package postgres

import (
	"context"
	"encoding/json"
	"time"

	"botpontos/internal/domain"
)

func (s *Store) InsertAudit(ctx context.Context, e domain.AuditEntry) error {
	details := e.Details
	if details == nil {
		details = map[string]any{}
	}
	raw, err := json.Marshal(details)
	if err != nil {
		return err
	}
	_, err = s.pool.Exec(ctx, `
		INSERT INTO audit_logs (source, actor_user_id, actor_account, actor_account_name, target_user_id, event_type, success, details)
		VALUES ($1::text::audit_source, $2, $3, (SELECT username::text FROM web_accounts WHERE id = $3), $4, $5, $6, $7::text::jsonb)`,
		string(e.Source), e.ActorUserID, e.ActorAccount, e.TargetUserID, e.EventType, e.Success, string(raw))
	return err
}

type AuditFilter struct {
	From         *time.Time
	To           *time.Time
	Source       *string
	EventType    *string
	Success      *bool
	TargetUserID *int64
	ActorAccount *int64
	Before       *int64 // cursor: id do último item da página anterior
	Limit        int
}

func (s *Store) ListAudit(ctx context.Context, f AuditFilter) ([]domain.AuditLog, error) {
	if f.Limit <= 0 || f.Limit > 200 {
		f.Limit = 50
	}
	rows, err := s.pool.Query(ctx, `
		SELECT a.id, a.occurred_at, a.source, a.actor_user_id, au.display_name, a.actor_account, COALESCE(wa.username::text, a.actor_account_name),
		       a.target_user_id, tu.display_name, a.event_type, a.success, a.details::text
		FROM audit_logs a
		LEFT JOIN users au ON au.id = a.actor_user_id
		LEFT JOIN web_accounts wa ON wa.id = a.actor_account
		LEFT JOIN users tu ON tu.id = a.target_user_id
		WHERE ($1::timestamptz IS NULL OR a.occurred_at >= $1)
		  AND ($2::timestamptz IS NULL OR a.occurred_at < $2)
		  AND ($3::text IS NULL OR a.source::text = $3)
		  AND ($4::text IS NULL OR a.event_type = $4)
		  AND ($5::boolean IS NULL OR a.success = $5)
		  AND ($6::bigint IS NULL OR a.target_user_id = $6)
		  AND ($7::bigint IS NULL OR a.actor_account = $7)
		  AND ($8::bigint IS NULL OR a.id < $8)
		ORDER BY a.id DESC
		LIMIT $9`,
		f.From, f.To, f.Source, f.EventType, f.Success, f.TargetUserID, f.ActorAccount, f.Before, f.Limit)
	return collect(rows, err, func(row scanner) (domain.AuditLog, error) {
		var l domain.AuditLog
		var source, details string
		if err := row.Scan(&l.ID, &l.OccurredAt, &source, &l.ActorUserID, &l.ActorUserName, &l.ActorAccount,
			&l.ActorUsername, &l.TargetUserID, &l.TargetUserName, &l.EventType, &l.Success, &details); err != nil {
			return l, err
		}
		l.Source = domain.AuditSource(source)
		l.Details = map[string]any{}
		_ = json.Unmarshal([]byte(details), &l.Details)
		return l, nil
	})
}

func (s *Store) DeleteAuditBefore(ctx context.Context, before time.Time) (int64, error) {
	tag, err := s.pool.Exec(ctx, `DELETE FROM audit_logs WHERE occurred_at < $1`, before)
	return tag.RowsAffected(), err
}