package repository

import (
	"database/sql"
	"time"

	"gpt-manager-go/internal/models"
)

// AdminRepository 管理员仓储
type AdminRepository struct {
	db *sql.DB
}

// NewAdminRepository 创建管理员仓储
func NewAdminRepository(db *sql.DB) *AdminRepository {
	return &AdminRepository{db: db}
}

// FindByUsername 根据用户名查找管理员
func (r *AdminRepository) FindByUsername(username string) (*models.Admin, error) {
	admin := &models.Admin{}
	err := r.db.QueryRow(`
		SELECT id, username, email, password_hash, is_super_admin, is_active, created_at, last_login
		FROM admins WHERE username = $1
	`, username).Scan(
		&admin.ID,
		&admin.Username,
		&admin.Email,
		&admin.PasswordHash,
		&admin.IsSuperAdmin,
		&admin.IsActive,
		&admin.CreatedAt,
		&admin.LastLogin,
	)

	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}
	return admin, nil
}

// FindByEmail 根据邮箱查找管理员
func (r *AdminRepository) FindByEmail(email string) (*models.Admin, error) {
	admin := &models.Admin{}
	err := r.db.QueryRow(`
		SELECT id, username, email, password_hash, is_super_admin, is_active, created_at, last_login
		FROM admins WHERE email = $1
	`, email).Scan(
		&admin.ID,
		&admin.Username,
		&admin.Email,
		&admin.PasswordHash,
		&admin.IsSuperAdmin,
		&admin.IsActive,
		&admin.CreatedAt,
		&admin.LastLogin,
	)

	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}
	return admin, nil
}

// FindByID 根据 ID 查找管理员
func (r *AdminRepository) FindByID(id int) (*models.Admin, error) {
	admin := &models.Admin{}
	err := r.db.QueryRow(`
		SELECT id, username, email, password_hash, is_super_admin, is_active, created_at, last_login
		FROM admins WHERE id = $1
	`, id).Scan(
		&admin.ID,
		&admin.Username,
		&admin.Email,
		&admin.PasswordHash,
		&admin.IsSuperAdmin,
		&admin.IsActive,
		&admin.CreatedAt,
		&admin.LastLogin,
	)

	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}
	return admin, nil
}

// Create 创建管理员
func (r *AdminRepository) Create(admin *models.Admin) error {
	return r.db.QueryRow(`
		INSERT INTO admins (username, email, password_hash, is_super_admin, is_active, created_at)
		VALUES ($1, $2, $3, $4, $5, $6)
		RETURNING id
	`,
		admin.Username,
		admin.Email,
		admin.PasswordHash,
		admin.IsSuperAdmin,
		admin.IsActive,
		time.Now(),
	).Scan(&admin.ID)
}

// UpdateLastLogin 更新最后登录时间
func (r *AdminRepository) UpdateLastLogin(id int) error {
	_, err := r.db.Exec(`
		UPDATE admins SET last_login = $1 WHERE id = $2
	`, time.Now(), id)
	return err
}