package impl

import (
	"ai_scheduler/internal/data/model"
	"ai_scheduler/tmpl/dataTemp"
	"ai_scheduler/utils"
	"context"
	"time"
)

// AdviceFollowImpl 统管两张表的数据访问：
//   - ai_advice_remind_task（定时提醒）
//   - ai_advice_deal_lead（成交线索）
// DataTemp 基础模型仅占位，所有方法显式 Model(&具体结构体{})。
type AdviceFollowImpl struct {
	dataTemp.DataTemp
}

func NewAdviceFollowImpl(db *utils.Db) *AdviceFollowImpl {
	return &AdviceFollowImpl{
		DataTemp: *dataTemp.NewDataTemp(db, new(model.AiAdviceRemindTask)),
	}
}

// ================= 定时提醒 ai_advice_remind_task =================

// RemindAdd 新增一条定时提醒。
func (a *AdviceFollowImpl) RemindAdd(ctx context.Context, record *model.AiAdviceRemindTask) (int64, error) {
	if err := a.Db.WithContext(ctx).Create(record).Error; err != nil {
		return 0, err
	}
	return record.Id, nil
}

// RemindExists 去重：同客户 + 到点时间 + 标题 是否已存在。
func (a *AdviceFollowImpl) RemindExists(ctx context.Context, clientId string, dueAt time.Time, title string) (bool, error) {
	var count int64
	err := a.Db.WithContext(ctx).Model(&model.AiAdviceRemindTask{}).
		Where("client_id = ? AND due_at = ? AND title = ?", clientId, dueAt, title).
		Count(&count).Error
	return count > 0, err
}

// FindDueRemind 取到点且待执行的提醒（供 cron 每分钟执行）。
func (a *AdviceFollowImpl) FindDueRemind(ctx context.Context, now time.Time) ([]model.AiAdviceRemindTask, error) {
	var list []model.AiAdviceRemindTask
	err := a.Db.WithContext(ctx).
		Where("status = ? AND due_at <= ?", model.FollowStatusPending, now).
		Order("due_at asc").Limit(200).
		Find(&list).Error
	return list, err
}

// RemindList 定时提醒列表（按到点时间倒序，支持项目/客户/状态过滤 + 分页）。
func (a *AdviceFollowImpl) RemindList(ctx context.Context, projectId int32, clientId, wxid, status string, page, pageSize int) ([]model.AiAdviceRemindTask, error) {
	query := a.Db.WithContext(ctx).Model(&model.AiAdviceRemindTask{})
	if projectId != 0 {
		query = query.Where("project_id = ?", projectId)
	}
	if clientId != "" {
		query = query.Where("client_id = ?", clientId)
	}
	if wxid != "" {
		query = query.Where("wxid = ?", wxid)
	}
	if status != "" {
		query = query.Where("status = ?", status)
	}
	query = query.Order("due_at desc")
	if pageSize > 0 {
		if page < 1 {
			page = 1
		}
		query = query.Offset((page - 1) * pageSize).Limit(pageSize)
	} else {
		query = query.Limit(200)
	}
	var list []model.AiAdviceRemindTask
	err := query.Find(&list).Error
	return list, err
}

// RemindUpdateStatusIfPending 仅当提醒仍为 pending 时更新状态（幂等），返回受影响行数。
func (a *AdviceFollowImpl) RemindUpdateStatusIfPending(ctx context.Context, id int64, status, result, errMsg string) (int64, error) {
	now := time.Now()
	set := map[string]interface{}{"status": status, "done_at": now, "update_at": now}
	if result != "" {
		set["result"] = result
	}
	if errMsg != "" {
		set["err_msg"] = errMsg
	}
	res := a.Db.WithContext(ctx).Model(&model.AiAdviceRemindTask{}).
		Where("id = ? AND status = ?", id, model.FollowStatusPending).
		Updates(set)
	return res.RowsAffected, res.Error
}

// ================= 成交线索 ai_advice_deal_lead =================

// LeadAdd 新增一条成交线索。
func (a *AdviceFollowImpl) LeadAdd(ctx context.Context, record *model.AiAdviceDealLead) (int64, error) {
	if err := a.Db.WithContext(ctx).Create(record).Error; err != nil {
		return 0, err
	}
	return record.Id, nil
}

// LeadExists 去重：同客户 + 线索类型 + 期望时间 + 标题 是否已存在。
func (a *AdviceFollowImpl) LeadExists(ctx context.Context, clientId, leadType string, expectAt time.Time, title string) (bool, error) {
	var count int64
	err := a.Db.WithContext(ctx).Model(&model.AiAdviceDealLead{}).
		Where("client_id = ? AND lead_type = ? AND expect_at = ? AND title = ?", clientId, leadType, expectAt, title).
		Count(&count).Error
	return count > 0, err
}

// FindActiveLeadsByWxid 取某客户尚未闭环的成交线索（pending），供对话注入。
func (a *AdviceFollowImpl) FindActiveLeadsByWxid(ctx context.Context, wxid string) ([]model.AiAdviceDealLead, error) {
	var list []model.AiAdviceDealLead
	if wxid == "" {
		return list, nil
	}
	err := a.Db.WithContext(ctx).
		Where("wxid = ? AND status = ?", wxid, model.FollowStatusPending).
		Order("expect_at asc").Limit(20).
		Find(&list).Error
	return list, err
}

// LeadList 成交线索列表（按期望时间倒序，支持项目/客户/状态/线索类型过滤 + 分页）。
func (a *AdviceFollowImpl) LeadList(ctx context.Context, projectId int32, clientId, wxid, status, leadType string, page, pageSize int) ([]model.AiAdviceDealLead, error) {
	query := a.Db.WithContext(ctx).Model(&model.AiAdviceDealLead{})
	if projectId != 0 {
		query = query.Where("project_id = ?", projectId)
	}
	if clientId != "" {
		query = query.Where("client_id = ?", clientId)
	}
	if wxid != "" {
		query = query.Where("wxid = ?", wxid)
	}
	if status != "" {
		query = query.Where("status = ?", status)
	}
	if leadType != "" {
		query = query.Where("lead_type = ?", leadType)
	}
	query = query.Order("expect_at desc")
	if pageSize > 0 {
		if page < 1 {
			page = 1
		}
		query = query.Offset((page - 1) * pageSize).Limit(pageSize)
	} else {
		query = query.Limit(200)
	}
	var list []model.AiAdviceDealLead
	err := query.Find(&list).Error
	return list, err
}

// LeadUpdateStatusIfPending 仅当线索仍为 pending 时更新状态/跟进结果（幂等），返回受影响行数。
func (a *AdviceFollowImpl) LeadUpdateStatusIfPending(ctx context.Context, id int64, status, result string) (int64, error) {
	now := time.Now()
	set := map[string]interface{}{"status": status, "done_at": now, "update_at": now}
	if result != "" {
		set["result"] = result
	}
	res := a.Db.WithContext(ctx).Model(&model.AiAdviceDealLead{}).
		Where("id = ? AND status = ?", id, model.FollowStatusPending).
		Updates(set)
	return res.RowsAffected, res.Error
}