package ginext

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

	"git.blackforestbytes.com/BlackForestBytes/goext/langext"
	"github.com/gin-gonic/gin"
)

func TestNewEngine_DefaultsApplied(t *testing.T) {
	w := NewEngine(Options{})
	if w == nil {
		t.Fatalf("expected non-nil wrapper")
	}
	if w.engine == nil {
		t.Fatalf("expected gin engine")
	}
	if w.allowCors {
		t.Fatalf("expected allowCors default false")
	}
	if w.bufferBody {
		t.Fatalf("expected bufferBody default false")
	}
	if !w.ginDebug {
		t.Fatalf("expected ginDebug default true")
	}
	if w.requestTimeout != 24*time.Hour {
		t.Fatalf("expected default 24h timeout, got %s", w.requestTimeout)
	}
}

func TestNewEngine_OptionsHonored(t *testing.T) {
	allowCors := true
	bufferBody := true
	suppress := true
	debug := false
	timeout := 5 * time.Second

	w := NewEngine(Options{
		AllowCors:       &allowCors,
		BufferBody:      &bufferBody,
		SuppressGinLogs: &suppress,
		GinDebug:        &debug,
		Timeout:         &timeout,
		CorsAllowHeader: &[]string{"X-Custom"},
	})

	if !w.allowCors {
		t.Fatalf("allowCors")
	}
	if !w.bufferBody {
		t.Fatalf("bufferBody")
	}
	if !w.suppressGinLogs {
		t.Fatalf("suppressGinLogs")
	}
	if w.ginDebug {
		t.Fatalf("ginDebug should be false")
	}
	if w.requestTimeout != timeout {
		t.Fatalf("timeout mismatch")
	}
	if !langext.ArrEqualsExact(w.corsAllowHeader, []string{"X-Custom"}) {
		t.Fatalf("expected custom allow header")
	}
}

func TestNewEngine_BuildRequestBindError_DefaultIsErrorWrapper(t *testing.T) {
	w := NewEngine(Options{})
	if w.buildRequestBindError == nil {
		t.Fatalf("expected default builder")
	}
	resp := w.buildRequestBindError(nil, "URI", http.ErrAbortHandler)
	if resp == nil {
		t.Fatalf("expected response")
	}
	if resp.IsSuccess() {
		t.Fatalf("expected error response, not success")
	}
}

func TestNewEngine_BuildRequestBindError_Custom(t *testing.T) {
	called := false
	custom := func(c *gin.Context, fieldtype string, err error) HTTPResponse {
		called = true
		return Status(http.StatusTeapot)
	}
	_ = custom // referenced below to avoid unused warning if signature mismatch
	w := NewEngine(Options{BuildRequestBindError: custom})
	resp := w.buildRequestBindError(nil, "URI", http.ErrAbortHandler)
	if !called {
		t.Fatalf("expected custom builder to be invoked")
	}
	if resp.(InspectableHTTPResponse).Statuscode() != http.StatusTeapot {
		t.Fatalf("expected 418 from custom builder")
	}
}

func TestServeHTTP_RoundTrip(t *testing.T) {
	w := NewEngine(Options{})
	w.Routes().GET("/hello").Handle(func(p PreContext) HTTPResponse {
		return Text(http.StatusOK, "world")
	})

	req := httptest.NewRequest(http.MethodGet, "/hello", nil)
	rec := w.ServeHTTP(req)
	if rec.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d", rec.Code)
	}
	if rec.Body.String() != "world" {
		t.Fatalf("expected world, got %q", rec.Body.String())
	}
}

func TestForwardRequest(t *testing.T) {
	w := NewEngine(Options{})
	w.Routes().GET("/fwd").Handle(func(p PreContext) HTTPResponse {
		return Text(http.StatusOK, "ok")
	})

	req := httptest.NewRequest(http.MethodGet, "/fwd", nil)
	rec := httptest.NewRecorder()
	w.ForwardRequest(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d", rec.Code)
	}
}

func TestListRoutes(t *testing.T) {
	w := NewEngine(Options{})
	w.Routes().GET("/a").Handle(func(p PreContext) HTTPResponse { return Status(200) })
	w.Routes().POST("/b").Handle(func(p PreContext) HTTPResponse { return Status(200) })

	rs := w.ListRoutes()
	if len(rs) < 2 {
		t.Fatalf("expected at least 2 routes, got %d", len(rs))
	}
}

func TestDebugPrintRoutes_NoPanic(t *testing.T) {
	w := NewEngine(Options{})
	w.Routes().GET("/x").Handle(func(p PreContext) HTTPResponse { return Status(200) })
	// just verify it doesn't panic
	w.DebugPrintRoutes()
}

func TestCleanMiddlewareName(t *testing.T) {
	w := NewEngine(Options{
		DebugTrimHandlerPrefixes: []string{"customprefix."},
		DebugReplaceHandlerNames: map[string]string{"BadName": "GoodName"},
	})

	cases := []struct {
		in, want string
	}{
		{"ginext.BodyBuffer", "[BodyBuffer]"},
		{"foo.(*GinRoutesWrapper).WithJSONFilter", "[JSONFilter]"},
		{"ginext.someThing", "someThing"},
		{"api.someThing", "someThing"},
		{"customprefix.thing", "thing"},
		{"BadName", "GoodName"},
		{"badname", "GoodName"},
		{"some.pkg.Func.func1", "some.pkg.Func"},
		{"some.pkg.Func.func1.2", "some.pkg.Func"},
	}
	for _, tc := range cases {
		if got := w.cleanMiddlewareName(tc.in); got != tc.want {
			t.Errorf("cleanMiddlewareName(%q) = %q, want %q", tc.in, got, tc.want)
		}
	}
}