package main

import (
	"dmxconnect/hardware"
	"fmt"

	"github.com/rs/zerolog/log"

	"os"
	"path/filepath"
	"time"

	"github.com/wailsapp/wails/v2/pkg/runtime"
	"gopkg.in/yaml.v2"
)

const (
	projectsDirectory = "projects"        // The directory were are stored all the projects
	avatarsDirectory  = "frontend/public" // The directory were are stored all the avatars
	projectExtension  = ".dmxproj"        // The extension of a DMX Connect project
)

// GetProjects gets all the projects in the projects directory
func (a *App) GetProjects() ([]ProjectMetaData, error) {
	projects := []ProjectMetaData{}

	f, err := os.Open(projectsDirectory)
	if err != nil {
		log.Err(err).Str("file", "project").Msg("unable to open the projects directory")
		return nil, fmt.Errorf("unable to open the projects directory: %v", err)
	}
	log.Trace().Str("file", "project").Str("projectsDirectory", projectsDirectory).Msg("projects directory opened")

	files, err := f.Readdir(0)
	if err != nil {
		log.Err(err).Str("file", "project").Msg("unable to read the projects directory")
		return nil, fmt.Errorf("unable to read the projects directory: %v", err)
	}
	log.Trace().Str("file", "project").Any("projectsFiles", files).Msg("project files got")

	for _, fileInfo := range files {
		// Open the file and get the show name
		fileData, err := os.ReadFile(filepath.Join(projectsDirectory, fileInfo.Name()))
		if err != nil {
			log.Warn().Str("file", "project").Str("projectFile", fileInfo.Name()).Msg("unable to open the project file")
			continue
		}
		log.Trace().Str("file", "project").Str("projectFile", fileInfo.Name()).Any("fileData", fileData).Msg("project file read")

		projectObject := ProjectInfo{}
		err = yaml.Unmarshal(fileData, &projectObject)
		if err != nil {
			log.Warn().Str("file", "project").Str("projectFile", fileInfo.Name()).Msg("project has invalid format")
			continue
		}
		log.Trace().Str("file", "project").Str("projectFile", fileInfo.Name()).Msg("project file unmarshalled")

		// Add the SaveFile property
		projects = append(projects, ProjectMetaData{
			Name: projectObject.ShowInfo.Name,
			Save: fileInfo.Name(),
		})
	}
	log.Info().Str("file", "project").Any("projectsList", projects).Msg("got the projects list")
	return projects, nil
}

// CreateProject creates a new blank project
func (a *App) CreateProject() error {

	// Create new project information
	date := time.Now()
	projectInfo := ProjectInfo{
		ShowInfo{
			Name:     "My new show",
			Date:     fmt.Sprintf("%04d-%02d-%02dT%02d:%02d", date.Year(), date.Month(), date.Day(), date.Hour(), date.Minute()),
			Avatar:   "appicon.png",
			Comments: "Write your comments here",
		},
		make(map[string]hardware.PeripheralInfo),
	}

	// The project isn't saved for now
	a.projectSave = ""

	return a.OpenProject(projectInfo)
}

// OpenProjectFromDisk opens a project based on its filename
func (a *App) OpenProjectFromDisk(projectFile string) error {
	// Open the project file
	projectPath := filepath.Join(projectsDirectory, projectFile)
	log.Trace().Str("file", "project").Str("projectPath", projectPath).Msg("project path is created")
	content, err := os.ReadFile(projectPath)
	if err != nil {
		log.Err(err).Str("file", "project").Str("projectFile", projectFile).Msg("Unable to read the project file")
		return fmt.Errorf("unable to read the project file: %v", err)
	}
	log.Trace().Str("file", "project").Str("projectPath", projectPath).Msg("project file read")

	// Import project data structure
	projectInfo := ProjectInfo{}
	err = yaml.Unmarshal(content, &projectInfo)
	if err != nil {
		log.Err(err).Str("file", "project").Str("projectFile", projectFile).Msg("Unable to get the project information")
		return fmt.Errorf("unable to get the project information: %v", err)
	}
	log.Trace().Str("file", "project").Str("projectPath", projectPath).Msg("project information got")

	// The project is saved
	a.projectSave = projectFile

	return a.OpenProject(projectInfo)
}

// OpenProject opens a project based on its information
func (a *App) OpenProject(projectInfo ProjectInfo) error {
	// Close the current project
	err := a.CloseCurrentProject()
	if err != nil {
		return fmt.Errorf("unable to close project: %w", err)
	}

	// Open the project
	a.projectInfo = projectInfo

	// Send an event with the project data
	runtime.EventsEmit(a.ctx, "LOAD_PROJECT", projectInfo.ShowInfo)

