package protocol

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

	"github.com/stretchr/testify/assert"
)

func TestHTTPError_Error(t *testing.T) {
	err := HTTPError{StatusCode: 400, Body: "bad request"}
	assert.Equal(t, "bad request", err.Error())
}

func TestHTTPProtocol_BadRequest(t *testing.T) {
	hp := HTTPProtocol{}
	err := hp.BadRequest("bad req")
	assert.Equal(t, http.StatusBadRequest, err.StatusCode)
	assert.Equal(t, "bad req", err.Body)
}

func TestHTTPProtocol_UnprocessableEntity(t *testing.T) {
	hp := HTTPProtocol{}
	err := hp.UnprocessableEntity("")
	assert.Equal(t, http.StatusUnprocessableEntity, err.StatusCode)
	assert.Equal(t, "Unprocessable Entity", err.Body)
	err2 := hp.UnprocessableEntity("custom")
	assert.Equal(t, "custom", err2.Body)
}

func TestHTTPProtocol_InternalServerError(t *testing.T) {
	hp := HTTPProtocol{}
	err := hp.InternalServerError("")
	assert.Equal(t, http.StatusInternalServerError, err.StatusCode)
	assert.Equal(t, "Internal Server Error", err.Body)
	err2 := hp.InternalServerError("custom")
	assert.Equal(t, "custom", err2.Body)
}

func TestHTTPProtocol_NotImplemented(t *testing.T) {
	hp := HTTPProtocol{}
	err := hp.NotImplemented("")
	assert.Equal(t, http.StatusNotImplemented, err.StatusCode)
	assert.Equal(t, "Not Implemented", err.Body)
	err2 := hp.NotImplemented("custom")
	assert.Equal(t, "custom", err2.Body)
}

func TestHTTPProtocol_Forbidden(t *testing.T) {
	hp := HTTPProtocol{}
	err := hp.Forbidden("")
	assert.Equal(t, http.StatusForbidden, err.StatusCode)
	assert.Equal(t, "Forbidden", err.Body)
	err2 := hp.Forbidden("custom")
	assert.Equal(t, "custom", err2.Body)
}

func TestHTTPProtocol_NotFound(t *testing.T) {
	hp := HTTPProtocol{}
	err := hp.NotFound()
	assert.Equal(t, http.StatusNotFound, err.StatusCode)
	assert.Equal(t, "Not Found", err.Body)
}

func TestHTTPProtocol_ToResponse(t *testing.T) {
	hp := HTTPProtocol{}
	resp := hp.ToResponse("data", nil)
	assert.Equal(t, http.StatusOK, resp.Code)
	assert.Equal(t, "data", resp.Data)
	resp2 := hp.ToResponse("data", errors.New("fail"))
	assert.Equal(t, http.StatusInternalServerError, resp2.Code)
	assert.Equal(t, "fail", resp2.Message)
}

func TestHTTPProtocol_WriteRawOK(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteRawOK(rw)
	assert.Equal(t, http.StatusOK, rw.Code)
	assert.Equal(t, "application/json", rw.Header().Get("Content-Type"))
	assert.Equal(t, "0", rw.Header().Get("Content-Length"))
}

func TestHTTPProtocol_WriteRawNoContent(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteRawNoContent(rw)
	assert.Equal(t, http.StatusNoContent, rw.Code)
	assert.Equal(t, "application/json", rw.Header().Get("Content-Type"))
}

func TestHTTPProtocol_WriteJSONData(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteJSONData(rw, map[string]string{"foo": "bar"})
	assert.Equal(t, http.StatusOK, rw.Code)
	assert.Contains(t, rw.Body.String(), "foo")
}

func TestHTTPProtocol_WriteRawError(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteRawError(rw, http.StatusBadRequest, "bad")
	assert.Equal(t, http.StatusBadRequest, rw.Code)
	assert.Equal(t, "text/plain; charset=utf-8", rw.Header().Get("Content-Type"))
	assert.Contains(t, rw.Body.String(), "bad")
}

func TestHTTPProtocol_WriteEncodedError(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteEncodedError(rw, http.StatusBadRequest, map[string]string{"err": "bad"})
	assert.Equal(t, http.StatusBadRequest, rw.Code)
	assert.Contains(t, rw.Body.String(), "bad")
}

func TestHTTPProtocol_WriteData(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteData(rw, map[string]string{"foo": "bar"})
	assert.Equal(t, http.StatusOK, rw.Code)
	assert.Contains(t, rw.Body.String(), "foo")
}

func TestHTTPProtocol_WriteDataWithWarning(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteDataWithWarning(rw, map[string]string{"foo": "bar"}, "warn")
	assert.Equal(t, http.StatusOK, rw.Code)
	assert.Contains(t, rw.Body.String(), "warn")
}

func TestHTTPProtocol_WriteDataWithMessage(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteDataWithMessage(rw, map[string]string{"foo": "bar"}, "msg")
	assert.Equal(t, http.StatusOK, rw.Code)
	assert.Contains(t, rw.Body.String(), "msg")
}

