilities{ManagementAPI: low}}},
		capabilityRecord{id: "high", priority: 10, plugin: pluginapi.Plugin{Capabilities: pluginapi.Capabilities{ManagementAPI: high}}},
	)
	host.RegisterManagementRoutes(context.Background(), map[string]struct{}{
		"GET /v0/management/config": {},
	})

	req := httptest.NewRequest(http.MethodGet, "/v0/management/plugins/shared/status", nil)
	rec := httptest.NewRecorder()
	if !host.ServeManagementHTTP(rec, req) {
		t.Fatal("ServeManagementHTTP() = false, want true")
	}
	if rec.Body.String() != "high" {
		t.Fatalf("Body = %q, want high", rec.Body.String())
	}

	req = httptest.NewRequest(http.MethodPost, "/v0/management/plugins/low/run", nil)
	rec = httptest.NewRecorder()
	if !host.ServeManagementHTTP(rec, req) {
		t.Fatal("ServeManagementHTTP() for low route = false, want true")
	}
	if rec.Code != http.StatusAccepted || rec.Body.String() != "low-only" {
		t.Fatalf("response = %d %q, want 202 low-only", rec.Code, rec.Body.String())
	}

	req = httptest.NewRequest(http.MethodGet, "/v0/management/config", nil)
	rec = httptest.NewRecorder()
	if host.ServeManagementHTTP(rec, req) {
		t.Fatal("reserved route was served by plugin")
	}
}

func TestManagementHandlerPanicFusesPlugin(t *testing.T) {
	host := newHostWithRecords(capabilityRecord{
		id: "panic",
		plugin: pluginapi.Plugin{Capabilities: pluginapi.Capabilities{
			ManagementAPI: &managementPluginDouble{routes: []pluginapi.ManagementRoute{{
				Method: http.MethodGet,
				Path:   "/plugins/panic",
				Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
					panic("boom")
				}),
			}}},
		}},
	})
	host.RegisterManagementRoutes(context.Background(), nil)

	req := httptest.NewRequest(http.MethodGet, "/v0/management/plugins/panic", nil)
	rec := httptest.NewRecorder()
	if !host.ServeManagementHTTP(rec, req) {
		t.Fatal("ServeManagementHTTP() = false, want true")
	}
	if rec.Code != http.StatusBadGateway {
		t.Fatalf("status = %d, want 502", rec.Code)
	}
	if !host.isPluginFused("panic") {
		t.Fatal("plugin was not fused after panic")
	}
}

func TestRegisteredPluginsIncludesGETManagementMenus(t *testing.T) {
	plugin := &managementPluginDouble{
		routes: []pluginapi.ManagementRoute{
			{
				Method:      http.MethodGet,
				Path:        "/plugins/menu/status",
				Menu:        "Status",
				Description: "Shows plugin status.",
				Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
					return pluginapi.ManagementResponse{}, nil
				}),
			},
			{
				Method: http.MethodGet,
				Path:   "/plugins/menu/hidden",
				Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
					return pluginapi.ManagementResponse{}, nil
				}),
			},
			{
				Method:      http.MethodPost,
				Path:        "/plugins/menu/run",
				Menu:        "Run",
				Description: "Runs a plugin action.",
				Handler: managementHandlerFunc(func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
					return pluginapi.ManagementResponse{}, nil
				}),
			},
		},
	}
	host := newHostWithRecords(capabilityRecord{
		id:     "menu",
		meta:   pluginapi.Metadata{Name: "menu", Version: "1.0.0", Author: "test", GitHubRepository: "https://github.com/router-for-me/CLIProxyAPI"},
		plugin: pluginapi.Plugin{Capabilities: pluginapi.Capabilities{ManagementAPI: plugin}},
	})
	host.RegisterManagementRoutes(context.Background(), nil)

	plugins := host.RegisteredPlugins()
	if len(plugins) != 1 {
		t.Fatalf("RegisteredPlugins() len = %d, want 1", len(plugins))
	}
	if len(plugins[0].Menus) != 1 {
		t.Fatalf("RegisteredPlugins()[0].Menus = %#v, want one visible GET menu", plugins[0].Menus)
	}
	menu := plugins[0].Menus[0]
	if menu.Path != "/v0/management/plugins/menu/status" || menu.Menu != "Status" || menu.Description != "Shows plugin status." {
		t.Fatalf("menu = %#v, want normalized status menu", menu)
	}
}

type managementPluginDouble struct {
	routes []pluginapi.ManagementRoute
}

func (p *managementPluginDouble) RegisterManagement(context.Context, pluginapi.ManagementRegistrationRequest) (pluginapi.ManagementRegistrationResponse, error) {
	return pluginapi.ManagementRegistrationResponse{Routes: p.routes}, nil
}

type managementHandlerFunc func(context.Context, pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error)

func (f managementHandlerFunc) HandleManagement(ctx context.Context, req pluginapi.ManagementRequest) (pluginapi.ManagementResponse, error) {
	return f(ctx, req)
}