package api

import (
	"fmt"
	"net/http"
	"regexp"
	"sort"
	"strings"

	"github.com/labstack/echo/v4"
	"gitnet.fr/deblan/mu-go/fs"
)

type ApiError struct {
	Error string `json:"error"`
}

func List(e echo.Context, directory, url string) error {
	files, err := fs.Files(directory, url)
	if err != nil {
		return e.JSON(http.StatusInternalServerError, ApiError{Error: fmt.Sprintf("%s", err)})
	}

	name := e.QueryParam("name")
	order := e.QueryParam("order")

	if name != "" {
		name = strings.ToLower(name)
		var newFiles []fs.File

		for _, file := range files {
			isMatchingName, _ := regexp.MatchString(name, strings.ToLower(file.Name))

			if isMatchingName {
				newFiles = append(newFiles, file)
			}
		}

		files = newFiles
	}

	sort.SliceStable(files, func(i, j int) bool {
		if order == "date" {
			return files[i].Date < files[j].Date
		} else if order == "name" {
			return files[i].Name < files[j].Name
		}

		return false
	})

	return e.JSONPretty(http.StatusOK, files, "  ")
}

func Stream(e echo.Context, directory, url string) error {
	files, err := fs.Files(directory, url)
	path := e.QueryParam("path")

	if err != nil {
		return e.JSON(http.StatusInternalServerError, ApiError{Error: fmt.Sprintf("%s", err)})
	}

	if path == "" {
		return e.JSON(http.StatusBadRequest, ApiError{Error: "\"path\" query param is missing"})
	}

	for _, file := range files {
		if file.RelativePath == path {
			e.Response().Header().Del("Content-Length")
			http.ServeFile(e.Response(), e.Request(), file.Path)
		}
	}

	return e.JSON(http.StatusNotFound, ApiError{Error: "file not found"})
}