package cli

import (
	"context"
	"errors"
	"fmt"
	"os"

	"git.avsdev.uk/Go/job-search/internal/config"
	"git.avsdev.uk/Go/job-search/internal/store"
)

// ErrNoDatabase is returned by OpenConfiguredStore when database.file isn't
// set.
var ErrNoDatabase = errors.New("database.file is not set")

// OpenConfiguredStore opens the store at database.file, or returns
// ErrNoDatabase if none is configured. A missing file or a database that
// needs migrating fails with a message saying how to create or migrate it; a
// missing file isn't created, as store.Open would. The caller must close the
// store.
func OpenConfiguredStore(
	ctx context.Context, conf *config.JobSearchConfig,
) (*store.Store, error) {
	file := conf.Database.File
	if file == "" {
		return nil, ErrNoDatabase
	}

	_, err := os.Stat(file)
	if errors.Is(err, os.ErrNotExist) {
		return nil, fmt.Errorf(
			"database %s does not exist: run `job-search migrate up --create`",
			file,
		)
	}
	if err != nil {
		return nil, fmt.Errorf("database %s: %w", file, err)
	}

	opportunityStore, err := store.Open(ctx, file)
	if errors.Is(err, store.ErrNeedsMigration) {
		return nil, fmt.Errorf(
			"database %s: %w: run `job-search migrate`", file, err,
		)
	}
	if err != nil {
		return nil, fmt.Errorf("database %s: %w", file, err)
	}

	return opportunityStore, nil
}