package repository

import (
	"context"
	"database/sql"
	"fmt"

	"github.com/luxsin/app-api/internal/model"
)

type OTARepository struct {
	db *sql.DB
}

func NewOTARepository(db *sql.DB) *OTARepository {
	return &OTARepository{db: db}
}

// GetLatestOTA 按 model+hw+beta+status=1 查询最新一条 OTA 记录（verCode 降序）
func (r *OTARepository) GetLatestOTA(ctx context.Context, modelVal string, hw, beta int) (*model.OTA, error) {
	const query = `SELECT id, verCode, verName, url, md5, ` + "`force`" + `, ` + "`desc`" + `, model, hw, target, beta,
		startTime, endTime, status
		FROM ota WHERE model = ? AND hw = ? AND beta = ? AND status = 1
		ORDER BY verCode DESC LIMIT 1`

	var o model.OTA
	var desc, mdl sql.NullString
	var startTime, endTime sql.NullTime

	err := r.db.QueryRowContext(ctx, query, modelVal, hw, beta).Scan(
		&o.ID, &o.VerCode, &o.VerName, &o.URL, &o.MD5, &o.Force, &desc, &mdl,
		&o.HW, &o.Target, &o.Beta,
		&startTime, &endTime, &o.Status,
	)
	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, fmt.Errorf("query ota: %w", err)
	}

	if desc.Valid {
		o.Desc = &desc.String
	}
	if mdl.Valid {
		o.Model = &mdl.String
	}
	if startTime.Valid {
		o.StartTime = &startTime.Time
	}
	if endTime.Valid {
		o.EndTime = &endTime.Time
	}
	return &o, nil
}

// GetLatestOTANotInBlackList 查询最新一条不在黑名单中的 OTA 记录
func (r *OTARepository) GetLatestOTANotInBlackList(ctx context.Context, modelVal string, hw, beta int, mac string) (*model.OTA, error) {
	const query = `SELECT id, verCode, verName, url, md5, ` + "`force`" + `, ` + "`desc`" + `, model, hw, target, beta,
		startTime, endTime, status
		FROM ota WHERE status = 1 AND model = ? AND hw = ? AND beta = ?
		AND id NOT IN (SELECT ota_id FROM black_list WHERE mac = ?)
		ORDER BY verCode DESC LIMIT 1`

	var o model.OTA
	var desc, mdl sql.NullString
	var startTime, endTime sql.NullTime

	err := r.db.QueryRowContext(ctx, query, modelVal, hw, beta, mac).Scan(
		&o.ID, &o.VerCode, &o.VerName, &o.URL, &o.MD5, &o.Force, &desc, &mdl,
		&o.HW, &o.Target, &o.Beta,
		&startTime, &endTime, &o.Status,
	)
	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, fmt.Errorf("query ota not in blacklist: %w", err)
	}

	if desc.Valid {
		o.Desc = &desc.String
	}
	if mdl.Valid {
		o.Model = &mdl.String
	}
	if startTime.Valid {
		o.StartTime = &startTime.Time
	}
	if endTime.Valid {
		o.EndTime = &endTime.Time
	}
	return &o, nil
}

// GetLatestOTANotTarget 查询最新一条非定向的 OTA 记录
func (r *OTARepository) GetLatestOTANotTarget(ctx context.Context, modelVal string, hw, beta int) (*model.OTA, error) {
	const query = `SELECT id, verCode, verName, url, md5, ` + "`force`" + `, ` + "`desc`" + `, model, hw, target, beta,
		startTime, endTime, status
		FROM ota WHERE status = 1 AND model = ? AND hw = ? AND beta = ? AND target = 0
		ORDER BY verCode DESC LIMIT 1`

	var o model.OTA
	var desc, mdl sql.NullString
	var startTime, endTime sql.NullTime

	err := r.db.QueryRowContext(ctx, query, modelVal, hw, beta).Scan(
		&o.ID, &o.VerCode, &o.VerName, &o.URL, &o.MD5, &o.Force, &desc, &mdl,
		&o.HW, &o.Target, &o.Beta,
		&startTime, &endTime, &o.Status,
	)
	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, fmt.Errorf("query ota not target: %w", err)
	}

	if desc.Valid {
		o.Desc = &desc.String
	}
	if mdl.Valid {
		o.Model = &mdl.String
	}
	if startTime.Valid {
		o.StartTime = &startTime.Time
	}
	if endTime.Valid {
		o.EndTime = &endTime.Time
	}
	return &o, nil
}

// IsInBlackList 检查 mac 是否在指定 ota_id 的黑名单中
func (r *OTARepository) IsInBlackList(ctx context.Context, otaID int, mac string) (bool, error) {
	const query = `SELECT COUNT(*) FROM black_list WHERE ota_id = ? AND mac = ?`

	var count int
	if err := r.db.QueryRowContext(ctx, query, otaID, mac).Scan(&count); err != nil {
		return false, fmt.Errorf("query black_list: %w", err)
	}
	return count > 0, nil
}

// FindTargetDevice 检查 mac 是否在指定 ota_id 的定向设备中
func (r *OTARepository) FindTargetDevice(ctx context.Context, otaID int, mac string) (*model.OTATargetDevice, error) {
	const query = `SELECT id, ota_id, mac_addr, create_at FROM ota_target_device WHERE ota_id = ? AND mac_addr = ?`

	var d model.OTATargetDevice
	err := r.db.QueryRowContext(ctx, query, otaID, mac).Scan(&d.ID, &d.OTAID, &d.MacAddr, &d.CreateAt)
	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, fmt.Errorf("query ota_target_device: %w", err)
	}
	return &d, nil
}