package view

import (
	"embed"
	"encoding/json"
	"fmt"
	"strings"

	"github.com/a-h/templ"
	"github.com/labstack/echo/v4"
)

var (
	//go:embed static/*
	statics     embed.FS
	manifest    map[string]string
	entrypoints map[string]map[string]map[string][]string
)

func Render(ctx echo.Context, statusCode int, t templ.Component) error {
	buf := templ.GetBuffer()
	defer templ.ReleaseBuffer(buf)

	if err := t.Render(ctx.Request().Context(), buf); err != nil {
		return err
	}

	return ctx.HTML(statusCode, buf.String())
}

func Asset(name string) string {
	if manifest == nil {
		value, _ := statics.ReadFile("static/manifest.json")
		json.Unmarshal(value, &manifest)
	}

	path, ok := manifest[name]

	if !ok {
		return ""
	}

	return path
}

func entrypointFiles(app, category string) []string {
	if entrypoints == nil {
		value, _ := statics.ReadFile("static/entrypoints.json")
		json.Unmarshal(value, &entrypoints)
	}

	entry, ok := entrypoints["entrypoints"][app]

	if !ok {
		return []string{}
	}

	files, ok := entry[category]

	if !ok {
		return []string{}
	}

	return files
}

func EntrypointJs(app string) string {
	files := entrypointFiles(app, "js")
	results := []string{}

	for _, file := range files {
		results = append(results, fmt.Sprintf(`<script src="%s"></script>`, file))
	}

	return strings.Join(results, "")
}

func EntrypointCss(app string) string {
	files := entrypointFiles(app, "css")
	results := []string{}

	for _, file := range files {
		results = append(results, fmt.Sprintf(`<link rel="stylesheet" href="%s" />`, file))
	}

	return strings.Join(results, "")
}