/*
 Copyright 2022 The KubeVela Authors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 	http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
*/

package mods

import (
	"context"
	"fmt"
	"os"
	"strings"
	"time"

	"github.com/kubevela/pkg/util/singleton"

	"github.com/oam-dev/kubevela/apis/types"
	"github.com/oam-dev/kubevela/pkg/utils/common"
	"github.com/oam-dev/kubevela/references/docgen"
)

const (
	// PolicyDefRefPath is the target path for kubevela.io policy ref docs
	PolicyDefRefPath = "../kubevela.io/docs/end-user/policies/references.md"
	// PolicyDefRefPathZh is the target path for kubevela.io policy ref docs in Chinese
	PolicyDefRefPathZh = "../kubevela.io/i18n/zh/docusaurus-plugin-content-docs/current/end-user/policies/references.md"
)

// PolicyDefDirs store inner CUE definition
var PolicyDefDirs = []string{"./vela-templates/definitions/internal/policy/"}

// CustomPolicyHeaderEN .
var CustomPolicyHeaderEN = `---
title: Built-in Policy Type
---

This documentation will walk through all the built-in policy types sorted alphabetically.

` + fmt.Sprintf("> It was generated automatically by [scripts](../../contributor/cli-ref-doc), please don't update manually, last updated at %s.\n\n", time.Now().Format(time.RFC3339))

// CustomPolicyHeaderZH .
var CustomPolicyHeaderZH = `---
title: 内置策略列表
---

本文档将**按字典序**展示所有内置策略的参数列表。

` + fmt.Sprintf("> 本文档由[脚本](../../contributor/cli-ref-doc)自动生成，请勿手动修改，上次更新于 %s。\n\n", time.Now().Format(time.RFC3339))

// PolicyDef generate policy def reference doc
func PolicyDef(ctx context.Context, c common.Args, opt Options) {
	if len(opt.DefDirs) == 0 {
		opt.DefDirs = PolicyDefDirs
	}
	ref := &docgen.MarkdownReference{
		AllInOne:     true,
		ForceExample: opt.ForceExamples,
		Filter: func(capability types.Capability) bool {
			if capability.Type != types.TypePolicy || capability.Category != types.CUECategory {
				return false
			}
			if capability.Labels != nil && (capability.Labels[types.LabelDefinitionHidden] == "true" || capability.Labels[types.LabelDefinitionDeprecated] == "true") {
				return false
			}
			// only print capability which contained in cue def
			for _, dir := range opt.DefDirs {
				files, err := os.ReadDir(dir)
				if err != nil {
					fmt.Println("read dir err", opt.DefDirs, err)
					return false
				}
				for _, f := range files {
					if strings.Contains(f.Name(), capability.Name) {
						return true
					}
				}
			}
			return false
		},
		CustomDocHeader: CustomPolicyHeaderEN,
	}
	ref.Local = &docgen.FromLocal{Paths: PolicyDefDirs}
	ref.Client = singleton.KubeClient.Get()

	if opt.Path != "" {
		ref.I18N = &docgen.En
		if strings.Contains(opt.Location, "zh") || strings.Contains(opt.Location, "chinese") {
			ref.I18N = &docgen.Zh
			ref.CustomDocHeader = CustomPolicyHeaderZH
		}
		if err := ref.GenerateReferenceDocs(ctx, c, opt.Path); err != nil {
			fmt.Println(err)
			os.Exit(1)
		}
		fmt.Printf("policy reference docs (%s) successfully generated in %s \n", ref.I18N.Language(), opt.Path)
		return
	}
	if opt.Location == "" || opt.Location == "en" {
		ref.I18N = &docgen.En
		if err := ref.GenerateReferenceDocs(ctx, c, PolicyDefRefPath); err != nil {
			fmt.Println(err)
			os.Exit(1)
		}
		fmt.Printf("policy reference docs (%s) successfully generated in %s \n", ref.I18N.Language(), PolicyDefRefPath)
	}
	if opt.Location == "" || opt.Location == "zh" {
		ref.I18N = &docgen.Zh
		ref.CustomDocHeader = CustomPolicyHeaderZH
		if err := ref.GenerateReferenceDocs(ctx, c, PolicyDefRefPathZh); err != nil {
			fmt.Println(err)
			os.Exit(1)
		}
		fmt.Printf("policy reference docs (%s) successfully generated in %s \n", ref.I18N.Language(), PolicyDefRefPathZh)
	}
}
