// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1

package resource

import (
	"errors"
	"flag"
	"fmt"
	"net/http"
	"strings"

	"github.com/hashicorp/consul/agent/consul"
	"github.com/hashicorp/consul/command/helpers"
	"github.com/hashicorp/consul/command/resource/client"
	"github.com/hashicorp/consul/internal/resourcehcl"
	"github.com/hashicorp/consul/proto-public/pbresource"
)

func ParseResourceFromFile(filePath string) (*pbresource.Resource, error) {
	data, err := helpers.LoadDataSourceNoRaw(filePath, nil)
	if err != nil {
		return nil, fmt.Errorf("Failed to load data: %v", err)
	}
	parsedResource, err := resourcehcl.Unmarshal([]byte(data), consul.NewTypeRegistry())
	if err != nil {
		return nil, fmt.Errorf("Failed to decode resource from input file: %v", err)
	}

	return parsedResource, nil
}

func ParseInputParams(inputArgs []string, flags *flag.FlagSet) error {
	if err := flags.Parse(inputArgs); err != nil {
		if !errors.Is(err, flag.ErrHelp) {
			return fmt.Errorf("Failed to parse args: %v", err)
		}
	}
	return nil
}

func GetTypeAndResourceName(args []string) (gvk *GVK, resourceName string, e error) {
	// it has to be resource name after the type
	if strings.HasPrefix(args[1], "-") {
		return nil, "", fmt.Errorf("Must provide resource name right after type")
	}

	s := strings.Split(args[0], ".")
	if len(s) != 3 {
		return nil, "", fmt.Errorf("Must include resource type argument in group.verion.kind format")
	}

	gvk = &GVK{
		Group:   s[0],
		Version: s[1],
		Kind:    s[2],
	}

	resourceName = args[1]
	return
}

type Resource struct {
	C *client.Client
}

type GVK struct {
	Group   string
	Version string
	Kind    string
}

type WriteRequest struct {
	Metadata map[string]string `json:"metadata"`
	Data     map[string]any    `json:"data"`
	Owner    *pbresource.ID    `json:"owner"`
}

type ListResponse struct {
	Resources []map[string]interface{} `json:"resources"`
}

func (resource *Resource) Read(gvk *GVK, resourceName string, q *client.QueryOptions) (map[string]interface{}, error) {
	r := resource.C.NewRequest("GET", strings.ToLower(fmt.Sprintf("/api/%s/%s/%s/%s", gvk.Group, gvk.Version, gvk.Kind, resourceName)))
	r.SetQueryOptions(q)
	_, resp, err := resource.C.DoRequest(r)
	if err != nil {
		return nil, err
	}
	defer client.CloseResponseBody(resp)
	if err := client.RequireOK(resp); err != nil {
		return nil, err
	}

	var out map[string]interface{}
	if err := client.DecodeBody(resp, &out); err != nil {
		return nil, err
	}

	return out, nil
}

func (resource *Resource) Delete(gvk *GVK, resourceName string, q *client.QueryOptions) error {
	r := resource.C.NewRequest("DELETE", strings.ToLower(fmt.Sprintf("/api/%s/%s/%s/%s", gvk.Group, gvk.Version, gvk.Kind, resourceName)))
	r.SetQueryOptions(q)
	_, resp, err := resource.C.DoRequest(r)
	if err != nil {
		return err
	}
	defer client.CloseResponseBody(resp)
	if err := client.RequireHttpCodes(resp, http.StatusNoContent); err != nil {
		return err
	}
	return nil
}

func (resource *Resource) Apply(gvk *GVK, resourceName string, q *client.QueryOptions, payload *WriteRequest) (*map[string]interface{}, error) {
	url := strings.ToLower(fmt.Sprintf("/api/%s/%s/%s/%s", gvk.Group, gvk.Version, gvk.Kind, resourceName))

	r := resource.C.NewRequest("PUT", url)
	r.SetQueryOptions(q)
	r.Obj = payload
	_, resp, err := resource.C.DoRequest(r)
	if err != nil {
		return nil, err
	}
	defer client.CloseResponseBody(resp)
	if err := client.RequireOK(resp); err != nil {
		return nil, err
	}

	var out map[string]interface{}

	if err := client.DecodeBody(resp, &out); err != nil {
		return nil, err
	}

	return &out, nil
}

func (resource *Resource) List(gvk *GVK, q *client.QueryOptions) (*ListResponse, error) {
	r := resource.C.NewRequest("GET", strings.ToLower(fmt.Sprintf("/api/%s/%s/%s", gvk.Group, gvk.Version, gvk.Kind)))
	r.SetQueryOptions(q)
	_, resp, err := resource.C.DoRequest(r)
	if err != nil {
		return nil, err
	}
	defer client.CloseResponseBody(resp)
	if err := client.RequireOK(resp); err != nil {
		return nil, err
	}

	var out *ListResponse
	if err := client.DecodeBody(resp, &out); err != nil {
		return nil, err
	}

	return out, nil
}