package registry

import (
	"context"
	"database/sql"

	"reanimator/internal/domain"
	"reanimator/internal/idgen"
)

type ProjectRepository struct {
	db    *sql.DB
	idgen *idgen.Generator
}

func NewProjectRepository(db *sql.DB) *ProjectRepository {
	return &ProjectRepository{
		db:    db,
		idgen: idgen.NewGenerator(db),
	}
}

func (r *ProjectRepository) Create(ctx context.Context, customerID string, name string) (domain.Project, error) {
	// Generate string ID
	id, err := r.idgen.Generate(ctx, idgen.Project)
	if err != nil {
		return domain.Project{}, err
	}

	_, err = r.db.ExecContext(ctx,
		`INSERT INTO projects (id, customer_id, name) VALUES (?, ?, ?)`,
		id, customerID, name,
	)
	if err != nil {
		return domain.Project{}, classifyError(err)
	}

	return r.Get(ctx, id)
}

func (r *ProjectRepository) Get(ctx context.Context, id string) (domain.Project, error) {
	var project domain.Project

	row := r.db.QueryRowContext(ctx,
		`SELECT id, customer_id, name, created_at, updated_at FROM projects WHERE id = ?`,
		id,
	)
	if err := row.Scan(&project.ID, &project.CustomerID, &project.Name, &project.CreatedAt, &project.UpdatedAt); err != nil {
		if err == sql.ErrNoRows {
			return domain.Project{}, ErrNotFound
		}
		return domain.Project{}, err
	}

	return project, nil
}

func (r *ProjectRepository) List(ctx context.Context) ([]domain.Project, error) {
	rows, err := r.db.QueryContext(ctx,
		`SELECT id, customer_id, name, created_at, updated_at FROM projects ORDER BY created_at DESC`,
	)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	projects := make([]domain.Project, 0)
	for rows.Next() {
		var project domain.Project
		if err := rows.Scan(&project.ID, &project.CustomerID, &project.Name, &project.CreatedAt, &project.UpdatedAt); err != nil {
			return nil, err
		}
		projects = append(projects, project)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}

	return projects, nil
}