// SPDX-FileCopyrightText: 2026 Romain Maneschi <romain@gitroot.dev>
//
// SPDX-License-Identifier: MIT

package model

import (
	"fmt"
	"io/fs"
	"os"
)

type FsBase string

const (
	FS_BASE_WORKTREE   = FsBase("worktree")
	FS_BASE_WEBCONTENT = FsBase("webcontent")
	FS_BASE_CACHE      = FsBase("cache")
)

type GrFs struct {
	base   FsBase
	server ServerNeeded
	fs     fs.FS
}

type ServerNeeded interface {
	WriteContent(fromFs FsBase, filepath, content string) error
	ReplaceContent(fromFs FsBase, filepath string, oldContent string, content string) error
	CopyFile(fromFs FsBase, fromPath string, toFs FsBase, toPath string) error
	DeleteFile(fromFs FsBase, filename string) error
	MoveFile(fromFs FsBase, fromPath string, toFs FsBase, toPath string) error
}

func NewGrFs(base FsBase, server ServerNeeded) *GrFs {
	return &GrFs{
		base:   base,
		server: server,
		fs:     os.DirFS(fmt.Sprintf("/%s", base)),
	}
}

func NewGrFsWithFs(base FsBase, server ServerNeeded, origFs fs.FS) *GrFs {
	return &GrFs{
		base:   base,
		server: server,
		fs:     origFs,
	}
}

// Implements all os.DirFS methods

func (g *GrFs) Open(name string) (fs.File, error) {
	return g.fs.Open(name)
}

func (g *GrFs) ReadFile(name string) ([]byte, error) {
	return fs.ReadFile(g.fs, name)
}

func (g *GrFs) ReadDir(name string) ([]fs.DirEntry, error) {
	return fs.ReadDir(g.fs, name)
}

func (g *GrFs) Stat(name string) (fs.FileInfo, error) {
	return fs.Stat(g.fs, name)
}

func (g *GrFs) Lstat(name string) (fs.FileInfo, error) {
	return fs.Lstat(g.fs, name)
}

func (g *GrFs) ReadLink(name string) (string, error) {
	return fs.ReadLink(g.fs, name)
}

// Personnal methods
func (g *GrFs) WriteContent(filepath, content string) error {
	return g.server.WriteContent(g.base, filepath, content)
}

func (g *GrFs) ReplaceContent(filepath string, oldContent string, content string) error {
	return g.server.ReplaceContent(g.base, filepath, oldContent, content)
}

func (g *GrFs) CopyFile(fromPath string, toPath string) error {
	return g.server.CopyFile(g.base, fromPath, g.base, toPath)
}

func (g *GrFs) CopyFileToFs(fromPath string, toFs *GrFs, toPath string) error {
	return g.server.CopyFile(g.base, fromPath, toFs.base, toPath)
}

func (g *GrFs) DeleteFile(filename string) error {
	return g.server.DeleteFile(g.base, filename)
}

func (g *GrFs) MoveFile(fromPath string, toPath string) error {
	return g.server.MoveFile(g.base, fromPath, g.base, toPath)
}

func (g *GrFs) MoveFileToFs(fromPath string, toFs *GrFs, toPath string) error {
	return g.server.MoveFile(g.base, fromPath, toFs.base, toPath)
}