package main

import (
	"context"
	"os"
	"sync"
	"time"
)

const (
	tarGzSuffix           = ".tar.gz"
	defaultListen         = "127.0.0.1:18080"
	defaultInterval       = 15 * time.Second
	defaultStableFor      = 30 * time.Second
	maxLogLines           = 200
	settingsFileName      = "unc-file-watcher-settings.json"
	genericDedupeNameSize = "name_size"
	genericDedupeNameHash = "name_hash"
)

type archiveRule struct {
	enabled   bool
	sourceDir string
	zipDir    string
	unzipDir  string
}

type genericRule struct {
	enabled    bool
	sourceDir  string
	targetDir  string
	extensions []string
	dedupeMode string
}

type config struct {
	interval    time.Duration
	stableFor   time.Duration
	stableScans int
	mode        string
	recursive   bool
	archive     archiveRule
	generic     genericRule
}

type fileSnapshot struct {
	size    int64
	modTime time.Time
}

type fileState struct {
	lastObserved fileSnapshot
	stableCount  int
	handledKey   string
	lastDecision string
}

type candidate struct {
	path string
	info os.FileInfo
}

type formValues struct {
	ArchiveEnabled   bool   `json:"archive_enabled"`
	ArchiveSourceDir string `json:"archive_source_dir"`
	ArchiveZipDir    string `json:"archive_zip_dir"`
	ArchiveUnzipDir  string `json:"archive_unzip_dir"`
	GenericEnabled   bool   `json:"generic_enabled"`
	GenericSourceDir string `json:"generic_source_dir"`
	GenericTargetDir string `json:"generic_target_dir"`
	GenericExts      string `json:"generic_exts"`
	GenericDedupe    string `json:"generic_dedupe"`
	Interval         string `json:"interval"`
	StableFor        string `json:"stable_for"`
	StableScans      string `json:"stable_scans"`
	Mode             string `json:"mode"`
	Recursive        bool   `json:"recursive"`
}

type legacyFormValues struct {
	SourceDir   string `json:"source_dir"`
	ZipDir      string `json:"zip_dir"`
	UnzipDir    string `json:"unzip_dir"`
	Interval    string `json:"interval"`
	StableFor   string `json:"stable_for"`
	StableScans string `json:"stable_scans"`
	Mode        string `json:"mode"`
	Recursive   bool   `json:"recursive"`
}

type pageData struct {
	Running       bool
	StartedAt     string
	LastMessage   string
	LastError     string
	SubmitMessage string
	SubmitError   string
	SettingsPath  string
	Form          formValues
	Logs          []string
}

type app struct {
	mu           sync.RWMutex
	cancel       context.CancelFunc
	runID        int64
	running      bool
	startedAt    time.Time
	lastMessage  string
	lastError    string
	cfg          config
	form         formValues
	logs         []string
	settingsPath string
}

type processFunc func(string) (string, bool, error)