	// Load all peripherals of the project
	projectPeripherals := a.projectInfo.PeripheralsInfo
	for key, value := range projectPeripherals {
		hostFinder, err := a.hardwareManager.GetFinder(value.ProtocolName)
		if err != nil {
			return fmt.Errorf("unable to find the finder '%s': %w", value.ProtocolName, err)
		}
		_, err = hostFinder.RegisterPeripheral(a.ctx, value)
		if err != nil {
			return fmt.Errorf("unable to register the peripheral S/N '%s'", key)
		}
	}
	return nil
}

// CloseCurrentProject closes the current project
func (a *App) CloseCurrentProject() error {
	// Unregistrer all peripherals of the project
	projectPeripherals := a.projectInfo.PeripheralsInfo
	for key, value := range projectPeripherals {
		hostFinder, err := a.hardwareManager.GetFinder(value.ProtocolName)
		if err != nil {
			return fmt.Errorf("unable to find the finder '%s': %w", value.ProtocolName, err)
		}
		err = hostFinder.UnregisterPeripheral(a.ctx, value)
		if err != nil {
			return fmt.Errorf("unable to unregister the peripheral S/N '%s': %w", key, err)
		}
	}

	// Unload project info in the front
	return nil
}

// ChooseAvatarPath opens a filedialog to choose the show avatar
func (a *App) ChooseAvatarPath() (string, error) {
	// Open the file dialog box
	filePath, err := runtime.OpenFileDialog(a.ctx, runtime.OpenDialogOptions{
		Title: "Choose your show avatar",
		Filters: []runtime.FileFilter{
			{
				DisplayName: "Images",
				Pattern:     "*.png;*.jpg;*.jpeg",
			},
		},
	})
	if err != nil {
		log.Err(err).Str("file", "project").Msg("unable to open the avatar dialog")
		return "", err
	}
	log.Debug().Str("file", "project").Msg("avatar dialog is opened")
	// Copy the avatar to the application avatars path
	avatarPath := filepath.Join(avatarsDirectory, filepath.Base(filePath))
	log.Trace().Str("file", "project").Str("avatarPath", avatarPath).Msg("avatar path is created")
	_, err = copy(filePath, avatarPath)
	if err != nil {
		log.Err(err).Str("file", "project").Str("avatarsDirectory", avatarsDirectory).Str("fileBase", filepath.Base(filePath)).Msg("unable to copy the avatar file")
		return "", err
	}
	log.Info().Str("file", "project").Str("avatarFileName", filepath.Base(filePath)).Msg("got the new avatar file")
	return filepath.Base(filePath), nil
}

// UpdateShowInfo updates the show information
func (a *App) UpdateShowInfo(showInfo ShowInfo) {
	a.projectInfo.ShowInfo = showInfo
	log.Info().Str("file", "project").Any("showInfo", showInfo).Msg("show information was updated")
}

// SaveProject saves the project
func (a *App) SaveProject() (string, error) {
	// If there is no save file, create a new one with the show name
	if a.projectSave == "" {
		date := time.Now()
		a.projectSave = fmt.Sprintf("%04d%02d%02d%02d%02d%02d%s", date.Year(), date.Month(), date.Day(), date.Hour(), date.Minute(), date.Second(), projectExtension)
		log.Debug().Str("file", "project").Str("newProjectSave", a.projectSave).Msg("projectSave is null, getting a new one")
	}
	data, err := yaml.Marshal(a.projectInfo)
	if err != nil {
		log.Err(err).Str("file", "project").Any("projectInfo", a.projectInfo).Msg("unable to format the project information")
		return "", err
	}
	log.Trace().Str("file", "project").Any("projectInfo", a.projectInfo).Msg("projectInfo has been marshalled")
	// Create the project directory if not exists
	err = os.MkdirAll(projectsDirectory, os.ModePerm)
	if err != nil {
		log.Err(err).Str("file", "project").Str("projectsDirectory", projectsDirectory).Msg("unable to create the projects directory")
		return "", err
	}
	log.Trace().Str("file", "project").Str("projectsDirectory", projectsDirectory).Msg("projects directory has been created")

	err = os.WriteFile(filepath.Join(projectsDirectory, a.projectSave), data, os.ModePerm)
	if err != nil {
		log.Err(err).Str("file", "project").Str("projectsDirectory", projectsDirectory).Str("projectSave", a.projectSave).Msg("unable to save the project")
		return "", err
	}
	log.Info().Str("file", "project").Str("projectFileName", a.projectSave).Msg("project has been saved")
	return a.projectSave, nil
}

// ShowInfo defines the information of the show
type ShowInfo struct {
	Name     string `yaml:"name"`
	Date     string `yaml:"date"`
	Avatar   string `yaml:"avatar"`
	Comments string `yaml:"comments"`
}

// ProjectMetaData defines all the minimum information for a lighting project
type ProjectMetaData struct {
	Name string // Show name
	Save string // The save file of the project
}

// ProjectInfo defines all the information for a lighting project
type ProjectInfo struct {
	ShowInfo        ShowInfo                           `yaml:"show"`        // Show information
	PeripheralsInfo map[string]hardware.PeripheralInfo `yaml:"peripherals"` // Peripherals information
}