package tenant

import (
	"context"
	"database/sql"
	"time"

	"github.com/google/uuid"
)

func (q *Queries) ListAssets(ctx context.Context) ([]Asset, error) {
	rows, err := q.db.QueryContext(ctx, `SELECT id, filename, r2_key, content_type, size, width, height, created_at
		FROM assets ORDER BY created_at DESC`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var assets []Asset
	for rows.Next() {
		a, err := scanAsset(rows)
		if err != nil {
			return nil, err
		}
		assets = append(assets, a)
	}
	return assets, rows.Err()
}

func (q *Queries) GetAsset(ctx context.Context, id string) (*Asset, error) {
	row := q.db.QueryRowContext(ctx, `SELECT id, filename, r2_key, content_type, size, width, height, created_at
		FROM assets WHERE id = ?`, id)

	a, err := scanAsset(row)
	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}
	return &a, nil
}

func (q *Queries) CreateAsset(ctx context.Context, a *Asset) error {
	if a.ID == "" {
		a.ID = uuid.NewString()
	}
	now := time.Now().UTC().Format(time.RFC3339)
	_, err := q.db.ExecContext(ctx, `INSERT INTO assets (id, filename, r2_key, content_type, size, width, height, created_at)
		VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
		a.ID, a.Filename, a.R2Key, nullStr(a.ContentType), nullInt64(a.Size), nullInt64(int64(a.Width)), nullInt64(int64(a.Height)), now)
	return err
}

func (q *Queries) DeleteAsset(ctx context.Context, id string) error {
	_, err := q.db.ExecContext(ctx, `DELETE FROM assets WHERE id = ?`, id)
	return err
}

func scanAsset(s scanner) (Asset, error) {
	var a Asset
	var contentType, createdAt sql.NullString
	var size, width, height sql.NullInt64

	err := s.Scan(&a.ID, &a.Filename, &a.R2Key, &contentType, &size, &width, &height, &createdAt)
	if err != nil {
		return a, err
	}

	a.ContentType = contentType.String
	a.Size = size.Int64
	a.Width = int(width.Int64)
	a.Height = int(height.Int64)
	a.CreatedAt = parseTime(createdAt.String)
	return a, nil
}

func nullInt64(v int64) sql.NullInt64 {
	return sql.NullInt64{Int64: v, Valid: v != 0}
}