func TestHTTPProtocol_WriteDataWithMessageAndWarning(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteDataWithMessageAndWarning(rw, map[string]string{"foo": "bar"}, "msg", "warn")
	assert.Equal(t, http.StatusOK, rw.Code)
	assert.Contains(t, rw.Body.String(), "msg")
	assert.Contains(t, rw.Body.String(), "warn")
}

func TestHTTPProtocol_WriteError(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	hp.WriteError(rw, HTTPError{StatusCode: 400, Body: "fail"})
	assert.Equal(t, 400, rw.Code)
	body := rw.Body.String()
	log.Println("body: " + body)
	assert.Contains(t, body, "fail")
}

func TestHTTPProtocol_WriteResponse(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	resp := &HTTPResponse{Code: 200, Data: "foo"}
	hp.WriteResponse(rw, resp)
	assert.Equal(t, 200, rw.Code)
	assert.Contains(t, rw.Body.String(), "foo")
}

func TestHTTPProtocol_WriteData_Structure(t *testing.T) {
	hp := HTTPProtocol{}
	rw := httptest.NewRecorder()
	data := map[string]string{"foo": "bar"}
	hp.WriteData(rw, data)
	assert.Equal(t, http.StatusOK, rw.Code)
	assert.Equal(t, "application/json", rw.Header().Get("Content-Type"))

	// Check the structure of the JSON response
	body := rw.Body.String()
	assert.Contains(t, body, "\"code\":200")
	assert.Contains(t, body, "\"data\":{\"foo\":\"bar\"}")
	assert.NotContains(t, body, "message")
	assert.NotContains(t, body, "warning")
}

func TestHTTPProtocol_HTTPResponse(t *testing.T) {
	proto := HTTP()

	// Test data, meta, warning, message
	data := struct {
		Apples  int
		Bananas int
	}{
		Apples:  12,
		Bananas: 4,
	}

	meta := map[string]interface{}{
		"lastUpdated": time.Date(2025, time.September, 5, 13, 27, 3, 0, time.UTC),
	}

	warning := "warning"

	message := "message"

	// Test building an HTTPResponse

	var r *HTTPResponse

	r = proto.NewResponse()
	if r == nil || r.Code != 200 {
		t.Errorf("expected code %d, received %d", 200, r.Code)
	}

	r = proto.NewResponse(302).WithMessage("Moved Temporarily")
	if r == nil || r.Code != 302 || r.Message != "Moved Temporarily" {
		t.Errorf("expected %d %s, received %d %s", 302, "Moved Temporarily", r.Code, r.Message)
	}

	r = r.WithCode(200).WithData(data).WithMeta(meta).WithMessage(message).WithWarning(warning)
	if r == nil {
		t.Errorf("unexpected nil response")
	}
	if r.Code != 200 {
		t.Errorf("expected code %d, received %d", 200, r.Code)
	}
	if r.Data == nil {
		t.Error("unexpected nil data")
	}
	if r.Meta == nil {
		t.Error("unexpected nil meta")
	}
	if r.Message == "" {
		t.Error("unexpected empty message")
	}
	if r.Warning == "" {
		t.Error("unexpected empty warning")
	}

	// Test assigning attribtues to nil response

	r = nil
	r = r.WithCode(413)
	if r == nil || r.Code != 413 {
		t.Errorf("expected code %d, received %d", 413, r.Code)
	}

	r = nil
	r = r.WithData(data)
	if r == nil || r.Data == nil {
		t.Error("expected data, received nil")
	}

	r = nil
	r = r.WithMeta(meta)
	if r == nil || r.Meta == nil {
		t.Error("expected meta, received nil")
	}

	r = nil
	r = r.WithWarning(warning)
	if r == nil || r.Warning == "" {
		t.Error("expected warning, received empty string")
	}

	r = nil
	r = r.WithMessage(message)
	if r == nil || r.Message == "" {
		t.Error("expected message, received empty string")
	}
}

func TestHTTPProtocol_NewError(t *testing.T) {
	proto := HTTP()

	err := errors.New("error")

	httpErr := proto.NewError(err)
	if httpErr == nil || httpErr.StatusCode != 500 || httpErr.Body != "error" {
		t.Errorf("expected 500 error, received %d %s", httpErr.StatusCode, httpErr.Body)
	}

	httpErr = proto.NewError(err, 400)
	if httpErr == nil || httpErr.StatusCode != 400 || httpErr.Body != "error" {
		t.Errorf("expected 400 error, received %d %s", httpErr.StatusCode, httpErr.Body)
	}

	httpErr = proto.NewError(err, 400, 404)
	if httpErr == nil || httpErr.StatusCode != 400 || httpErr.Body != "error" {
		t.Errorf("expected 400 error, received %d %s", httpErr.StatusCode, httpErr.Body)
	}
}