package main

import (
	"encoding/json"
	"fmt"
	"net/url"
	"os"
	"strings"

	"cloud.o-forge.io/core/oc-catalog/models"
	"github.com/sbabiv/xml2map"
	"github.com/tidwall/gjson"
)

type Link struct {
	Src string
	Dst string
}

type Graph struct {
	Links       []Link
	Datas       []models.DataModel
	Computings  []models.ComputingModel
	Datacenters []models.DatacenterModel
	Storages    []models.StorageModel
	ws          HttpQuery
}

func (g *Graph) GetGraphList(apiurl string) (map[string]string, error) {
	g.ws.Init(apiurl)
	body, err := g.ws.Get("v1/workspace/list")
	if err != nil {
		return nil, err
	}
	workspaces := make(map[string]string)
	result := gjson.Get(string(body), "Workflows")
	result.ForEach(func(key, value gjson.Result) bool {
		workspaces[key.Str] = value.String()
		return true // keep iterating
	})
	return workspaces, nil
}

func (g *Graph) LoadFrom(workspace string) error {
	xml := gjson.Get(workspace, "MxgraphXML").String()
	decodedValue, err := url.QueryUnescape(xml)
	if err != nil {
		return err
	}
	os.WriteFile("graph.xml", []byte(decodedValue), 0660)
	decoder := xml2map.NewDecoder(strings.NewReader(decodedValue))
	result, err := decoder.Decode()
	if err != nil {
		return err
	}

	cells := result["mxGraphModel"].(map[string]interface{})["root"].(map[string]interface{})["mxCell"].([]map[string]interface{})
	obj := result["mxGraphModel"].(map[string]interface{})["root"].(map[string]interface{})["object"]
	switch v := obj.(type) {
	case map[string]interface{}:
		cells = append(cells, obj.(map[string]interface{}))
		fmt.Printf("One: %v", v)
	case []map[string]interface{}:
		cells = append(cells, obj.([]map[string]interface{})...)
		fmt.Printf("Many: %v", v)
	}
	dictionnary := make(map[string]string)
	var idlinks []Link
	for _, element := range cells {
		id := element["@id"].(string)
		// Case MXCell
		if _, ok := element["@style"]; ok {
			if _, ok2 := element["@rID"]; ok2 {
				// Resolve elements
				fmt.Print(id + ": ")
				fmt.Println(element["@rID"], element["@rType"])
				fmt.Println(element)
				dictionnary[id] = element["@rID"].(string)
				if element["@rType"] == "data" {
					g.AddDataModel(element["@rID"].(string))
				}
				if element["@rType"] == "datacenter" {
					g.AddDatacenterModel(element["@rID"].(string))
				}
				if element["@rType"] == "computing" {
					g.AddComputingModel(element["@rID"].(string))
				}
				if element["@rType"] == "storage" {
					g.AddStorageModel(element["@rID"].(string))
				}
			}
		} else {
			// Case object
			if _, ok := element["mxCell"]; ok {
				// Attribute values

				// Extracts the cell ids
				element = element["mxCell"].(map[string]interface{})
				if _, ok := element["@style"]; ok {
					if _, ok2 := element["@rID"]; ok2 {
						// Resolve elements
						fmt.Print(id + ": ")
						fmt.Println(element["@rID"], element["@rType"])
						fmt.Println(element)
						dictionnary[id] = element["@rID"].(string)
						if element["@rType"] == "data" {
							g.AddDataModel(element["@rID"].(string))
						}
						if element["@rType"] == "datacenter" {
							g.AddDatacenterModel(element["@rID"].(string))
						}
						if element["@rType"] == "computing" {
							g.AddComputingModel(element["@rID"].(string))
						}
						if element["@rType"] == "storage" {
							g.AddStorageModel(element["@rID"].(string))
						}
					}
				}
			}

		}
		// register links
		if src, ok := element["@source"]; ok {
			//src = element["@source"].(string)
			idlinks = append(idlinks, Link{Src: src.(string), Dst: element["@target"].(string)})
			fmt.Println("Link: " + src.(string) + " " + element["@target"].(string))
		}

	}
	// translate links
	for _, link := range idlinks {
		g.Links = append(g.Links, Link{Src: dictionnary[link.Src], Dst: dictionnary[link.Dst]})
		fmt.Println("Link: " + link.Src + " " + link.Dst + " : " + dictionnary[link.Src] + " " + dictionnary[link.Dst])
	}
	return nil
}

func (g *Graph) AddDataModel(id string) error {
	var d models.DataModel
	resp, err := g.ws.Get("v1/data/" + id)
	if err != nil {
		return err
	}
	json.Unmarshal(resp, &d)
	g.Datas = append(g.Datas, d)
	return nil
}

func (g *Graph) AddDatacenterModel(id string) error {
	var d models.DatacenterModel
	resp, err := g.ws.Get("v1/datacenter/" + id)
	if err != nil {
		return err
	}
	json.Unmarshal(resp, &d)
	g.Datacenters = append(g.Datacenters, d)
	return nil
}

func (g *Graph) AddComputingModel(id string) error {
	var c models.ComputingModel
	resp, err := g.ws.Get("v1/computing/" + id)
	if err != nil {
		return err
	}
	json.Unmarshal(resp, &c)
	g.Computings = append(g.Computings, c)
	return nil
}

func (g *Graph) AddStorageModel(id string) error {
	var s models.StorageModel
	resp, err := g.ws.Get("v1/data/" + id)
	if err != nil {
		return err
	}
	json.Unmarshal(resp, &s)
	g.Storages = append(g.Storages, s)
	return nil
}

func (g *Graph) ExportToArgo(id string) error {
	return nil
}

func (g *Graph) ExportToHelm(id string) error {

	return nil
}