// codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/interface/http/blockedemail/delete.go
package blockedemail

import (
	"encoding/json"
	"net/http"
	"net/url"

	"go.uber.org/zap"

	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/config"
	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/interface/http/middleware"
	svc_blockedemail "codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/service/blockedemail"
	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/pkg/httperror"
	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/pkg/validation"
)

type DeleteBlockedEmailHTTPHandler struct {
	config     *config.Configuration
	logger     *zap.Logger
	service    svc_blockedemail.DeleteBlockedEmailService
	middleware middleware.Middleware
}

func NewDeleteBlockedEmailHTTPHandler(
	config *config.Configuration,
	logger *zap.Logger,
	service svc_blockedemail.DeleteBlockedEmailService,
	middleware middleware.Middleware,
) *DeleteBlockedEmailHTTPHandler {
	logger = logger.Named("DeleteBlockedEmailHTTPHandler")
	return &DeleteBlockedEmailHTTPHandler{
		config:     config,
		logger:     logger,
		service:    service,
		middleware: middleware,
	}
}

func (*DeleteBlockedEmailHTTPHandler) Pattern() string {
	return "DELETE /api/v1/me/blocked-emails/{email}"
}

func (h *DeleteBlockedEmailHTTPHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	h.middleware.Attach(h.Execute)(w, req)
}

func (h *DeleteBlockedEmailHTTPHandler) Execute(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")

	ctx := r.Context()

	// Extract email from URL path
	emailEncoded := r.PathValue("email")
	if emailEncoded == "" {
		httperror.RespondWithError(w, r, httperror.NewBadRequestError("Email is required"))
		return
	}

	// URL decode the email using PathUnescape (not QueryUnescape)
	// PathUnescape correctly handles %2B as + instead of treating + as space
	email, err := url.PathUnescape(emailEncoded)
	if err != nil {
		h.logger.Error("failed to decode email",
			zap.String("encoded_email", validation.MaskEmail(emailEncoded)),
			zap.Any("error", err))
		httperror.RespondWithError(w, r, httperror.NewBadRequestError("Invalid email format"))
		return
	}

	h.logger.Debug("decoded email from path",
		zap.String("encoded", validation.MaskEmail(emailEncoded)),
		zap.String("decoded", validation.MaskEmail(email)))

	resp, err := h.service.Execute(ctx, email)
	if err != nil {
		httperror.RespondWithError(w, r, err)
		return
	}

	if err := json.NewEncoder(w).Encode(resp); err != nil {
		h.logger.Error("failed to encode response",
			zap.Any("error", err))
		httperror.RespondWithError(w, r, err)
		return
	}
}