package config

import (
	"fmt"
	"os"
	"path/filepath"

	"gopkg.in/yaml.v3"
	"videnc-vibe/pkg/types"
)

const (
	appName    = "videnc-vibe"
	configName = "config.yaml"
)

func Load(configPath string) (*types.Config, error) {
	var configFile string

	if configPath != "" {
		configFile = configPath
	} else {
		homeDir, err := os.UserHomeDir()
		if err != nil {
			return nil, fmt.Errorf("getting home directory: %w", err)
		}
		configFile = filepath.Join(homeDir, ".config", appName, configName)
	}

	data, err := os.ReadFile(configFile)
	if err != nil {
		return nil, fmt.Errorf("reading config file %s: %w", configFile, err)
	}

	var cfg types.Config
	if err := yaml.Unmarshal(data, &cfg); err != nil {
		return nil, fmt.Errorf("parsing config file: %w", err)
	}

	if cfg.Paths.Input == "" {
		cfg.Paths.Input = "./input"
	}
	if cfg.Paths.Output == "" {
		cfg.Paths.Output = "./output"
	}
	if cfg.Paths.Originals == "" {
		cfg.Paths.Originals = "./originals"
	}
	if cfg.Paths.Failed == "" {
		cfg.Paths.Failed = "./failed"
	}
	if cfg.Paths.Work == "" {
		cfg.Paths.Work = "./work"
	}
	if cfg.Encoding.DVD.CRF == 0 {
		cfg.Encoding.DVD.CRF = 30
	}
	if cfg.Encoding.DVD.Preset == 0 {
		cfg.Encoding.DVD.Preset = 2
	}
	if cfg.Encoding.Bluray.CRF == 0 {
		cfg.Encoding.Bluray.CRF = 29
	}
	if cfg.Encoding.Bluray.Preset == 0 {
		cfg.Encoding.Bluray.Preset = 3
	}
	if cfg.Encoding.WebDL.CRF == 0 {
		cfg.Encoding.WebDL.CRF = 30
	}
	if cfg.Encoding.WebDL.Preset == 0 {
		cfg.Encoding.WebDL.Preset = 3
	}
	if cfg.Encoding.TVRip.CRF == 0 {
		cfg.Encoding.TVRip.CRF = 32
	}
	if cfg.Encoding.TVRip.Preset == 0 {
		cfg.Encoding.TVRip.Preset = 2
	}

	return &cfg, nil
}

func EnsureDirs(cfg *types.Config) error {
	dirs := []string{cfg.Paths.Input, cfg.Paths.Output, cfg.Paths.Originals, cfg.Paths.Failed, cfg.Paths.Work}
	for _, dir := range dirs {
		if err := os.MkdirAll(dir, 0755); err != nil {
			return fmt.Errorf("creating directory %s: %w", dir, err)
		}
	}
	return nil
}