package main

import (
	"bufio"
	"fmt"
	"log"
	"sort"
	"strings"

	"forgejo.edf-bootstrap.cx.fg1.ffm.osc.live/richardrobertreitz/docudile/lib"
)

type field struct {
	name        string
	kind        string
	description []string
}

type spec struct {
	uuid        string
	group       string
	kind        string
	version     string
	field       []string
	description []string
	fields      []field
}

type index struct {
	name    string
	version string
	key     string
	uuid    string
}

func getFields(state *int, line string) {
	*state++
}

func getSpec(specs map[string]spec, specName string) {
	spec := spec{}
	spec.uuid = specName

	out, err := lib.ExecNotFatal(`#!/bin/bash
	kubectl explain "${SPEC}"
	`, []string{"SPEC=" + specName})

	if err != nil {
		if specName == "events.events.k8s.io" {
			fmt.Println("warning: skipped " + specName + " intentionally, seems substituted by events")
			return
		} else {
			log.Fatal("warning, cant lookup "+specName+": ", err)
		}
	}

	currentField := field{}
	fieldsState := 0

	scanner := bufio.NewScanner(strings.NewReader(out))
	step := 0
	for scanner.Scan() {
		line := scanner.Text()
		if step == 0 {
			if strings.HasPrefix(line, "GROUP:") {
				word := line[6:]
				spec.group = strings.Join(strings.Fields(word), " ")
			} else if strings.HasPrefix(line, "KIND:") {
				word := line[5:]
				spec.kind = strings.Join(strings.Fields(word), " ")
				step++
			}
			step++
		} else if step == 1 {
			if strings.HasPrefix(line, "KIND:") {
				word := line[5:]
				spec.kind = strings.Join(strings.Fields(word), " ")
				step++
			} else {
				log.Fatal("cant find kind type")
			}
		} else if step == 2 {
			if strings.HasPrefix(line, "VERSION:") {
				word := line[8:]
				spec.version = strings.Join(strings.Fields(word), " ")
				step++
			} else {
				log.Fatal("cant find kind type")
			}
		} else if step == 3 {
			if len(strings.TrimSpace(line)) == 0 {
				step++
			} else {
				log.Fatal("cant find new line")
			}
		} else if step == 5 {
			if len(strings.TrimSpace(line)) == 0 {
				step = 3
			} else {
				log.Fatal("cant find new line")
			}
		} else if step == 4 {
			if strings.HasPrefix(line, "FIELD:") {
				word := line[6:]
				spec.field = strings.Fields(word)
				step = 5
			} else if strings.HasPrefix(line, "DESCRIPTION:") {
				step = 6
			} else {
				log.Fatal("cant find field or description type")
			}
		} else if step == 6 {
			if !strings.HasPrefix(line, "FIELDS:") {
				if len(line) != 0 {
					spec.description = append(spec.description, strings.TrimSpace(line))
				}
			} else {
				step++
			}
		} else if step == 7 {
			currentField = field{}
			field.name = strings.TrimSpace(line)
			spec.fields = append(spec.fields, field)
			getFields(&fieldsState, &spec.fieldsstrings.TrimSpace(line))
		}
	}

	fmt.Println("fs " + fmt.Sprint(fieldsState))

	if err := scanner.Err(); err != nil {
		log.Fatal("error: ", err)
	}

	if len(spec.field) != 2 && len(spec.field) != 0 {
		log.Fatal("type field should contain 2 or 0 elements, found " + fmt.Sprint(len(spec.field)))
	}

	if len(spec.description) > 0 {
		if len(strings.TrimSpace(spec.description[len(spec.description)-1])) == 0 {
			spec.description = spec.description[:len(spec.description)-1]
		}
	}

	specs[specName] = spec
}

func main() {
	out, err := lib.ExecNotFatal(`#!/bin/bash
	kubectl api-resources --verbs=list -o name | sort
	`, []string{})

	if err != nil {
		log.Fatal("error: ", err)
	}

	specs := make(map[string]spec)

	scanner := bufio.NewScanner(strings.NewReader(out))
	for scanner.Scan() {
		getSpec(specs, scanner.Text())
	}
	getSpec(specs, "edfbuilders.edfbuilder.crossplane.io")

	if err := scanner.Err(); err != nil {
		log.Fatal("error: ", err)
	}

	for name, spec := range specs {
		fmt.Println("### uuid = " + name)
		fmt.Println("group = '" + spec.group + "'")
		fmt.Println("kind = '" + spec.kind + "'")
		fmt.Println("version = '" + spec.version + "'")
		fmt.Println("field[" + fmt.Sprint(len(spec.field)) + "]:")
		for i := 0; i < len(spec.field); i++ {
			fmt.Println("  " + spec.field[i])
		}
		fmt.Println("description[" + fmt.Sprint(len(spec.description)) + "]:")
		for i := 0; i < len(spec.description); i++ {
			fmt.Println("  " + spec.description[i])
		}
		fmt.Println("fields[" + fmt.Sprint(len(spec.fields)) + "]:")
		for i := 0; i < len(spec.fields); i++ {
			fmt.Println("  " + spec.fields[i].name)
		}
	}

	objects := []index{}

	for name, spec := range specs {
		objects = append(objects, index{spec.kind, spec.version, name, spec.uuid})
	}

	sort.SliceStable(objects, func(i, j int) bool {
		if objects[i].name == objects[j].name && objects[i].key == objects[j].key {
			return objects[i].version < objects[j].version
		} else if objects[i].name == objects[j].name {
			return objects[i].key < objects[j].key
		} else {
			return objects[i].name < objects[j].name
		}
	})

	/*for _, object := range objects {
		fmt.Println(object.name + " " + object.version + "." + object.key + " " + object.uuid)
	}*/
}