package main

import (
	"bufio"
	"context"
	"log/slog"
	"os"
	"strings"

	"shared-album/internal/config"
	"shared-album/internal/db"
	"shared-album/internal/photos"
	"shared-album/internal/storage"
)

func main() {
	loadDotEnv(".env")
	loadDotEnv("../.env")

	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: slog.LevelInfo}))
	slog.SetDefault(logger)

	cfg, err := config.Load()
	if err != nil {
		slog.Error("config error", "error", err)
		os.Exit(1)
	}

	ctx := context.Background()

	pool, err := db.Connect(ctx, cfg.Postgres.DSN())
	if err != nil {
		slog.Error("database connect failed", "error", err)
		os.Exit(1)
	}
	defer pool.Close()

	store, err := storage.Open(ctx, cfg)
	if err != nil {
		slog.Error("storage init failed", "error", err)
		os.Exit(1)
	}

	photoStore := photos.NewStore(pool)
	updated, err := photoStore.BackfillEXIF(ctx, store.Get)
	if err != nil {
		slog.Error("backfill failed", "error", err)
		os.Exit(1)
	}
	slog.Info("exif backfill complete", "updated", updated)
}

func loadDotEnv(path string) {
	f, err := os.Open(path)
	if err != nil {
		return
	}
	defer f.Close()
	scanner := bufio.NewScanner(f)
	for scanner.Scan() {
		line := strings.TrimSpace(scanner.Text())
		if line == "" || strings.HasPrefix(line, "#") {
			continue
		}
		key, value, ok := strings.Cut(line, "=")
		if !ok {
			continue
		}
		key = strings.TrimSpace(key)
		value = strings.TrimSpace(value)
		if _, exists := os.LookupEnv(key); !exists {
			_ = os.Setenv(key, value)
		}
	}
}