/*
MIT License

Copyright (c) 2023-2024 The Trzsz SSH Authors.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

package tssh

import (
	"fmt"
	"strings"
)

type promptTheme struct {
	Help            string
	Label           string
	Active          string
	Inactive        string
	Details         string
	Shortcuts       string
	HideLabel       bool
	ItemsRenderer   func(items []interface{}, idx int) string
	DetailsRenderer func(item interface{}) string
}

func getDefaultHelpTipsTemplate() string {
	return fmt.Sprintf(`{{ "Use ← ↓ ↑ → h j k l to navigate, / toggles search, ? toggles help" | %s }}`, getThemeColor("help_tips"))
}

func getDefaultShortcutsTemplate() string {
	return fmt.Sprintf(`{{ . | %s }}`, getThemeColor("shortcuts"))
}

func getDefaultDetailsTemplate() string {
	var builder strings.Builder
	builder.WriteString(fmt.Sprintf(`{{ "--------- SSH Details ----------\n" | %s }}`, getThemeColor("details_title")))
	addItem := func(name string) {
		builder.WriteString(fmt.Sprintf(`{{- if .%s }}{{ "%s:" | %s }}{{ "\t" }}{{ .%s | %s }}{{ "\n" }}{{ end }}`,
			name, name, getThemeColor("details_name"), name, getThemeColor("details_value")))
	}
	for _, item := range getPromptDetailItems() {
		switch strings.ToLower(item) {
		case "alias":
			addItem("Alias")
		case "host":
			addItem("Host")
		case "port":
			builder.WriteString(fmt.Sprintf(
				`{{- if ne .Port "22" }}{{ "Port:" | %s }}{{ "\t" }}{{ .Port | %s }}{{ "\n" }}{{ end }}`,
				getThemeColor("details_name"), getThemeColor("details_value")))
		case "user":
			addItem("User")
		case "grouplabels":
			addItem("GroupLabels")
		case "identityfile":
			addItem("IdentityFile")
		case "proxycommand":
			addItem("ProxyCommand")
		case "proxyjump":
			addItem("ProxyJump")
		case "remotecommand":
			addItem("RemoteCommand")
		default:
			warning("Unknown prompt detail item: %s", item)
		}
	}
	return builder.String()
}

func getTinyTheme() *promptTheme {
	return &promptTheme{
		Label: fmt.Sprintf(`{{ "? " | %s }}{{ . | %s }}{{ ":" | %s }}`,
			getThemeColor("label_icon"), getThemeColor("label_text"), getThemeColor("label_text")),
		Active: fmt.Sprintf(`{{ "%s" | %s }} {{ if .Selected }}{{ "✔ " | %s }}{{ else }}{{ "  " }}{{ end }}`+
			`{{ .Alias | %s }} ({{ .Host | %s }}){{ "\t" }}{{ .GroupLabels | %s }}`,
			promptCursorIcon, getThemeColor("cursor_icon"), getThemeColor("active_selected"),
			getThemeColor("active_alias"), getThemeColor("active_host"), getThemeColor("active_group")),
		Inactive: fmt.Sprintf(`   {{ if .Selected }}{{ "✔ " | %s }}{{ else }}{{ "  " }}{{ end }}`+
			`{{ .Alias | %s }} ({{ .Host | %s }}){{ "\t" }}{{ .GroupLabels | %s }}`,
			getThemeColor("inactive_selected"),
			getThemeColor("inactive_alias"), getThemeColor("inactive_host"), getThemeColor("inactive_group")),
		Details:   getDefaultDetailsTemplate(),
		Help:      getDefaultHelpTipsTemplate(),
		Shortcuts: getDefaultShortcutsTemplate(),
	}
}

func getPromptTheme() *promptTheme {
	return getTinyTheme()
}